Page 1 Operation & UEAM007200 Maintenance Manual PC450 PC450LC HYDRAULIC EXCAVATOR SERIAL NUMBER PC450-8 - K50001 and up PC450LC-8 - K50001 and up PC450LCD-8 - K50001 and up PC450LCHD-8 - K50001 and up WARNING Unsafe use of this machine may cause serious injury or death.
Page 3 FOREWORD...
Page 4 Keep this manual at the storage location for the Operation and Maintenance Manual given below so that all personnel involved in working on the machine can consult it periodically. In case this manual should be lost or damaged, immediately contact Komatsu or your Komatsu distributor to obtain a new copy.
Page 5: Foreword
FOREWORD SAFETY INFORMATION SAFETY INFORMATION To enable you to use this machine safely, safety precautions and labels are given in this manual and affixed to the machine to give explanations of situations involving potential hazards and of the methods of avoiding such situa- tions.
Page 6 Continuing improvements in the design of this machine can lead to changes in detail which may not be reflected in this manual. Consult Komatsu or your Komatsu distributor for the latest available information of your machine or for questions regarding information in this manual.
Page 7: Noise Emission Levels
FOREWORD SAFETY INFORMATION Noise emission levels Two labels indicating the machine noise level are affixed on the machine. q Sound pressure level at the operator’s station, measured according to ISO6396 (Dynamic test method, simulated working cycle). q Sound power level emitted by the machine, measured according to ISO 6395 (Dynamic test method, simulated working cycle).
Page 8: Vibration Levels
FOREWORD SAFETY INFORMATION Vibration levels When used for its intended purpose, levels of vibration for the earth-moving machine transmitted from the opera- tor’s seat are lower than or equal to the tested vibrations for the relative machinery class in compliance with ISO 7096.
Page 9 FOREWORD SAFETY INFORMATION 7. Minimize vibrations for long work cycle or long distance traveling q Reduce speed to prevent bounce q Transport machines long distances between work sites 8. The following guidelines can be effective to minimize risks of low back pain q Operate the machine only when you are in good health.
Page 10: Introduction
FOREWORD INTRODUCTION INTRODUCTION This Komatsu machine is designed to be used mainly for the following work: q Digging work q Leveling work q Ditching work q Loading work q Demolition work See the section “RECOMMENDED APPLICATIONS (3-162)“ for further details.
Page 11: Visibility From Operator's Seat
FOREWORD INTRODUCTION VISIBILITY FROM OPERATOR'S SEAT The visibility standards (ISO 5006) for this machine require a view shown in the diagram below. PROXIMITY VISIBILITY The visibility of this machine in the area 1 m from the outside surface of the machine at a height of 1.5 m is shown in the diagram below.
Page 12: Breaking-In The New Machine
BREAKING-IN THE NEW MACHINE NOTICE Your Komatsu machine has been thoroughly adjusted and tested before shipment from the factory. How- ever, operating the machine under full load before breaking the machine in can adversely affect the perfor- mance and shorten the machine life.
Page 13: Product Information
FOREWORD PRODUCT INFORMATION PRODUCT INFORMATION When requesting service or ordering replacement parts, please inform your Komatsu distributor of the following items. PRODUCT IDENTIFICATION NUMBER (PIN)/MACHINE SERIAL NO. PLATE On the bottom right of the operator's cab The design of the nameplate differs according to the territory.
Page 14: Service Meter Location
SERVICE METER LOCATION On top of the machine monitor YOUR MACHINE SERIAL NUMBERS AND DISTRIBUTOR Machine serial No. Engine serial No. Product identification number (PIN) Manufacturers name KOMATSU UK LTD. Address Durham Road Birtley Chester-Le Street County Durham DH32QX United Kingdom...
Page 15: Machine Serial Plate
MANUFACTURING YEAR MODEL SERIAL MODEL SERIAL No. MANUFACT. YEAR MASS WEIGHT ENGINE POWER ENGINE POWER Product Identification Number PRODUCT IDENTIFICATION Manufactured by Komatsu UK Ltd. MANUFACTURER NUMBER for Komatsu Ltd.,Tokyo,Japan MANUFACTURER 205-00-K1291 Komatsu UK Ltd, Birtley, Co Durham, United Kingdom 1-13...
Page 16: Table Of Contents
CONTENTS CONTENTS FOREWORD FOREWORD ................................. 1-2 SAFETY INFORMATION............................1-3 Noise emission levels ..........................1-5 Vibration levels............................1-6 Guide to Reduce Vibration Levels on Machine.................. 1-6 INTRODUCTION..............................1-8 DIRECTIONS OF MACHINE ........................1-8 VISIBILITY FROM OPERATOR'S SEAT ....................1-9 PROXIMITY VISIBILITY ........................1-9 12M CIRCUMFERENCE VISIBILITY ....................
Page 17 CONTENTS OPERATION MACHINE VIEW ILLUSTRATIONS ........................3-2 OVERALL MACHINE VIEW........................3-2 CONTROLS AND GAUGES ........................3-3 Machine Monitor ............................3-4 DETAILED CONTROLS AND GAUGES......................3-5 MONITORING SYSTEM..........................3-5 Basic Operation of Machine Monitor....................3-6 Emergency Monitors........................3-11 Caution Monitors..........................3-13 Basic Check Monitors ........................
Page 18 CONTENTS Releasing Hydraulic Pressure With Accumulator ................3-110 MACHINE OPERATIONS AND CONTROLS....................3-111 BEFORE STARTING ENGINE ....................... 3-111 Walk-around Checks ........................3-111 Checks Before Starting ........................3-112 Adjustment............................. 3-119 Seat Belt ............................3-125 Operations Before Starting Engine ....................3-126 STARTING ENGINE ..........................3-128 AFTER STARTING ENGINE ........................
Page 19 OUTLINE OF SERVICE............................4-4 HANDLING OIL, FUEL, COOLANT, AND PERFORMING OIL CLINIC ............. 4-4 OIL ..............................4-4 FUEL..............................4-5 COOLANT AND WATER FOR DILUTION ..................4-5 GREASE............................4-6 CARRYING OUT KOWA (Komatsu Oil Wear Analysis) ..............4-6 STORING OIL AND FUEL......................... 4-7 1-17...
Page 20 ELECTRIC SYSTEM MAINTENANCE ..................... 4-10 WEAR PARTS ..............................4-11 WEAR PARTS LIST..........................4-11 RECOMMENDED FUEL, COOLANT, AND LUBRICANT ................. 4-12 RECOMMENDED BRANDS, RECOMMENDED QUALITY FOR PRODUCTS OTHER THAN KOMATSU GENUINE OIL............................4-14 TIGHTENING TORQUE SPECIFICATIONS ...................... 4-15 TIGHTENING TORQUE LIST ........................4-15 SAFETY CRITICAL PARTS ..........................
Page 21 CONTENTS CLEAN AND INSPECT RADIATOR FINS, OIL COOLER FINS, AFTERCOOLER FINS AND CONDENSER FINS......................... 4-61 CLEAN AIR CONDITIONER FRESH/RECIRC FILTERS..............4-62 REPLACE BREATHER ELEMENT IN HYDRAULIC TANK ............4-64 CHECK OIL LEVEL IN SWING MACHINERY CASE, ADD OIL............4-65 CHECK OIL LEVEL IN FINAL DRIVE CASE, ADD OIL ..............4-66 EVERY 1000 HOURS MAINTENANCE....................
Page 22 CONTENTS HYDRAULIC QUICK COUPLER PIPING......................6-4 LOCATIONS ............................6-4 OPERATION............................6-5 BUCKET WITH HOOK ............................6-7 HOOK CONDITION ............................ 6-7 PROHIBITED OPERATIONS ........................6-7 MACHINE READY FOR ATTACHMENT ......................6-8 LOCATIONS ............................... 6-8 HYDRAULIC CIRCUIT..........................6-12 Switching Hydraulic Circuit ......................6-12 Adjusting Oil Flow ..........................
Page 23 CONTENTS TRANSPORTATION OF SUPER LONG FRONT MACHINE ............6-43 WORKING RANGE OF SUPER LONG FRONT..................6-44 LIFTING CAPACITY PC450 LC 20m SUPER LONG FRONT ............6-45 MAINTENANCE............................6-46 SPECIAL SERVICE REQUIREMENTS FOR SUPER LONG FRONT WORK EQUIPMENT..6-46 EVERY 50 HOURS SERVICE......................6-47 EVERY 100 HOURS SERVICE......................
Page 24 CONTENTS FITTING DEMOLITION DIGGING EQUIPMENT................7-35 REMOVAL OF DEMOLITION DIGGING EQUIPMENT..............7-39 CONNECTING DIGGING ARM TO DEMOLITION DIGGING BOOM ..........7-39 MEDIUM REACH..........................7-40 PURGING AIR PROCEDURES .......................... 7-41 PURGING PROCEDURE TO REMOVE AIR FROM HYDRAULIC CYLINDER LINES......7-41 PROCEDURE FOR PURGING AIR FROM BOOM LOCK VALVE PPC CIRCUIT........
Page 25: Safety
SAFETY WARNING Please read and make sure that you fully understand the precautions described in this manual and the safety labels on the machine. When operating or servicing the machine, always follow these precautions strictly.
Page 26: Safety Information
SAFETY SAFETY INFORMATION SAFETY INFORMATION SAFETY LABELS..............................2-42 LOCATION OF SAFETY LABELS ....................... 2-42 SAFETY LABELS............................2-52 SAFETY INFORMATION Safety rules ..............................2-132 If problems are found ..........................2-132 Working wear and personal protective items ..................... 2-132 Fire extinguisher and first aid kit ........................ 2-132 Safety equipment ............................
Page 27 SAFETY SAFETY INFORMATION Battery hazard prevention........................2-312 Starting engine with booster cables ....................2-322 TOWING ..............................2-332 Safety rules for towing ........................2-332 LIFTING OBJECTS WITH BUCKET......................2-342 Safety rules for lifting objects ......................2-342 SAFETY MAINTENANCE INFORMATION....................... 2-352 Warning Tag .............................. 2-352 Keep Work Place Clean and Tidy ......................
Page 28: Safety Labels
If the labels are damaged, lost, or cannot be read properly, replace them with new ones. For details of the part numbers for the labels, see this manual or the actual label, and place an order with Komatsu distributor. LOCATION OF SAFETY LABELS...
Page 29: Safety Labels
SAFETY SAFETY LABELS SAFETY LABELS 1. (20Y-00-K2020) Warnings for operation, inspection and maintenance Improper operation and maintenance can cause serious injury or death. Read the manual and labels before operation and mainte- nance. Follow instructions and warnings in manual and in labels on machine.
Page 30 SAFETY SAFETY LABELS b. Always apply lock when leaving operator’s seat. c. WARNING - No passengers No passengers allowed to ride on machine while it is moving d. WARNING - DANGER OF FALLING OBJECTS Do not operate where a danger of falling objects exists. Consult your dealer for fitting of FOPS protection...
Page 31 SAFETY SAFETY LABELS e. Caution for going close to electric cables. An electrocution hazard if the machine is brought too near to electric power lines Keep a safe distance from electric power lines. f. Control levers operational function diagram. WARNING In order to prevent an accident resulting in injury or death caused by error-operation, confirm the machine motion a n d i n d i c a t e d o p e r a t i n g pa t t e r n , w h e n o p e r a t i n g...
Page 32 SAFETY SAFETY LABELS (3) Caution when stowing front window (09803-A0481) Sign indicates a hazard from falling window. After raising window, be sure to lock it in place with lock pins. (4) Caution for high-temperature coolant and hydraulic oil (09653-A0481) Never remove the cap when the engine is at operating (high) temperature.
Page 33 SAFETY SAFETY LABELS (7) Caution for handling cable (09808-A0881) Sign indicates an electric hazard from handling the cable. Read manual for safe and proper handling. (8) Stop rotating parts when inspection and maintenance (09667-A0481) Sign indicates a hazard of rotating parts, such as belt. Turn off before inspection and maintenance.
Page 34 SAFETY SAFETY LABELS (10) Caution against falling (09805-A0881) There is the hazard of falling down. Do not go close to the edge of the machine by mistake. (11) Caution against falling (09805-C0481) Sign indicates a hazard of falling. Do not step here!. (12) Prohibited to enter within swing range (20E-00-K1150) There is danger of getting caught when upper structure swings.
Page 35 SAFETY SAFETY LABELS (13) Caution for use of hydraulic quick coupler piping system (20J-00-11271) There is a danger of an exposed person being killed by fall- ing attachment. Read the manual for safe operation. 14) (206-00-K1010) Pump Control override switch and swing lock override switch Read the operation manual before operation (15) Keeping out of working range area (20E-00-K1140) Sign indicates a hazard of being hit by the working device of...
Page 36 SAFETY SAFETY LABELS (16) Prohibition of jump start (09842-A0481) Start the engine only after sitting down in the operator’s seat. Do not attempt to start the engine by short-circuiting the engine starting circuit. Such an act may cause a serious bodily injury or fire.
Page 37: Safety Information
SAFETY SAFETY INFORMATION SAFETY INFORMATION SAFETY RULES Only trained and authorized personnel can operate and maintain the machine. Follow all safety rules, precautions and instructions when operating or performing maintenance on the machine. If you are under the influence of alcohol or medication, your ability to safely operate or repair your machine may be severely impaired putting yourself and everyone else on your job site in danger.
Page 38 SAFETY SAFETY INFORMATION SAFETY EQUIPMENT Be sure that all guards and covers are in their proper position. Have guards and covers repaired immediately if they are damaged. Understand the method of use of safety features and use them properly. Never remove any safety features. Always keep them in good operating condition. KEEP MACHINE CLEAN If water gets into the electrical system, there is a hazard that it will cause malfunctions or incorrect operation.
Page 39 SAFETY SAFETY INFORMATION HANDRAILS AND STEPS To prevent personal injury caused by slipping or falling off the machine, always do as follows. Use the handrails and steps marked by arrows in the dia- gram on the right when getting on or off the machine. To ensure safety, always face the machine and maintain three-point contact (both feet and one hand, or both hands and one foot) with the handrails and steps (including the...
Page 40 SAFETY SAFETY INFORMATION BURN PREVENTION Hot coolant To prevent burns from hot water or steam spurting out when checking or draining the coolant, wait for the water to cool to a temperature where it is possible to touch the radiator cap by hand before starting the operation.
Page 41 SAFETY SAFETY INFORMATION Fire caused by accumulation of flammable material. Remove any dry leaves, chips, pieces of paper, dust, or any other flammable materials accumulated or affixed around the engine, exhaust manifold, muffler, or battery, or inside the undercovers. Fire coming from electric wiring Short circuits in the electrical system can cause fire.
Page 42 The above recommendations assume that the conditions are for standard operations, but it may be necessary to add additional guards according to the operating conditions on the job site. Always contact your Komatsu distributor for advice. ATTACHMENT INSTALLATION When installing optional parts or attachments, there may be problems with safety or legal restrictions. Therefore contact your Komatsu distributor for advice.
Page 43 SAFETY INFORMATION UNAUTHORIZED MODIFICATIONS If this machine is modified without permission from Komatsu, there is danger that problems may occur with safety and that this may lead to serious personal injury. Modifications may have an adverse effect on items such as machine strength and visibility.
Page 44 Komatsu distributor immediately and ask for repairs to be carried out.
Page 45 This machine does not use asbestos, but there is a danger that imitation parts may contain asbestos, so always use genuine Komatsu parts. ELECTROMAGNETIC INTERFERENCE When this machine is operating close to a source of high electromagnetic interference, such as a radar station, some abnormal phenomena may be observed.
Page 46: Safety Machine Operation
SAFETY SAFETY MACHINE OPERATION SAFETY MACHINE OPERATION STARTING ENGINE If there is a warning tag hanging from the work equipment con- trol lever, do not start the engine or touch the levers. CHECKS BEFORE STARTING ENGINE Carry out the following checks before starting the engine at the beginning of the day's work. Remove all dirt from the surface of the window glass to ensure a good view.
Page 47 SAFETY SAFETY MACHINE OPERATION SAFETY RULES FOR STARTING ENGINE Start and operate the machine only while seated. Do not attempt to start the engine by short-circuiting the engine starting circuit. Such an act may cause a seri- ous bodily injury or fire. When starting the engine, sound the horn as a warning.
Page 48: Operation
SAFETY SAFETY MACHINE OPERATION OPERATION CHECKS BEFORE OPERATION When carrying out the checks, move the machine to a wide area where there are no obstructions, and operate slowly. Do not allow anyone near the machine. Always fasten your seat belt. Check that the movement of the machine matches the display on the control pattern card.
Page 49 SAFETY SAFETY MACHINE OPERATION SAFETY RULES FOR TRAVELING When traveling on level ground, keep the work equipment at a height of 40 to 50 cm from the ground. If the work equipment blocks the view and it is difficult to travel in safety, raise the work equipment to a greater height.
Page 50 SAFETY SAFETY MACHINE OPERATION When traveling up a steep slope, extend the work equipment to the front to improve the balance, keep the work equipment approximately 20 to 30 cm above the ground, and travel at low speed. When traveling downhill, lower the engine speed, keep the travel lever close to the neutral position, and travel at low speed.
Page 51 SAFETY SAFETY MACHINE OPERATION PROHIBITED OPERATIONS Never dig the work face under an overhang. There is a haz- ard that rocks may fall or that the overhang may collapse and fall on top of the machine. Do not excavate too deeply under the front of the machine. The ground under the machine may collapse and cause the machine to fall.
Page 52 SAFETY SAFETY MACHINE OPERATION In the operation using the fork or grapple, do not attempt to pick up an object with their tips. There is a danger of damage to the machine or personal injury, as the picked - up object can easily slip off. Do not use the impact force of the work equipment for break- ing work.
Page 53 SAFETY SAFETY MACHINE OPERATION PARKING MACHINE Park the machine on firm, level ground. Select a place where there is no hazard of falling rocks or landslides, or of flooding if the land is low. Lower the work equipment completely to the ground. When leaving the machine, set lock lever (1) to the LOCK position (L), then stop the engine.
Page 54: Transportation
SAFETY MACHINE OPERATION TRANSPORTATION The machine can be divided into parts for transportation, so when transporting the machine, please contact your Komatsu distributor to have the work carried out. LOADING AND UNLOADING When loading or unloading the machine, mistaken operation may bring the hazard of the machine tipping over or falling, so particular care is necessary.
Page 55: Battery
SAFETY SAFETY MACHINE OPERATION BATTERY BATTERY HAZARD PREVENTION Battery electrolyte contains sulphuric acid, and batteries generate flammable hydrogen gas, which may explode. Mistaken handling can lead to serious injury or fire. For this reason, always observe the following precautions. Do not use or charge the battery if the battery electrolyte level is below the LOWER LEVEL line. This may cause an explosion.
Page 56: Starting Engine With Booster Cables
SAFETY SAFETY MACHINE OPERATION STARTING ENGINE WITH BOOSTER CABLES If any mistake is made in the method of connecting the booster cables, it may cause the battery to explode, so always do as follows. When starting with a booster cable, carry out the starting operation with two workers (one worker sitting in the opera- tor's seat and the other working with the battery).
Page 57: Towing
SAFETY SAFETY MACHINE OPERATION TOWING SAFETY RULES FOR TOWING Serious injury or death could result if a disabled machine is towed incorrectly or if there is a mistake in the selec- tion or inspection of the wire rope. For towing, see “TOWING THE MACHINE (3-190)“. Always check that the wire rope used for towing has ample strength for the weight of the machine being towed.
Page 58: Lifting Objects With Bucket
SAFETY SAFETY MACHINE OPERATION LIFTING OBJECTS WITH BUCKET SAFETY RULES FOR LIFTING OBJECTS Determine the signals to be used and place a signalman in position. To prevent the machine from tipping over or falling, carry out the operation on flat ground. To prevent the danger of contact with a raised load or the danger from a falling load, do not allow any worker inside the area.
Page 59: Safety Maintenance Information
SAFETY SAFETY MAINTENANCE INFORMATION SAFETY MAINTENANCE INFORMATION WARNING TAG Always attach the “DO NOT OPERATE“ warning tag to the work equipment control lever in the operator's cab to alert others that you are performing service or maintenance on the machine. Attach additional warning tags around the machine if necessary.
Page 60: Stop Engine Before Carrying Out Maintenance
SAFETY SAFETY MAINTENANCE INFORMATION STOP ENGINE BEFORE CARRYING OUT MAINTENANCE Stop the machine on firm, level ground. Select a place where there is no hazard of falling rocks or landslides, or of flooding if the land is low. Lower the work equipment completely to the ground and stop the engine.
Page 61: Proper Tools
Do not make holes in it, weld it, or use a cutting torch. Do not hit or roll the accumulator, or subject it to any impact. When disposing of the accumulator, the gas must be released. Please contact your Komatsu distributor to have this work performed. PERSONNEL Only authorized personnel can service and repair the machine.
Page 62: Attachments
SAFETY SAFETY MAINTENANCE INFORMATION ATTACHMENTS Appoint a leader before starting removal or installation oper- ations for attachments. Place attachments that have been removed from the machine in a stable condition so that they do not fall. And take steps to prevent unauthorized persons from entering the storage area.
Page 63: Removing Battery Terminals
If it is disassembled by mistake, the spring will fly out and cause serious injury. When it becomes necessary to disassemble it, ask your Komatsu distributor to do the work. SAFETY RULES FOR HIGH-PRESSURE OIL The hydraulic system is always under internal pressure.
Page 64: Precaution For High Fuel Pressure
If any loose bolts are found, stop work and tighten to the specified torque. If any damaged hoses are found, stop operations immediately and contact your Komatsu distributor. Replace the hose if any of the following problems are found.
Page 65: Waste Materials
SAFETY SAFETY MAINTENANCE INFORMATION WASTE MATERIALS To prevent pollution, pay careful attention to the method of disposing of waste materials. Always put oil drained from your machine in containers. Never drain oil directly onto the ground or dump into the sewage system, rivers, the sea, or lakes.
Page 66 SAFETY SAFETY MAINTENANCE INFORMATION 2-42...
Page 67 OPERATION WARNING Please read and make sure that you understand the SAFETY section before reading this section.
Page 68: Operation
OPERATION MACHINE VIEW ILLUSTRATIONS MACHINE VIEW ILLUSTRATIONS OVERALL MACHINE VIEW Bucket Boom cylinder Bucket cylinder Sprocket Track frame Arm cylinder Track shoe Boom (10) Idler...
Page 69: Controls And Gauges
OPERATION MACHINE VIEW ILLUSTRATIONS CONTROLS AND GAUGES Radio (18) Attachment control pedal (if equipped) Lock lever (19) Room lamp switch Left work equipment control lever (20) Emergency pump drive switch One-touch power max. switch (21) Swing parking brake release switch Travel pedals (22) Lower wiper switch Travel levers...
Page 70: Machine Monitor
OPERATION MACHINE VIEW ILLUSTRATIONS Machine Monitor AA: Screen for standard BB: Screen with all lamps lighted up CC: Maintenance time warning screen Wiper switch (16) Window washer switch Buzzer cancel switch (17) Air conditioner control switch Auto-deceleration switch (18) Engine oil pressure monitor Engine coolant temperature monitor (19) Charge level monitor Engine coolant temperature gauge...
Page 71: Detailed Controls And Gauges
OPERATION DETAILED CONTROLS AND GAUGES DETAILED CONTROLS AND GAUGES The following is an explanation of devices needed for operating the machine. To perform suitable operations correctly and safely, it is important to completely understand methods of operating the equipment, and the meanings of the displays. MONITORING SYSTEM AA: Screen for standard BB: Screen with all lamps lighted up...
Page 72: Basic Operation Of Machine Monitor
OPERATION DETAILED CONTROLS AND GAUGES Basic Operation of Machine Monitor Starting Engine When Situation is Normal When the starting switch is turned to the ON position, the opening screen GG is displayed. After the opening screen GG is displayed for 2 seconds, the screen switches to the check before starting screen After the check before starting screen DD is displayed for 2 seconds, the screen switches to the working mode/ travel mode display screen HH.
Page 73 OPERATION DETAILED CONTROLS AND GAUGES REMARK When the engine is started, the battery voltage may suddenly drop depending on the temperature and the battery condition. If this happens, the display on the machine monitor may momentarily go out, but this does not indicate any abnormality.
Page 74 OPERATION DETAILED CONTROLS AND GAUGES If There Is Abnormality When Starting Engine If there is any abnormality when starting the engine, the check before starting screen DD changes to the main- tenance interval warning screen CC, warning screen FF, or error screen EE. After displaying the check before starting screen DD for 2 seconds, the screen changes to the maintenance interval warning screen CC.
Page 75 OPERATION DETAILED CONTROLS AND GAUGES If Any Abnormality Occurs During Operation If any abnormality occurs during operation, the standard screen BB changes to warning screen FF-(1) or the error screen EE. After displaying warning screen FF-(1) for 2 seconds, the screen automatically changes to warning screen FF- (2).
Page 76 OPERATION DETAILED CONTROLS AND GAUGES REMARK The colors lighting up the monitors related to the emergency stop items, caution items, and basic check items are as follows. AA: Screen for standard BB: Screen with all lamps lighted up CC: Maintenance time warning screen Color when monitor lights up Type of monitor When...
Page 77: Emergency Monitors
OPERATION DETAILED CONTROLS AND GAUGES Emergency Monitors CAUTION If the monitor lights up red, stop the engine immediately or run at low idle, check applicable location, then perform necessary actions. These items should be observed while the engine is running. If there is a problem, the monitor for the abnormal location lights up red and buzzer sounds, perform action immediately.
Page 78 OPERATION DETAILED CONTROLS AND GAUGES Hydraulic Oil Temperature Monitor This monitor (2) warns the operator that the hydraulic oil tem- perature has risen. If the hydraulic oil temperature becomes abnormally high, abnormality display (C) is shown. Stop operations and stop the engine or run it at low idling until the monitor changes to normal display (B).
Page 79: Caution Monitors
OPERATION DETAILED CONTROLS AND GAUGES Caution Monitors CAUTION If the warning monitor lights up red, stop operations as soon as possible and perform inspection and maintenance of the applicable location. If the warning is ignored, it may lead to failure. These are items that should be observed while the engine is running.
Page 80 OPERATION DETAILED CONTROLS AND GAUGES Hydraulic Oil Temperature Monitor If this monitor (2) shows low-temperature display (A), carry out the warm-up operation. For details, see “Hydraulic Equipment Warm Up (3-133)“. Carry out the warm-up operation for the hydraulic equipment until monitor (2) shows normal display (B). Display (A) at low temperatures: Monitor background (D) is white Display (B) at correct temperatures: Monitor background (D) is...
Page 81 OPERATION DETAILED CONTROLS AND GAUGES OVERLOAD CAUTION (When lifting) This monitor (7) warns that the machine is close to tipping due to the load (an audible warning is also given), if the warning is given, lower the load. Refer the lifting capacity chart for safe load.
Page 82: Basic Check Monitors
OPERATION DETAILED CONTROLS AND GAUGES Basic Check Monitors CAUTION These monitors do not guarantee the condition of the machine. Do not simply rely on the monitor when carrying out checks before starting (daily inspection). Always get off the machine and check each item directly. Displays basic items among the check before starting items that must be checked before starting the engine.
Page 83 REMARK For details of the method of confirming the maintenance inter- val, see “Maintenance Selector Switch (3-39)“. If it is desired to change settings for the maintenance interval, have your Komatsu distributor change the settings. 3-17...
Page 84: Meter Display Portion
OPERATION DETAILED CONTROLS AND GAUGES Meter Display Portion Pilot display Gauge and Meter Engine pre-heating monitor (10) Engine coolant temperature gauge Swing lock monitor (11) Hydraulic oil temperature gauge Wiper monitor (12) Fuel gauge Auto-deceleration monitor (13) Service meter, clock Working mode monitor (14) ECO gauge Travel speed monitor...
Page 85 OPERATION DETAILED CONTROLS AND GAUGES Swing Lock Monitor This monitor (2) informs the operator that the swing lock is being actuated. Actuated: Lights up When the swing lock switch is turned ON (ACTUATED), the monitor lamp lights up. This lamp lights up when the swing parking brake release switch is set to the FREE position.
Page 86 OPERATION DETAILED CONTROLS AND GAUGES Working Mode Monitor This monitor (5) displays the setting of the working mode. The monitor display is as follows according to the operation of the working mode switch. P: P mode (for heavy-load operations) E: E mode (for operations with emphasis on fuel consumption) L: L mode (for fine control operations) B: B mode (for breaker operations) ATT: ATT mode (for crusher operations)
Page 87 OPERATION DETAILED CONTROLS AND GAUGES Air Conditioner Monitor This monitor (8) displays the working status of the air condi- tioner. Monitor lighted up: Air conditioner ON Monitor off: Air conditioner OFF Idle Stop Guidance If the levers are not operated for more than five minutes, and the engine is idling, the idling stop message is displayed on the monitor.
Page 88 OPERATION DETAILED CONTROLS AND GAUGES Display (G) at low temperatures: Monitor background (K) is white Display (H) at correct temperatures: Monitor background (K) is blue Display (J) when condition is abnormal: Monitor background (K) is red Hydraulic Oil Temperature Gauge This meter (11) shows the hydraulic oil temperature.
Page 89 OPERATION DETAILED CONTROLS AND GAUGES Fuel Gauge This meter (12) shows the amount of fuel remaining in the fuel tank. During normal operations, the indicator should be in the green range. If the indicator starts to enter red range (A) during operation, there is less than 110 liters of fuel remaining, so carry out inspection and add fuel.
Page 90 OPERATION DETAILED CONTROLS AND GAUGES When the standard screen is being displayed, if function switch F4 is pressed, it is possible to switch between the clock display and the service meter display. Clock display (12-hour or 24-hour displays are available) To set or correct the time, press function switch F6 (user mode switch).
Page 91: Monitor Switches Portion
OPERATION DETAILED CONTROLS AND GAUGES Monitor Switches Portion Working mode selector switch Window washer switch Auto-deceleration switch Buzzer cancel switch Travel speed selector switch Function switches Wiper switch Air conditioner switch Working Mode Selector Switch Use this switch (1) to set the movement or power of the work equipment.
Page 92 If you press F5 (No), the system starts up in E mode. If you want to have automatic setting of the P, E, L, B or ATT mode when starting (optional default setting), please ask your Komatsu distributor to change the setting. Procedure for operation 1.
Page 93 OPERATION DETAILED CONTROLS AND GAUGES 3. After selecting the desired mode, press function switch F6 and the mode is displayed in the center of the monitor dis- play. (Example: If power mode is selected: P) 4. After two seconds, the pilot monitor display at the top right of the screen is highlighted in orange.
Page 94 OPERATION DETAILED CONTROLS AND GAUGES Auto-deceleration Switch If the control levers are at neutral, this switch (2) automatically lowers the engine speed and turns on the function to reduce fuel consumption. Auto-deceleration monitor ON: Auto-deceleration ON Auto-deceleration monitor OFF: Auto-deceleration OFF Each time the switch is pressed, the auto-deceleration is switched between ON and OFF.
Page 95 OPERATION DETAILED CONTROLS AND GAUGES Travel Speed Selector Switch WARNING When loading or unloading from a trailer, always travel at low speed (with travel speed selector switch (3) at the Lo position). Never operate travel speed selector switch (3) while loading or unloading. If the travel speed is switched between Hi and Lo when the machine is traveling, the machine may deviate to one side, even when traveling in a straight line.
Page 96 OPERATION DETAILED CONTROLS AND GAUGES Wiper Switch This switch (4) actuates the front window wiper. Each time the switch is pressed, it changes ON → INT → stop (OFF). Wiper monitor INT lighted up: Wiper operates intermittently Wiper monitor ON lighted up: Wiper operates continuously Wiper monitor OFF: Wiper stops REMARK Each time wiper switch (4) is pressed, the mode is displayed in...
Page 97 OPERATION DETAILED CONTROLS AND GAUGES Window Washer Switch This switch (5) is kept continuously pressed, window washer fluid is sprayed out on the front glass. When the switch is released, the spray stops. If switch (5) is kept pressed when the wiper is stopped, the window washer fluid will spray, and at the same time, the wiper will be actuated continuously.
Page 98 OPERATION DETAILED CONTROLS AND GAUGES Function Switches Function switches (7) consist of 6 switches (F1 to F6). The function of each switch differs according to the content of each screen. When the monitor display shows the standard screen, the func- tions are displayed as follows.
Page 99: Handling Function Switches
F3 is not displayed. Even if switch F3 is pressed, the screen will not switch to the camera screen display. A maximum of three cameras can be installed. If you want to install a camera, please consult your Komatsu distributor. 3-33...
Page 100 OPERATION DETAILED CONTROLS AND GAUGES Operations on Camera 1 Image Display Screen The following explanation describes the method of operation when it is desired to display only one camera screen on the monitor. On the standard screen, if switch F3 is pressed, the image display screen is displayed.
Page 101 OPERATION DETAILED CONTROLS AND GAUGES Operation of Image Display Screen When Two Camera Screens are Shown Simultaneously. The following explanation describes the method of operation when it is desired to display two camera screens at the same time on the monitor. On the No.
Page 102 OPERATION DETAILED CONTROLS AND GAUGES It is possible to change the working mode by pressing the working mode selector switch. For details of the working mode selector switch, see “Work- ing Mode Selector Switch (3-25)“. If the working mode is changed, the screen returns to the stan- dard screen.
Page 103 OPERATION DETAILED CONTROLS AND GAUGES It is possible to press the buzzer cancel switch to stop the alarm buzzer for the warning item where there is an abnor- mality. Even if the buzzer cancel switch is pressed, the camera image display screen does not switch to another screen. Press the wiper switch and washer switch to operate the wipers and washer.
Page 104 OPERATION DETAILED CONTROLS AND GAUGES If an error monitor is displayed, move the machine, set it in a safe posture, then have inspection carried out immediately. For details of the content of the warning displays, see “Basic Check Monitors (3-16)“, “Caution Monitors (3-13)“, “Emergency Monitors (3-11)“...
Page 105 OPERATION DETAILED CONTROLS AND GAUGES Maintenance Selector Switch When switch F5 is pressed on the standard screen, the monitor display screen switches to the maintenance mode screen. The items on the maintenance display are as follows. Engine oil change Engine oil filter change Fuel main filter change 1000 Fuel pre-filter change...
Page 106 If the time remaining until maintenance becomes 0 hours, the remaining time dis- play is highlighted in red. If you want to change the setting for the maintenance inter- val, please consult your Komatsu distributor. 3-40...
Page 107 OPERATION DETAILED CONTROLS AND GAUGES Operations on Maintenance Interval Reset Screen On the maintenance list screen, if switch F6 is kept pressed for at least 1.5 seconds, the screen changes to the maintenance time reset screen. Reset the remaining time on this screen. 1.
Page 108 OPERATION DETAILED CONTROLS AND GAUGES User Mode Selector Switch When the switch F6 is pressed, the monitor display screen switches to the setting mode screen for the machine. On the User Menu screen, it is possible to carry out the fol- lowing operations with switches F3 to F6.
Page 109 OPERATION DETAILED CONTROLS AND GAUGES The following items can be set. a: Breaker/attachment setting (machines ready for installation of attachment) b: Message display (machines equipped with KOMTRAX) c: Screen adjustment d: Clock adjustment e: Language selection f: Economy mode adjustment The operation for setting a to f is as follows.
Page 110 OPERATION DETAILED CONTROLS AND GAUGES Breaker/Attachment 1 Setting On machines ready for attachment, it is possible on the breaker/attachment setting menu to adjust the oil flow in B mode and ATT mode to match the attachment. For machines that have no attachment, the breaker/attach- ment setting mode is not displayed.
Page 111 OPERATION DETAILED CONTROLS AND GAUGES 3. On the working mode selection screen shown on the right, select B Breaker and press switch F6. On the working mode selection screen shown on the right, it is possible to carry out the following operations with switches F3 to F6.
Page 112 OPERATION DETAILED CONTROLS AND GAUGES On the Breaker Select Menu screen, it is possible to carry out the following operations with switches F3 - F6. F3: Moves to next item (1 line down). F4: Moves to previous item (1 line up). F5: Returns to previous screen.
Page 113 OPERATION DETAILED CONTROLS AND GAUGES On the Breaker Select Menu and breaker setting selection menu, it is possible to carry out the following operations with switches F3 - F6. F3: Moves to next item (1 line down). F4: Moves to previous item (1 line up). F5: Returns to previous screen.
Page 114 OPERATION DETAILED CONTROLS AND GAUGES On the Breaker Select Menu and Breaker Oil Flow Setting screen, it is possible to carry out the following operations with switches F3 - F6. F3: Moves to next item (1 line down). F4: Moves to previous item (1 line up). F5: Returns to previous screen.
Page 115 OPERATION DETAILED CONTROLS AND GAUGES Changing Attachment Mode Setting 1. On the standard screen, press switch F6. 2. Select Breaker/Attachment Settings on the user menu, then press switch F6. Screen for machine with 1 Attachment Line Screen for machine with 2 Attachment Lines 3-49...
Page 116 OPERATION DETAILED CONTROLS AND GAUGES 3. On the working mode selection screen shown on the right, select ATT 2-Way Attachment, then press switch F6. On the working mode selection screen shown on the right, it is possible to carry out the following operations with switches F3 to F6.
Page 117 OPERATION DETAILED CONTROLS AND GAUGES On the 2-Way Attachment Select Menu screen, it is possible to carry out the following operations with switches F3 - F6. F3: Moves to next item (1 line down). F4: Moves to previous item (1 line up). F5: Returns to previous screen.
Page 118 OPERATION DETAILED CONTROLS AND GAUGES 2. On the 2-Way Attachment Select Menu, select one of the two set values for the oil flow, then press switch F6. The default values for the oil flow setting are both set to 550 liters/min, as shown in the illustration on the right.
Page 119 OPERATION DETAILED CONTROLS AND GAUGES Changing attachment flow setting 1. Select 2-Way Attachment Oil Flow Setting (b) on the 2-Way Attachment Select menu screen, then press switch F6. 2. On the 2-Way Attachment Select Oil Flow Setting screen, select one of the two set values for the oil flow, then press switch F6.
Page 120: Attachment 2 Setting
OPERATION DETAILED CONTROLS AND GAUGES 3. On the 2-Way Attachment Oil Flow Setting menu, it is pos- sible to change the oil flow setting. After using switches F3 or F4 to change to a suitable oil flow, press switch F6 to accept the change in the oil flow and return to the previous screen.
Page 121 OPERATION DETAILED CONTROLS AND GAUGES On the 2-Way Attachment Select Menu screen, it is possible to carry out the following operations with switches F3 - F6. F3: Moves to next item (1 line down). F4: Moves to previous item (1 line up). F5: Returns to user menu screen.
Page 122 OPERATION DETAILED CONTROLS AND GAUGES Changing attachment 2 flow setting 1. Select 2-Way Attachment Oil Flow Setting (b) on the 2-Way Attachment Select menu screen, then press switch F6. 2. On the 2-Way Attachment Select Oil Flow Setting screen, select one of the two set values for the oil flow, then press switch F6.
Page 123 OPERATION DETAILED CONTROLS AND GAUGES 3. On the 2-Way Attachment Oil Flow Setting menu, it is pos- sible to change the oil flow setting. After using switches F3 or F4 to change to a suitable oil flow, press switch F6 to accept the change in the oil flow and return to the previous screen.
Page 124 DETAILED CONTROLS AND GAUGES Message Display (Machines equipped with KOMTRAX) On machines equipped with KOMTRAX, it is possible to see the messages from your Komatsu distributor on this message display menu. REMARK At present, there is no territory where it is possible to the use the message service.
Page 125 OPERATION DETAILED CONTROLS AND GAUGES Adjusting Screen Use this screen adjustment menu to adjust the brightness, con- trast, and back light of the screen. 1. On the standard screen, press switch F6. 2. Select screen adjustment on the user menu, then press switch F6.
Page 126 OPERATION DETAILED CONTROLS AND GAUGES 3. Select item to be adjusted (a) or (b) from the selection menu screen for screen adjustment, then press switch F6. The screen switches to the setting screen for the selected item. (a): Standard screen adjustment (b): Camera screen adjustment On the mode selection screen shown on the right, it is possible to carry out the following operations with...
Page 127 OPERATION DETAILED CONTROLS AND GAUGES On the screen for Items 1) and 2), it is possible to carry out the following operations with switches F2 to F6. F2: Resets all adjusted values to default value F3: Indicator of selected item moves 1 segment to left. F4: Indicator of selected item moves 1 segment to right.
Page 128 OPERATION DETAILED CONTROLS AND GAUGES 1. On the standard screen, press switch F6. 2. Select “Clock Adjustment“ on the user menu, then press switch F6. The screen switches to the time adjustment selection menu screen. The following three items can be changed. (a) Clock setting (b) 12/24 hour display mode (c) Daylight saving time...
Page 129 OPERATION DETAILED CONTROLS AND GAUGES Time Adjust the hour setting. 1) If “Time“ (a) is not highlighted in yellow, press switch F6 to highlight “Time“ (a) in yellow. When this is done, hour dis- play (b) changes to orange. Adjust hour display (b) with the switches as follows. If it is not necessary to change the hour setting, press switch F6.
Page 130 OPERATION DETAILED CONTROLS AND GAUGES 12h/24h Mode Choose either a 12-hour display (am/pm) or a 24-hour dis- play. (b): 24-hour display (c): 12-hour display (am/pm) 1) If “12h/24h Mode“ (a) is not highlighted in yellow, press switch F6 to highlight “12h/24h Mode“ (a) in yellow. 2) Change the “12h/24h mode“...
Page 131 OPERATION DETAILED CONTROLS AND GAUGES Daylight Saving Time (Summer time) 1) If daylight saving time is turned ON (a), the clock display becomes 1 hour earlier. If daylight saving time is turned OFF (b), the clock display returns to the set time. The selected display mode is highlighted in green.
Page 132 OPERATION DETAILED CONTROLS AND GAUGES 2. Select “Language“ on the user menu, then press switch F6. The screen switches to the language selection menu screen. 3. Select the language to use for the display, then press switch F6. The screen display changes to the selected lan- guage.
Page 133 OPERATION DETAILED CONTROLS AND GAUGES Adjusting Economy Mode With this economy mode, the engine output can be adjusted to improve the fuel consumption in E mode. 1. On the standard screen, press switch F6. 2. Select “Economy Mode Adjustment“ on the user menu, then press switch F6.
Page 134 OPERATION DETAILED CONTROLS AND GAUGES 3. Select the desired E mode from the economy mode adjust- ment selection menu. The levels that can be set are as follows. E0: Default E1: Economy Adjustment 1 E2: Economy Adjustment 2 E3: Economy Adjustment 3 The higher the selection is made from E0 to E3, the better the fuel consumption becomes, but the produc- tion is reduced accordingly.
Page 135: Switches
OPERATION DETAILED CONTROLS AND GAUGES SWITCHES Front of levers Starting switch (12) Cigarette lighter Fuel control dial (13) Room lamp Lamp switch (14) Emergency pump drive switch Swing lock switch (15) Swing parking brake release switch Machine push-up switch (16) Quick coupler switch Lower wiper (17) Quick coupler switch Heated seat...
Page 136 OPERATION DETAILED CONTROLS AND GAUGES Fuel Control Dial Dial (2) adjusts the engine speed and output. (a) Low idling (MIN): Turned fully to the left (b) Full speed (MAX): Turned fully to the right Lamp Switch Switch (3) is used to turn on the LH deck lamp, RH deck lamp, Boom LH lamp, Boom RH lamp (if equipped), CW lamp (if equipped) and monitor lighting.
Page 137 OPERATION DETAILED CONTROLS AND GAUGES Machine Push-up Switch This switch (5) is used to switch the safety valve set pressure at the head end of the boom cylinder to two levels. (a) Low-pressure setting: The boom thrust force is weak, so the swaying of the chassis is small during digging operations, and digging operations can be carried out smoothly.
Page 138 OPERATION DETAILED CONTROLS AND GAUGES Revolving Warning Lamp Switch (If equipped) Use this switch (8) to light up the yellow rotating lamp on top of the cab. (a) ON: Lamps light up (b) OFF: Lamps go off Horn Switch Use this switch (9) to sound the horn. Press the switch on the right work control lever to sound the horn.
Page 139 OPERATION DETAILED CONTROLS AND GAUGES Room Lamp Switch NOTICE It is possible to turn on the interior cab room lamp even when starting switch is in the OFF position, do not forget to turn it off. Use this switch (12) to light up the room lamp. (a) ON position: Lamp lights up (b) OFF position: Lamp goes out The room lamp lights up even when the starting switch is at the...
Page 140 OPERATION DETAILED CONTROLS AND GAUGES Swing Parking Brake Release Switch NOTICE This switch makes it possible to perform swing operations for a short even when there is a problem in the swing parking brake electric system. DO NOT use this switch except in emergencies. Repair the problem as soon as possible.
Page 141: Control Levers And Pedals
OPERATION DETAILED CONTROLS AND GAUGES CONTROL LEVERS AND PEDALS Lock lever Left work equipment control lever Travel levers (with auto-deceleration system) (with pedal and auto-deceleration system) Right work equipment control lever (with auto-deceleration system) Lock Lever WARNING When leaving the operator's compartment, set the lock lever securely to the LOCK position. If the lock lever is not at the LOCK position and the control levers or control pedals are touched by mistake, it may lead to serious personal injury.
Page 142 OPERATION DETAILED CONTROLS AND GAUGES Travel Levers WARNING Do not rest your foot on the pedal during operations. If the pedal is depressed by mistake, the machine may suddenly move and cause a serious accident. Be extremely careful when operating the pedal for travel or steering operations.
Page 143 OPERATION DETAILED CONTROLS AND GAUGES Right work equipment control lever (4) is used to operate the boom and bucket. Boom operation (a) RAISE (b) LOWER Bucket operation (c) DUMP (d) CURL N (Neutral) : The boom and bucket are held in position and do not move.
Page 144: Sun Roof
OPERATION DETAILED CONTROLS AND GAUGES SUN ROOF PC450, PC450LC only) WARNING When leaving the operator's seat, set the lock lever securely to the LOCK position. If the lock lever is at the FREE position and the control levers or control pedals is touched by mistake, this may lead to a serious accident.
Page 145: Windshield
OPERATION DETAILED CONTROLS AND GAUGES WINDSHIELD WARNING When opening or closing the front window, bottom window, or door, always set the lock lever to the LOCK position. If the lock lever is at the FREE position and the control levers or control pedals is touched by mistake, this may lead to a serious accident.
Page 146 OPERATION DETAILED CONTROLS AND GAUGES 4. Hold 2 grips (A) on the left and right top sides of the front window, and pull the 2 levers (B) to release the locks at the top of the front window. The top of the front window will come out.
Page 147 OPERATION DETAILED CONTROLS AND GAUGES 5. Hold lower knob (C) with your left hand from inside the operator's cab, and with your right hand, grip top knob (D), pull it up, and push it against lock catch (E) at the rear of the cab securely to lock the window.
Page 148 OPERATION DETAILED CONTROLS AND GAUGES Closing WARNING When closing the window, lower it slowly and be careful not to get your hand caught. 1. Stop the machine on level ground, lower the work equipment completely to the ground, then stop the engine. 2.
Page 149 OPERATION DETAILED CONTROLS AND GAUGES 5. When the bottom of the window reaches the top of the bot- tom window, push the top of the window to the front to push it against left and right lock catches (G) and engage the lock.
Page 150: Emergency Escape Hammer
OPERATION DETAILED CONTROLS AND GAUGES 2. After removing the lower windshield, store it at the right rear of the operator's cab, and set lever (2) to lock position (B) to hold it securely in position. 3. When removing it, set lever (2) to release position (C), hold the glass with both hands, and pull it up.
Page 151: Door Lock
OPERATION DETAILED CONTROLS AND GAUGES DOOR LOCK WARNING Before the releasing the door lock, always stop the machine on flat ground. Never release the door lock on a slope. The door may suddenly close and cause injury. When releasing the door lock, do not extend your body or hands outside the machine and do not put your hands on the door frame.
Page 152 OPERATION DETAILED CONTROLS AND GAUGES Opening and Closing Caps with Lock Opening the Cap 1. Insert the key into the key slot. 2. Turn the key clockwise, align the key groove with mark (1) on the cap, then open the cap. Position (A): OPEN Position (B): LOCK Locking the Cap...
Page 153: Drink Box
OPERATION DETAILED CONTROLS AND GAUGES DRINK BOX This is on the right side at the rear of the operator's seat. It keeps drinks and other things hot or cold. Hot or cold air blows into the box according to the setting of the air conditioner.
Page 154: Air Conditioner Controls
OPERATION DETAILED CONTROLS AND GAUGES AIR CONDITIONER CONTROLS Air Conditioner Control Panel OFF switch FRESH/RECIRC selector switch Fan switch Display monitor Temperature control switch Air conditioner switch Vent selector switch Sunlight sensor Auto switch OFF Switch Switch (1) is used to stop the fan and air conditioner. REMARK Even if this switch (1) is pressed, the monitor screen does not switch to the air conditioner adjustment screen.
Page 155 OPERATION DETAILED CONTROLS AND GAUGES Fan Switch Switch (2) is used to adjust the air flow. The air flow can be adjusted to six levels. Press the E switch to increase the air flow; press the R switch to decrease the air flow. During auto operation, the air flow is automatically adjusted.
Page 156 OPERATION DETAILED CONTROLS AND GAUGES Vent Selector Switch Switch (4) is used to select the vents. When switch (4) is pressed, the display on monitor display (7) switches and air blows out from the vents displayed. During automatic operation, the vents are automatically selected.
Page 157 OPERATION DETAILED CONTROLS AND GAUGES Auto Switch With switch (5), the air flow, vents, and air source (RECIRC/ FRESH) are automatically selected according to the set tem- perature. Press switch (5), then use temperature control switch (3) to set the temperature, and run the air conditioner under auto- matic control.
Page 158: Method Of Operation
OPERATION DETAILED CONTROLS AND GAUGES Air Conditioner Switch Switch (8) is used to turn the air conditioner (cooling, dehumid- ifying, heating) ON or OFF. Press air conditioner switch (8) when the fan is operating (when display (b) is shown on the display monitor). The air conditioner is switched ON and starts to work.
Page 159 OPERATION DETAILED CONTROLS AND GAUGES 2. Use temperature set switch (3) to set to the desired tem- perature. The air flow, combination of vents, and selection of fresh or recirculated air is automatically selected accord- ing to the set temperature, and the air conditioner is oper- ated automatically to provide the set temperature.
Page 160 OPERATION DETAILED CONTROLS AND GAUGES Manual Operation 1. Press fan switch (2) and adjust the air flow. When doing this, check that temperature setting (a) and air flow (b) are displayed on monitor (7). 2. Turn air conditioner switch (8) ON. 3.
Page 161 OPERATION DETAILED CONTROLS AND GAUGES 4. Press vent selector switch (4) and select the desired vents. When this is done, the display for vent (c) of the display monitor changes according to the selection. 5. Press RECIRC/FRESH selector switch (6) and select recir- culation of the air inside the cab (RECIRC) or intake of fresh air from outside (FRESH).
Page 162 OPERATION DETAILED CONTROLS AND GAUGES Operation with Cold Air to Face and Warm Air to Feet To operate with cold air blowing to the face and warm air blow- ing to the feet, set as follows. 1. Press fan switch (2) and adjust the air flow. When doing this, check that temperature setting (a) and air flow (b) are displayed on monitor (7).
Page 163 OPERATION DETAILED CONTROLS AND GAUGES Defroster Operation 1. Press fan switch (2) and adjust the air flow. When doing this, check that temperature setting (a) and air flow (b) are displayed on monitor (7). 2. Press vent selector switch (4) and set vent display on the display monitor to (f) or (g) as shown in diagram on the right.
Page 164: Use Air Conditioner With Care
OPERATION DETAILED CONTROLS AND GAUGES 4. Press temperature setting switch (3) and set temperature on the display (7) monitor to maximum heating. 5. Adjust vents (A), (B1), and (B2) so that the air blows onto the window glass. (Vents (C) and (D) are fixed and cannot be adjusted.) When operating in the rainy season or when it is desired to remove the mist from the window glass or to dehumidify the air, turn air conditioner switch (8) ON.
Page 165: Inspection And Maintenance Of Air Conditioner Equipped Machine
If any abnormality is detected in any equipment or sensor used on the air conditioner, “A/C Controller Error“ is dis- played on the air conditioner monitor screen. If “A/C Con- troller Error“ is displayed, please ask your Komatsu distributor to carry out inspection and repair. 3-99...
Page 166: Radio
OPERATION DETAILED CONTROLS AND GAUGES RADIO Control Panel AS/PS button Power switch, Volume control knob, Balance con- trol knob Preset station buttons (1,2,3,4,5,6) SEL button Display FM/AM selection button Time reset button Display selection button Tuning button Power switch, Volume control knob, Balance control knob Press this knob (1) to turn the power for the radio on.
Page 167 OPERATION DETAILED CONTROLS AND GAUGES Display Selection Button (TIME) On this machine, priority is given to the frequency display. When the frequency is being displayed, press button (4) and the display will show the present time for 5 seconds. After 5 seconds pass, the display returns automati- cally to the frequency display.
Page 168: Controls Of Radio
OPERATION DETAILED CONTROLS AND GAUGES Controls of Radio Method of Setting with Preset Button 1. Press power switch (1) and display the frequency on dis- play (7). 2. Use tuning button (9) to set to the desired frequency. There are two methods for tuning: auto tuning and manual tuning. 3.
Page 169 OPERATION DETAILED CONTROLS AND GAUGES Method of Operating Mode (BAS) Bass adjustment: When button (2) is pressed, BAS is displayed on display (7). If knob (1) is turned clock- wise within 5 seconds, the bass sound is emphasized. If the knob is turned counterclockwise, the bass sound is reduced.
Page 170: Use Radio With Care
OPERATION DETAILED CONTROLS AND GAUGES Antenna Before transporting the machine putting it inside a building, stored the antenna to prevent any interference. Stow the antenna as follows. 1. Loosen antenna mounting bolt (1) and store the antenna at position (A). 2.
Page 171: Auxiliary Electric Power
OPERATION DETAILED CONTROLS AND GAUGES AUXILIARY ELECTRIC POWER 24V Power Source NOTICE Do not use this as the power supply for 12V equipment. It will cause failure of the equipment. Pull out the connector plug for taking out electric power from the rear side of the panel.
Page 172: Fuse
OPERATION DETAILED CONTROLS AND GAUGES FUSE NOTICE Before replacing a fuse, be sure to turn off the starting switch. The fuse holder is at the rear right of the operator's seat. The fuses protect the electrical equipment and wiring from burning out.
Page 173: Fusible Link
The engine controller has been given moisture prevention treatment, so there is no problem if rain gets on it, but do not spray it with water when washing the machine. If any abnormality occurs in the controller, do not disassemble it yourself. Contact your Komatsu dis- tributor for repairs.
Page 174: Tool Box
OPERATION DETAILED CONTROLS AND GAUGES TOOL BOX Store the tools in this box. This is inside of the battery box cover on the right side of the machine. NOTICE When putting large objects in the toolbox, make sure that they do not contact the battery. This may cause damage to the battery.
Page 175: Refuelling Pump
OPERATION DETAILED CONTROLS AND GAUGES REFUELLING PUMP WARNING Do not bring fire or sparks near the fuel. 1. When the machine is operated on sites with no fuel con- tainer and pump, the machine may be refuelled using the refuelling pump (if fitted) from fuel barrels. The refuelling pump is located under the air cleaner at the right hand side of the machine.
Page 176: Accumulator
Do not make holes in it or weld it. Do not hit it, roll it, or subject it to any impact. When disposing of the accumulator, the gas must be released. Please contact your Komatsu distributor to have this work carried out.
Page 177: Machine Operations And Controls
Leakage of fuel or oil will cause the machine to catch fire. Check carefully, be sure to repair any problem, or contact your Komatsu distributor. Perform the following inspections and cleaning every day before starting engine for the day's work.
Page 178: Checks Before Starting
Check for damage or wear to the seat belt and mounting clamps. If there is any damage, replace with new parts. 10. Check bucket with hook (if equipped) for damage. Check for damage to the hook, guide, and hook mount. If any problem is found, contact your Komatsu distrib- utor for repairs. 11. Check, clean rear-view monitor Check that there is no problem with the rear-view monitor.
Page 179 OPERATION MACHINE OPERATIONS AND CONTROLS Check Oil Level in Hydraulic Tank, Add Oil WARNING The parts and oil are at high temperature immediately after the engine is stopped, and may cause burns. Wait for the temperature to go down before starting the work. When removing the oil filler cap, turn it slowly to release the internal pressure, then remove it.
Page 180 OPERATION MACHINE OPERATIONS AND CONTROLS Check Oil Level in Engine Oil Pan, Add Oil WARNING Parts and oil are at high temperature immediately after the engine is stopped and may cause serious burns. Wait for the oil temperature to go down before performing this operation. 1.
Page 181 OPERATION MACHINE OPERATIONS AND CONTROLS Check for Water and Sediment in Water Separator, Drain Water 1. Open the front engine hood. 2. The water separator forms one unit with fuel pre-filter (1). 3. It is possible to judge the water level and amount of sedi- ment by looking through transparent cap (2).
Page 182 OPERATION MACHINE OPERATIONS AND CONTROLS Check Coolant Level, Add Coolant WARNING Do not open the radiator cap unless necessary. When checking the coolant, always wait for the engine to cool down and check the sub tank. Immediately after the engine is stopped, the coolant is at a high temperature and the radiator is under high internal pressure.
Page 183 If fuses are frequently blown or if there are traces of short-circuiting on the electrical wiring, promptly ask your Komatsu distributor to locate the cause and make the repair. Keep the top surface of the battery clean and check the breather hole in the battery cap. If it is clogged with dirt or dust, wash the battery cap to clear the breather hole.
Page 184 Check that the working lamps and lamps inside the instruments light up properly. Check also that there is no dirt or damage. If any lamp does not light up, the bulb is probably blown up or there is a disconnection, so ask your Komatsu dis- tributor to carry out repairs.
Page 185: Adjustment
Check Function of Horn 1. Turn the starting switch to the ON position. 2. Confirm that the horn sounds immediately when the horn button is pressed. If the horn does not sound, contact your Komatsu distribu- tor for repair. Adjustment Seat Adjustment...
Page 186 OPERATION MACHINE OPERATIONS AND CONTROLS Forward tilt Push lever (3) down to adjust angle of the front of seat. (4 stages) To raise the angle at front of the seat, keep the lever pushed down and apply your weight to the rear of seat. To lower the angle at front of the seat, keep the lever pushed down and apply your weight to the front of seat.
Page 187 OPERATION MACHINE OPERATIONS AND CONTROLS (G) Adjusting suspension (air suspension seat (if equipped)) Push switch (9) to make the suspension harder. Pull switch (9) to release the air and make the suspension softer. (The sound of air being released can be heard.) Range of adjustment for operator's weight: 60-150 kg (H) Heated seat Turn the heated seat switch ON to warm the seat cushion and the seat back.
Page 188 OPERATION MACHINE OPERATIONS AND CONTROLS 4. Loosen mounting bolt (4) of the camera and adjust mount- ing angle (A) of the camera so that the center line of mounting bolt (4) is aligned with fourth-from-bottom scale (B). REMARK Part of the machine is shown on the monitor screen. 5.
Page 189 OPERATION MACHINE OPERATIONS AND CONTROLS Mirror (A) Adjust the mirror mount so that it is possible to see people at the rear left of the machine. Install the side view mirror in the location indicated in the fig- ure at right. (L): 60 mm Fix mirror securing stay (1) the way the side view mirror stretches outward to the maximum.
Page 190 OPERATION MACHINE OPERATIONS AND CONTROLS Mirrors (C), (D) (If equipped) Adjust the side view mirrors so that people around 1 m away from the machine can be seen. (W): 1 m If side view mirror (C), (D) does not move smoothly when adjusting its angle, loosen mirror securing screw (6).
Page 191: Seat Belt
OPERATION MACHINE OPERATIONS AND CONTROLS Seat Belt WARNING Before fitting the seat belt, check that there is no problem in the belt mount bracket or mounting belt. If it is worn or damaged, replace the seat belt. Even if no problem can be seen in the belt, replace the seat belt every 3 years. The date of manufac- ture of the belt is shown on the back of the belt.
Page 192: Operations Before Starting Engine
OPERATION MACHINE OPERATIONS AND CONTROLS Operations Before Starting Engine WARNING When starting the engine, check that the lock lever is securely at the LOCK position. If the lock lever is not locked securely and the control levers or control pedal are touched when the engine is started, the machine may move unexpectedly, and this may lead to serious personal injury.
Page 193 If any monitor does not light up or the buzzer does not sound, there is probably a failure in the monitor, so please contact your Komatsu distributor for repairs. 2) After approx. 2 seconds, the screen will change to the working mode/travel speed display monitor.
Page 194: Starting Engine
OPERATION MACHINE OPERATIONS AND CONTROLS STARTING ENGINE WARNING Start the engine only after sitting down in the operator's seat. Do not attempt to start the engine by short-circuiting the engine starting circuit. Such an act may cause a serious bodily injury or fire. Check that there are no persons or obstacles in the surrounding area, then sound the horn and start the engine.
Page 195 OPERATION MACHINE OPERATIONS AND CONTROLS 2. Set fuel control dial (2) to the low idling (MIN) position. 3. Turn the key in starting switch (3) to ON position (B). If the ambient temperature is low, the preheating monitor lights up and automatic preheating is carried out. Keep the key in starting switch (3) at the ON position until the pre- heating monitor goes out.
Page 196 OPERATION MACHINE OPERATIONS AND CONTROLS 6. Even if the engine starts, wait for the engine oil pressure monitor to go out. Do not touch the control levers or con- trol pedal while the engine oil pressure monitor is lighted NOTICE If the engine oil pressure monitor does not go out even after 4 to 5 seconds have passed, stop the engine immedi- ately.
Page 197: After Starting Engine
OPERATION MACHINE OPERATIONS AND CONTROLS AFTER STARTING ENGINE WARNING To stop the engine in emergencies or when the actua- tion of the engine is abnormal or there is any other trouble, turn the key in the starting switch to the OFF position.
Page 198 OPERATION MACHINE OPERATIONS AND CONTROLS 1. This machine is equipped with an automatic engine warm-up system, so if the engine water temperature is below 30 °C after the engine is started, the engine warm-up operation starts automatically. When the engine automatic warm-up operation starts, the engine speed is maintained at a speed higher than the normal low idling speed.
Page 199: Hydraulic Equipment Warm Up
OPERATION MACHINE OPERATIONS AND CONTROLS 1) Turn fuel control dial (2) to the full speed (MAX) position and hold it for 3 seconds. 2) When fuel control dial (2) is returned to the low idle (MIN) position, the engine speed will drop. Hydraulic Equipment Warm Up WARNING Before carrying out the warming-up operation for the...
Page 200 OPERATION MACHINE OPERATIONS AND CONTROLS 1. Check that engine coolant temperature monitor (1) dis- plays the correct temperature. (A) Display when temperature is correct: Monitor back- ground (C) is blue (B) Display when temperature is low: Monitor background (C) is white If it displays low temperature, carry out additional warm up of the engine until engine coolant temperature monitor (1) displays the correct temperature.
Page 201 OPERATION MACHINE OPERATIONS AND CONTROLS 5. Turn fuel control dial (4) to a point midway between low idling (MIN) and full speed (MAX). NOTICE When the work equipment is retracted, take care that it does not interfere with the machine body or ground. 6.
Page 202 Fuel level monitor (17): Display is correct level 14. Check for abnormal exhaust gas color, noise, or vibration. If any problem is found, contact your Komatsu distributor. In cold temperatures (ambient temperature below 0 °C, even when the hydraulic oil temperature monitor displays the correct temperature, carry out additional Step 15 to warm up all the hydraulic equipment.
Page 203 OPERATION MACHINE OPERATIONS AND CONTROLS 15. Turn fuel control dial (4) to the full speed (MAX) position, repeat Steps 6 to 9 for 3 to 5 minutes, then check again that the hydraulic oil temperature monitor is displaying the correct temperature. If it is not displaying the correct temperature, repeat Steps 6 to 9 for 3 to 5 minutes until hydraulic oil temperature monitor (7) displays the correct temperature.
Page 204 OPERATION MACHINE OPERATIONS AND CONTROLS FORWARD (A) ←→ REVERSE (B) Travel (Lo) operation For attachment operations (if equipped), change the working mode to the attachment mode. One way (A) ←→ Other way (B) Attachment operation 18. Check that hydraulic oil temperature monitor (7) is display- ing the correct temperature.
Page 205: Operation After Completion Of Warm-Up Operation
OPERATION MACHINE OPERATIONS AND CONTROLS Operation After Completion Of Warm-Up Operation 1. Check that hydraulic oil temperature monitor (7) displays the correct temperature. (A) Display when temperature is correct: Monitor back- ground (C) is blue (B) Display when temperature is low: Monitor back- ground (C) is white 2.
Page 206 OPERATION MACHINE OPERATIONS AND CONTROLS 3) L mode For operations requiring fine control 4) B mode For breaker operations 5) ATT mode For operations with crusher or other double-acting action attachment 3-140...
Page 207: Stopping The Engine
OPERATION MACHINE OPERATIONS AND CONTROLS STOPPING THE ENGINE NOTICE If the engine is stopped abruptly, service life of component parts of the engine may be considerably reduced. Do not stop the engine abruptly except in an emergency. If the engine has overheated, do not try to stop it abruptly but run it at medium speed to allow it to cool down gradually, and then stop it.
Page 208: Machine Operation
OPERATION MACHINE OPERATIONS AND CONTROLS MACHINE OPERATION WARNING Before operating the travel levers or travel pedals, check the direction of the track frame. If the track frame is facing the rear (if the sprocket is at the front), the machine moves in the opposite direction from the operation of the travel levers or travel pedals (front and rear travel is reversed, left and right steering is reversed).
Page 209: Moving Machine Forward
Start the machine either by pulling lever (5) back slowly or by stepping on the rear part of pedal (6) slowly. 3. Check that the travel alarm sounds properly. If the travel alarm does not sound, please contact your Komatsu distributor for repair.
Page 210: Moving Machine Backward
Slowly push the levers (5) forward, or slowly depress the front part of the pedals (6) to move the machine backward. 3. Check that the travel alarm sounds properly. If the travel alarm does not sound, please contact your Komatsu distributor for repair.
Page 211: Stopping Machine
OPERATION MACHINE OPERATIONS AND CONTROLS Stopping Machine Avoid stopping suddenly. Give yourself ample room when stopping. 1. Put the left and right travel levers (1) in the neutral position, then stop the machine. 3-145...
Page 212: Steering The Machine
OPERATION MACHINE OPERATIONS AND CONTROLS STEERING THE MACHINE Steering WARNING Before operating the travel levers or travel pedals, check the direction that the track frame is facing (the position of the sprocket). When the sprocket is at the front, the direction of operation of the travel levers or control pedals is the opposite from the direction of movement of the machine.
Page 213 OPERATION MACHINE OPERATIONS AND CONTROLS Changing Direction of the Machine When turning to the left: If the left travel lever is returned to the neutral position, the machine will turn to the left. (A): Forward left turn (B): Reverse left turn REMARK When turning to the right, operate the right travel lever in the same way.
Page 214: Swinging
OPERATION MACHINE OPERATIONS AND CONTROLS SWINGING WARNING The tail of the machine extends outside the tracks. Before operating the swing, check that the area around the machine is safe. If the lever is operated when the engine speed has been lowered by the auto-deceleration function, the engine speed will suddenly rise, operate the levers carefully.
Page 215: Work Equipment Controls And Operations
OPERATION MACHINE OPERATIONS AND CONTROLS WORK EQUIPMENT CONTROLS AND OPERATIONS WARNING If the lever is operated when the engine speed has been lowered by the auto-deceleration function, the engine speed will suddenly rise, operate the levers carefully. Use the control levers to operate the work equipment. Note that when the levers are released, they return to the HOLD position and the work equipment is held in that position.
Page 216 OPERATION MACHINE OPERATIONS AND CONTROLS Bucket control Move the right work equipment control lever to the left or right to operate the bucket. If the work equipment control levers are returned to the neutral position when the machine is stopped, even if the fuel control dial is set to FULL, the auto-deceleration mechanism will act to reduce the engine speed to a mid- range speed.
Page 217: Working Mode
OPERATION MACHINE OPERATIONS AND CONTROLS WORKING MODE Working Mode Use working mode selector switch (1) to select the working mode that matches the operating conditions or pur- pose. This will make it possible to carry out operations efficiently. Use the following procedure to select the most efficient working mode. When the starting switch is turned ON, the working mode is set to the mode that was in operation when the starting switch was last turned OFF.
Page 218 OPERATION MACHINE OPERATIONS AND CONTROLS 2. Press switches F3 or F4 at the bottom of the screen or the working mode selector switch to select the appropriate mode. 3. After selecting the desired mode, press switch F6 to accept the change. The screen returns to the standard screen. If switch F5 is pressed, the screen returns to the standard screen without changing the mode.
Page 219: Prohibited Operations
OPERATION MACHINE OPERATIONS AND CONTROLS PROHIBITED OPERATIONS WARNING If it is necessary to operate the work equipment control lever when the machine is traveling, stop the machine, then operate the control lever. If any lever is operated when the auto-deceleration is being actuated, the engine speed will suddenly increase, so be careful when operating.
Page 220 OPERATION MACHINE OPERATIONS AND CONTROLS Operations Using Bucket Dropping Force Do not use the dropping force of the machine for digging, or use the dropping force of the bucket as s pickaxe, breaker, or pile driver. This will drastically reduce the life of the machine. Operations Using Bucket as Lever Do not use the bucket to lever rocks out.
Page 221 OPERATION MACHINE OPERATIONS AND CONTROLS Operations Digging at an Angle without Engaging Teeth Do not swing the upper structure when digging hard rock at a position higher than the machine if the bucket teeth will not penetrate the rock. The teeth will slip on the rock surface and generate excessive vibration of the machine, and this will lead to cracking of the work equipment or frame.
Page 222 OPERATION MACHINE OPERATIONS AND CONTROLS Swinging or Traveling When Rock Is on Top of Track Assembly Do not swing the upper structure or travel if there is in the rock on top of the track assembly. It will contact the undercover or frame and cause damage.
Page 223: General Operation Information
OPERATION MACHINE OPERATIONS AND CONTROLS Long-Time Continuous Travel Operations Do not travel continuously at high speed for two hours or more. The lubricating oil inside the track rollers will rise to a high tem- perature, and there is danger that this will cause damage to the oil seal or leakage of oil.
Page 224 OPERATION MACHINE OPERATIONS AND CONTROLS Permissible Water Depth NOTICE When driving the machine out of water, if the angle of the machine exceeds 15°, the rear of the upper structure will go under water, and water will be thrown up by the cooling fan.
Page 225: Traveling On Slopes
OPERATION MACHINE OPERATIONS AND CONTROLS TRAVELING ON SLOPES WARNING Turning or operating the work equipment when work- ing on slopes may cause the machine to lose it bal- ance and turn over, so avoid such operations. It is particularly dangerous to swing downhill when the bucket is loaded.
Page 226 OPERATION MACHINE OPERATIONS AND CONTROLS When traveling up a steep slope, extend the work equipment to the front to improve the balance, keep the work equipment approximately 20 to 30 cm above the ground, and travel at low speed. Traveling Downhill Put the travel lever in the neutral position.
Page 227: Escape From Mud
OPERATION MACHINE OPERATIONS AND CONTROLS ESCAPE FROM MUD Always operate carefully to avoid getting stuck in mud. If the machine does get stuck in mud, do as follows to get the machine out. Place the machine push-up switch at high-pressure set posi- tion (b).
Page 228: Recommended Applications
OPERATION MACHINE OPERATIONS AND CONTROLS RECOMMENDED APPLICATIONS In addition to the following, it is possible to further increase the range of applications by using various attachments. Backhoe Work A backhoe is suitable for excavating areas that are lower than the machine. When the condition of the machine is as shown in the diagram on the right (angle between [bucket cylinder and link] and [arm cylinder and arm] is 90°), the maximum excavation force is...
Page 229: Loading Work
OPERATION MACHINE OPERATIONS AND CONTROLS Loading Work In places where the swing angle is narrow, work efficiency can be enhanced by locating the dump truck in a place easily visi- ble to the operator. Loading is easier and capacity greater if you begin from the front of the dump truck body than if loading is done from the side.
Page 230: Bucket Replacement And Inversion
OPERATION MACHINE OPERATIONS AND CONTROLS BUCKET REPLACEMENT AND INVERSION WARNING When pins are knocked in with a hammer, pieces of metal may fly and cause serious injury. When carrying out this operation, always wear goggles, hard hat, gloves, and other protective equip- ment.
Page 231: Inversion
OPERATION MACHINE OPERATIONS AND CONTROLS REMARK When installing the bucket, for arm pin portion (A), fit O-ring (3) to bucket (4) in the position shown in the diagram on the right. After inserting the pin, fit it in the standard groove. For link pin portion (B), install the bucket with O-ring (3) fitted in the standard groove.
Page 232: Parking Machine
OPERATION MACHINE OPERATIONS AND CONTROLS 3. After removing the bucket, reverse it. 4. Align arm (5) with replacement bucket hole (1), then align link (6) with hole (2), coat pins (A) and (B) with grease, and install. REMARK When reversing, do not install an O-ring. Keep the O-ring in a safe place until using it next.
Page 233 OPERATION MACHINE OPERATIONS AND CONTROLS 1. Put left and right travel levers (1) in the neutral position. The machine stops. 2. Turn fuel control dial (2) to low idling position (MIN) and lower the engine speed. 3. Lower the bucket horizontally until the bottom touches the ground.
Page 234: Machine Inspection After Daily Work
OPERATION MACHINE OPERATIONS AND CONTROLS 5. Check the engine cooling water temperature and engine oil pressure with the machine monitor. If the coolant temperature gauge is in the red range, allow it to cool until the indicator enters the green range, then stop the engine.
Page 235: Transportation
Note that the weight and dimensions given in SPECIFICATIONS may differ according to the type of shoe or arm, or other attachments. Please consult your Komatsu distributor for details of the procedure for transporting machines with a protective guard installed for the operator's cab.
Page 236: Loading And Unloading With Trailer
OPERATION TRANSPORTATION LOADING AND UNLOADING WITH TRAILER WARNING Always obey the following when loading or unloading the machine from a trailer. Select firm, level ground when loading or unloading the machine. Maintain a safe distance from the edge of the road. Always turn the auto-deceleration switch OFF (cancel).
Page 237: Loading
OPERATION TRANSPORTATION Loading 1. Load and unload on firm level ground only. Maintain a safe distance from the edge of a road. 2. Apply the trailer brakes securely, then put blocks (1) under the tires to prevent the trailer from moving. Set left and right ramps (2) parallel to each other and equally spaced to the left and right of center (3) of the trailer.
Page 238 OPERATION TRANSPORTATION 6. If the machine is equipped with work equipment, set the work equipment at the front, and travel forward to load it; if it has no work equipment, travel in reverse to load it. Follow instructions and signals of a conductor particularly when traveling in reverse.
Page 239: Securing Machine
OPERATION TRANSPORTATION 10. When the machine travels over the rear wheels of the trailer, it becomes unstable, drive slowly and carefully. (Never operate the steering.) 11. At the moment the machine passes the rear wheels, it tilts forward, be careful not to let the work equipment hit the trailer body.
Page 240 OPERATION TRANSPORTATION 5. Place blocks under both ends of the tracks to prevent the machine from moving during transportation, and secure the machine with chains or wire rope of suitable strength. Be particularly careful to secure the machine in position so it does not slip to the side.
Page 241 OPERATION TRANSPORTATION Mirror (B) 3. Loosen mounting bolt (2), then remove mirror (1) from sup- port (3). 4. Loosen bolt (4) and remove support (3) and clamp (5) from the handrail. Mirrors (C), (D) (If equipped) 5. Loosen locknut (2), then remove mirror (1) from bracket (3).
Page 242 OPERATION TRANSPORTATION Mirrors (C), (D) (If equipped) 5. Install bracket (3) to the machine with bolt (4). 6. Install mirror (1) to bracket (3),then tighten locknut (2). Unloading 1. Load and unload on firm level ground only. Maintain a safe distance from the edge of a road.
Page 243 OPERATION TRANSPORTATION 6. Turn the travel speed selector switch to low speed travel (Lo lamp lights up). Press travel speed selector switch (5) to switch the travel speed. The travel speed (Lo, Mi, Hi) is displayed on the travel speed monitor (6). 7.
Page 244 The method of lifting differs according to the attachments and options installed. For details of the procedure for machines that are not the standard specification, please consult your Komatsu distributor. For weight, see “SPECIFICATIONS (5-2)“. When lifting the machine, carry out the operation on flat ground as follows.
Page 245 OPERATION TRANSPORTATION 5. Pass wire ropes between the 1st and 2nd track rollers from the front and between the 1st and 2nd track rollers from the rear. However, for machines equipped with a full roller guard for the track roller, pass the wire rope under the track. 6.
Page 246 This machine is separated into four kits for transportation: (1) upper structure, (2) cab, (3) work equipment, (4) oth- ers. When transporting the machine, please ask your Komatsu distributor to divide the machine up into kits. Posture for Each Unit...
Page 247 OPERATION TRANSPORTATION Item Unit PC450, PC450LC 1,670 1,840 Overall width 1,000 Weight Work Equipment Boom Item Unit PC450, PC450LC 7,280 1,730 Overall width Weight 4,600 Arm, Bucket Item Unit PC450, PC450LC 4,890 1,950 Overall width 1,620 Weight 3,400 Others Counterweight Item Unit PC450, PC450LC...
Page 248 OPERATION TRANSPORTATION PROCEDURE FOR INCREASING OR REDUCING TRACK FRAME GAUGE WARNING Never use the machine for operations with the track frame retracted. Never operate the cylinders suddenly when extending or retracting the track frame gauge width. It is dangerous if they are operated suddenly. Stop the machine on firm level ground when extending or retracting the track frame gauge width.
Page 249 OPERATION TRANSPORTATION Increasing Track Gauge 1. Remove center frame mounting bolts (1) (front + rear: each 4 bolts) from the front and rear of the track frame on the side to be extended. 2. Swing the upper structure to the opposite side to where the track frame gauge is to be increased, set it at 90°...
Page 250 Do not use any water leakage prevention agent, either alone, or in combination with antifreeze. Do not mix one brand of antifreeze with a different brand. When using Komatsu Supercoolant (AF-NAC), there is no need to use a corrosion resistor. For details, see “CLEAN INSIDE OF COOLING SYSTEM (4-27)“.
Page 251 OPERATION COLD WEATHER OPERATION Battery WARNING The battery generates flammable gas. Do not bring fire or sparks near the battery. Battery electrolyte is dangerous. If it gets in your eyes or on your skin, wash it off with a large amount of water and consult a doctor.
Page 252 OPERATION COLD WEATHER OPERATION AFTER DAILY WORK COMPLETION WARNING Performing idle-running of the tracks is dangerous, stay well away from the tracks. To prevent mud, water, or the undercarriage from freezing and making it impossible for the machine to move on the following morning, observe the following precautions.
Page 253 OPERATION LONG TERM STORAGE LONG TERM STORAGE BEFORE STORAGE NOTICE To protect the hydraulic cylinder piston rod while in stor- age, keep the work equipment in the posture shown at right. (This prevents rust from developing on the piston rod) When putting the machine in storage for a long time (more than one month), do as follows.
Page 254 NOTICE If the machine has been stored without carrying out the monthly rust-prevention operation, consult your Komatsu distributor before using it. When using the machine after long-term storage, do as follows before using it. Wipe off the grease from the hydraulic cylinder rods.
Page 255 OPERATION TROUBLES AND ACTIONS TROUBLES AND ACTIONS RUNNING OUT OF FUEL When starting the engine again after running out of fuel, fill with fuel, then bleed the air from the fuel system before starting the engine. Always watch the fuel level and be careful not to run out of fuel. If the engine has stopped because of lack of fuel, it is necessary to use the priming pump to bleed the air com- pletely from the fuel circuit.
Page 256 OPERATION TROUBLES AND ACTIONS PHENOMENA THAT ARE NOT FAILURES Note that the following phenomena are not failures: When the arm control lever is operated to the IN position and the work equipment is lowered under no load from a high position, the arm speed will drop momentarily when the arm is more or less at the vertical position.
Page 257 OPERATION TROUBLES AND ACTIONS If the machine sinks in mud and cannot get out under its own power, or if the drawbar pull of the excavator is being used to tow a heavy object, use a wire rope as shown in the diagram on the right.
Page 258 OPERATION TROUBLES AND ACTIONS DISCHARGED BATTERY WARNING It is dangerous to charge a battery when mounted on a machine. Make sure that it is dismounted before charging. When checking or handling the battery, stop the engine and turn the starting switch key to the OFF position.
Page 259 OPERATION TROUBLES AND ACTIONS Battery Charges When charging the battery, if the battery is not handled cor- rectly, there is a hazard that the battery may explode. Always follow the instructions of “DISCHARGED BATTERY (3-192)“ and the instruction manual accompanying the charger, and do as follows.
Page 260 OPERATION TROUBLES AND ACTIONS Starting Engine with Booster Cables When starting the engine with a booster cable, do as follows. Connecting and Disconnecting Booster Cables WARNING When connecting the cables, never contact the posi- tive (+) and negative (-) terminals. When starting the engine with a booster cable, always wear safety glasses.
Page 261 OPERATION TROUBLES AND ACTIONS Booster Cable Connection Keep the starting switch of the normal machine and problem machine in the OFF position. Connect the booster cable as follows, in the order of the numbers marked in the diagram. 1. Connect the clip of booster cable (A) to the positive (+) ter- minal of battery (C) on the problem machine.
Page 262 TROUBLES AND ACTIONS OTHER TROUBLE Electrical System ( ): Always contact your Komatsu distributor when dealing with these items. In cases of problems or causes which are not listed below, contact your Komatsu distributor for repairs. Problem Main causes Remedy Lamp does not glow brightly even •Defective wiring, deterioration of...
Page 263 OPERATION TROUBLES AND ACTIONS Chassis ( ): Always contact your Komatsu distributor when dealing with these items. In cases of problems or causes which are not listed below, contact your Komatsu distributor for repairs. Problem Main causes Remedy Speed of travel, swing, boom, arm, •Lack of hydraulic oil...
Page 264 OPERATION TROUBLES AND ACTIONS Engine ( ): Always contact your Komatsu distributor when dealing with these items. In cases of problems or causes which are not listed below, contact your Komatsu distributor for repairs. Problem Main causes Remedy •Engine oil pan oil level is low (suck- •Add oil to specified level, see...
Page 265 OPERATION TROUBLES AND ACTIONS Problem Main causes Remedy •Low-grade fuel being used •Change to specified fuel •Overheating •Refer to “Radiator coolant level Abnormal noise generated (combus- monitor lights up“ as above tion or mechanical) •Damage inside muffler (•Replace muffler) •Excessive valve clearance (•Adjust valve clearance) Electronic Control System When the user code is shown on the display portion of the...
Page 266 REMARK If no point of contact telephone number has been registered, no telephone number is displayed. It is necessary to register the telephone number, please ask your Komatsu distributor to carry out the registration. 3-200...
Page 267 MAINTENANCE WARNING Please read and make sure that you understand the SAFETY section before reading this section.
Page 268 Use Komatsu genuine parts specified in the Parts Book as replacement parts. Komatsu Genuine Lubricants For lubrication of the machine, use the Komatsu genuine lubricants. Moreover use oil of the specified viscosity according to the ambient temperature. Windshield Washer Fluid Use automobile window washer fluid, and be careful not to let any dirt get into it.
Page 269 MAINTENANCE MAINTENANCE INFORMATION Dusty Job Site When working at dusty work sites, do as follows: Clean the radiator fins and other parts of the heat exchange equipment more frequently, and take care not to let the fins become clogged. Replace the fuel filter more frequently. Clean electrical components, especially the starting motor and alternator, to avoid accumulation of dust.
Page 270 Komatsu distributor. When using commercially available oil, it may be necessary to reduce the oil change interval. We recommend that you use the Komatsu oil clinic to carry out a detailed checks of the characteristics of the oil.
Page 271 Komatsu Supercoolant (AF-NAC) is strongly recommended wherever available. When using Komatsu Supercoolant (AF-NAC), there is no need to use a corrosion resistor. For details, see “CLEAN INSIDE OF COOLING SYSTEM (4-27)“. When diluting the antifreeze coolant, use distilled water or tap water (soft water).
Page 272 Be particularly careful to wipe off the old grease in places where sand or dirt sticking in the grease would cause wear of the rotating parts. CARRYING OUT KOWA (Komatsu Oil Wear Analysis) KOWA is a maintenance service that makes it possible to prevent machine failures and downtime. With KOWA, the oil is periodically sampled and analyzed.
Page 273 Perform sampling at regular fixed intervals. Do not perform sampling on rainy or windy days when water or dust can get into the oil. For further details of KOWA, please contact your Komatsu distributor. STORING OIL AND FUEL Keep indoors to prevent any water, dirt, or other impurities from getting in.
Page 274 MAINTENANCE OUTLINE OF SERVICE EXPLANATION OF LUBRICATION CHART DECAL Interval of service Change filter Lubrication by greasing (G) Amount of oil required at change (liters) Check oil level/change (EO)
Page 275 MAINTENANCE OUTLINE OF SERVICE Key to lubrication points (to be checked) Item Part Action refer to page Engine oil Check level 3-114 Check level 3-113 Hydraulic oil Change oil 4-82 Bucket cylinder rod pin Grease 4-48 Bucket-link coupling pin Grease 4-48 Arm-bucket coupling pin Grease...
Page 276 Never install any electric components other than those specified by Komatsu. External electro-magnetic interference may cause malfunction of the control system controller, before install- ing a radio receiver or other wireless equipment, contact your Komatsu distributor. When working at the seashore, carefully clean the electric system to prevent corrosion.
Page 277 When replacing parts, always use Komatsu genuine parts. As a result of our continuous efforts to improve product quality, the part number may change, so inform your Komatsu distributor of the machine serial number and check for the latest part number when ordering parts. WEAR PARTS LIST The parts in parentheses are to be replaced at the same time.
Page 278 RECOMMENDED FUEL, COOLANT, AND LUBRICANT RECOMMENDED FUEL, COOLANT, AND LUBRICANT Komatsu genuine oils are adjusted to maintain the reliability and durability of Komatsu construction equipment and components. In order to keep your machine in the best conditioner for long periods of time, it is essential to follow the instructions in this Operation and Maintenance Manual.
Page 279 Note 1: HTHS ( High-Temperature High-Shear Viscosity 150°C), specified by ASTM D4741 must be equal to or higher than 3.5 mPa-S. Komatsu EOS0W30 and EOS5W40 are the most suitable oils. Note 2: Powertrain oil has different properties from engine oil. Be sure to use the recommended oils.
Page 280 3) To maintain the anticorrosion properties of Supercoolant AF-NAC, always keep the density of Supercoolant between 30% and 68%. RECOMMENDED BRANDS, RECOMMENDED QUALITY FOR PRODUCTS OTHER THAN KOMATSU GENUINE OIL When using commercially available oils other than Komatsu genuine oil, consult your Komatsu distributor. 4-14...
Page 281 Unless otherwise specified, tighten the metric nuts and bolts to the torque shown in the table below. If it is necessary to replace any nut or bolt, always use a Komatsu genuine part of the same size as the part that was replaced.
Page 282 When replacing hoses, always replace O-rings, gaskets, and other such parts at the same time. Have your Komatsu distributor replace the critical parts. SAFETY CRITICAL PARTS LIST Safety critical parts for periodic replacement...
Page 283 MAINTENANCE MAINTENANCE SCHEDULE MAINTENANCE SCHEDULE If the machine is equipped with a hydraulic breaker, the maintenance schedule for some parts will be different. For details, see “MAINTENANCE INTERVAL FOR HYDRAULIC BREAKER (4-19)“ to confirm the correct main- tenance schedule when carrying out maintenance. MAINTENANCE SCHEDULE CHART INITIAL 1000 HOURS MAINTENANCE (ONLY AFTER THE FIRST 1000 HOURS) CHECK ENGINE VALVE CLEARANCE, ADJUST ...................
Page 284 MAINTENANCE MAINTENANCE SCHEDULE EVERY 1000 HOURS MAINTENANCE REPLACE FUEL MAIN FILTER CARTRIDGE....................4-674 REPLACE HYDRAULIC OIL FILTER ELEMENT ..................... 4-704 CHANGE OIL IN SWING MACHINERY CASE ....................4-714 CHECK OIL LEVEL IN DAMPER CASE, ADD OIL ..................4-724 CHECK ALL TIGHTENING POINTS OF ENGINE EXHAUST PIPE CLAMPS ..........4-724 REPLACE HYDRAULIC TANK ADDITIONAL BREATHER ELEMENT ............
Page 285 MAINTENANCE MAINTENANCE SCHEDULE MAINTENANCE INTERVAL FOR HYDRAULIC BREAKER For machine equipped with a hydraulic breaker, the hydraulic oil deteriorates faster than for normal bucket dig- ging operations, so set the maintenance intervals as follows. Replace hydraulic filter element On a new machine, replace the element after the first 100 to 150 hours, then carry out further replacement of the ele- ment according to the table on the right.
Page 286: Initial 1000 Hours Maintenance (Only After The First 1000 Hours)
Carry out the following maintenance only after the first 1000 hours of operation on new machines. Check engine valve clearance, adjust Special tools are needed for inspection and maintenance, so contact your Komatsu distributor. For details of the method of replacing or maintaining, see the section on EVERY 2000 HOURS SERVICE.
Page 287: When Required
MAINTENANCE MAINTENANCE PROCEDURE WHEN REQUIRED CHECK, CLEAN AND REPLACE AIR CLEANER ELEMENT WARNING When using compressed air, there is danger of dirt flying and causing personal injury. Always wear protective glasses, dust mask, or other protective equipment. When removing the outer element from the air cleaner body, it is dangerous to pull it out by force. When working in high places or where the foothold is poor, be careful not to fall because of the reac- tion when pulling out the outer element.
Page 288 MAINTENANCE MAINTENANCE PROCEDURE Cleaning Outer Element NOTICE Before and after cleaning the element, do not leave or keep it in direct sunlight. 1. Open the right door of the machine, remove 6 hooks (2), then remove cover (3). NOTICE Never remove the inner element (6). It will allow dirt to enter and cause failure of the engine.
Page 289 MAINTENANCE MAINTENANCE PROCEDURE 8. If small holes or thinner parts are found on the element when it is checked by shining a light through it after clean- ing, replace the element. 9. Remove the cloth or tape covering inner element (6). NOTICE Do not use an element whose folds or gasket or seal are damaged.
Page 290 MAINTENANCE MAINTENANCE PROCEDURE NOTICE When inserting the element, if the rubber at the tip is swol- len or the outer element is not pushed in straight, and cover (3) is assembled by force to hook (2), there is danger that the hook and air cleaner body may be damaged, so be careful when assembling.
Page 291 MAINTENANCE MAINTENANCE PROCEDURE Replacing Element 1. Open the right door of the machine, remove 6 hooks (2), then remove cover (3). 2. Hold the outer element (5), rock it lightly up and down and to the left and right, and rotate the element to the left and right to pull it out.
Page 292 MAINTENANCE MAINTENANCE PROCEDURE NOTICE Be sure to install the air cleaner element facing in the cor- rect direction. Install so that the bottom of the air cleaner element cylin- der (face where no hole is drilled) (B), (C) is at cover (3) end.
Page 293: Clean Inside Of Cooling System
Komatsu Supercoolant (AF-NAC) is strongly recommended wherever available. When using Komatsu Supercoolant (AF-NAC), there is no need to use a corrosion resistor. When no corrosion resistor is used, use the special cover (600-411-9000). Please consult your Komatsu distrib- utor about the method of installing.
Page 294 When changing the coolant or draining the coolant from the radiator before carrying out repairs, ask a specialist company to handle any coolant containing antifreeze, or contact your Komatsu distributor. Antifreeze is toxic, so never pour it into drainage water ditches or drain it onto the ground surface.
Page 295 MAINTENANCE MAINTENANCE PROCEDURE 4. Check that the cooling water temperature has gone down enough to make it possible to touch the radiator cap sur- face by hand, then turn radiator cap (3) slowly until it con- tacts the stopper to release the pressure. 5.
Page 296: Check And Tighten Track Shoe Bolts
MAINTENANCE MAINTENANCE PROCEDURE 16. Open the rear engine hood, drain the water from sub-tank (8), wash the inside of the sub-tank, then add water to a point between the FULL and LOW marks. If the sub-tank is extremely dirty and it is difficult to clean, replace it with a new part.
Page 297: Check And Adjust Track Tension
Never loosen any part other than plug (1). Never put your face in the mounting direction of plug (1). If the track tension cannot be loosened with the procedure given here, please contact your Komatsu distributor. Increasing Track Tension Prepare a grease pump.
Page 298 It is extremely dangerous to release the grease by any method except the procedure given below. If track tension is not relieved by this procedure, contact your Komatsu distributor for repairs. 1. Loosen plug (1) gradually to release the grease.
Page 299: Replace Bucket Teeth (Vertical Pin Type)
MAINTENANCE MAINTENANCE PROCEDURE REPLACE BUCKET TEETH (VERTICAL PIN TYPE) Replace the bucket teeth before the adapter starts to wear. WARNING It is dangerous if the work equipment moves by mistake when the teeth are being replaced. Set the work equipment in a stable condition, then stop the engine and set the lock lever securely to the LOCK position.
Page 300 MAINTENANCE MAINTENANCE PROCEDURE The lock pin (2) is too short. Dimension (B) is 1/3 or more of dimension (A) when lock- ing pin (2) is aligned with bottom face (C). Rubber (6) of the rubber pin lock is cut and the steel ball is about to come out.
Page 301 MAINTENANCE MAINTENANCE PROCEDURE 8. Fit tooth (1) to adapter (4), and confirm that when the pointer is pressed strongly, the rear face of the hole for the pin of the teeth (1) is at the same level as the rear face of the hole for the pin of the adapter (4).
Page 302: Replace Bucket Teeth (Horizontal Pin Type)
3. Place a bar on the head of pin (1), hit the bar with a ham- mer to knock out the pin, then remove tooth (2). REMARK If the bucket teeth cannot be safely removed by this method, have your Komatsu distributor replace the bucket teeth. 4-36...
Page 303 MAINTENANCE MAINTENANCE PROCEDURE 4. Clean the mounting face. Fit a new tooth (2) in the adapter, push in pin (1) partially by hand, then lock it with a hammer to install the tooth to the bucket. 4-37...
Page 304: Replace Bucked Side Cutter Shroud
(2). REMARK If it cannot be removed by this method, for safety reasons, always contact your Komatsu distributor to have the replace- ment carried out. 2. Clean the mounting face. Fit a new shroud (2) in the adapter, push in pin (1) partially by hand, then lock it with a hammer to install the tooth to the bucket.
Page 305: Adjust Bucket Crearance
MAINTENANCE MAINTENANCE PROCEDURE ADJUST BUCKET CLEARANCE WARNING It is dangerous if the work equipment is mistakenly moved when adjusting the bucket clearance. Set the work equipment in a stable condition, stop the engine, then set safety lock lever securely to the LOCK position (L).
Page 306: Check Window Washer Fluid Level, Add Fluid
MAINTENANCE MAINTENANCE PROCEDURE CHECK WINDOW WASHER FLUID LEVEL, ADD FLUID If there is air in the window washer fluid, check the level of the fluid in window washer tank (1), and if it is low, add auto- mobile window washer fluid. The window washer tank (1) is at the rear left of the machine inside the door.
Page 307: Check And Maintenance Air Conditioner
(C) Colorless, transparent: No refrigerant REMARK When there are bubbles, the refrigerant gas level is low, so contact your Komatsu distributors to have refrigerant added. If the air conditioner is run with the refrigerant gas level low, it will cause damage to the compressor.
Page 308: Washing Washable Floor
MAINTENANCE MAINTENANCE PROCEDURE WASH WASHABLE FLOOR WARNING When setting the machine at an angle, use strong blocks to stabilize the machine and be extremely careful when carrying out the operation. If the control levers are touched by mistake, the machine may suddenly move, and this may lead to a serious accident.
Page 309 MAINTENANCE MAINTENANCE PROCEDURE 3. Lower the work equipment to the ground and set the machine in a stable condition. 4. Set lock lever (1) to LOCK position (L) and stop the engine. 5. Remove the floor mat holder plate (4). 6.
Page 310 MAINTENANCE MAINTENANCE PROCEDURE Method of Setting Machine at Angle Method Using Slope WARNING Select a solid and smooth slope. Always put blocks under the track to prevent the machine from moving, and dig the work equipment into the ground. 1. Stop the machine so that the work equipment is on the downhill side.
Page 311: Bleeding Air From Hydraulic System
MAINTENANCE MAINTENANCE PROCEDURE BLEEDING AIR FROM HYDRAULIC SYSTEM For details, see “STARTING ENGINE (3-128)“. If it is necessary to refer to the items for starting the engine, moving the machine off, steering, or stopping, see the OPERATION section. 1. Bleeding air from pump 1) Loosen air bleeder (1) and check that oil oozes out from the air bleeder.
Page 312 NOTICE If the air is not bled from the swing motor, the motor bearings may be damaged. When replacing the travel motor safety valve, please contact your Komatsu distributor to have it replaced and to have the air bled. 5. Bleeding air from travel motor (Bleed the air only when the oil inside the travel motor case has been drained.)
Page 313: Checks Before Starting
MAINTENANCE MAINTENANCE PROCEDURE CHECK BEFORE STARTING For details of the following items, see “Checks Before Starting (3-112)“ in the OPERATION section. Drain water and sediment from fuel tank Check oil level in hydraulic tank, add oil Check oil level in engine oil pan, add oil Check for water and sediment in water separator, drain water Check coolant level, add coolant Check electric wiring...
Page 314: Every 50 Hours Maintenance
MAINTENANCE MAINTENANCE PROCEDURE EVERY 50 HOURS MAINTENANCE LUBRICATING NOTICE If any abnormal noise is generated from any greasing point, carry out greasing regardless of the greasing interval. Carry out greasing every 10 hours for the first 50 hours on a new machine. After the machine was subjected to jobs in the water, be sure to grease the wet pins.
Page 315: Every 250 Hours Maintenance
MAINTENANCE MAINTENANCE PROCEDURE EVERY 250 HOURS MAINTENANCE Maintenance for every 50 hours service should be carried out at the same time. LUBRICATE SWING CIRCLE 1. Lower the work equipment to the ground. 2. Using a grease pump, pump in grease through the grease fittings shown by arrows.
Page 316 MAINTENANCE MAINTENANCE PROCEDURE CHECK LEVEL OF BATTERY ELECTROLYTE Carry out this procedure before operating the machine. WARNING Do not use the battery if the battery electrolyte level is below the LOWER LEVEL line. This will acceler- ate deterioration of the inside of the battery and reduce the service life of the battery. In addition, it may cause an explosion.
Page 317 (U.L.) line. Neutralize the removed fluid with baking soda (sodium bicarbonate), then flush it away with a large amount of water or consult your Komatsu distributor or battery maker. When it is Impossible to Check Electrolyte Level from Side of Battery If it is impossible to check the electrolyte level from the side of the battery, or there is no display of the UPPER LEVEL line on the side of the battery, check as follows.
Page 318 Check each pulley for damage, wear of the V-groove, and wear of the V-belt. In particular, be sure to check that the V-belt is not touching the bottom of the V-groove. In case any of the following occurs, ask the Komatsu distributor in your territory to replace the belts with new ones.
Page 319 V-belt. In particular, be sure to check that the V-belt is not touching the bottom of the V- groove. In case any of the following occurs, ask the Komatsu distributor in your territory to replace the belts with new ones.
Page 320 MAINTENANCE MAINTENANCE PROCEDURE EVERY 500 HOURS MAINTENANCE Maintenance for every 50 and 250 hours service should be carried out at the same time. LUBRICATING NOTICE If any abnormal noise is generated from any greasing point, carry out greasing regardless of the greasing interval.
Page 321 The common rail fuel injection system used on this machine consists of more precise parts than the conventional injection pump and nozzle. If any part other than a genuine Komatsu filter cartridge is used, dust or dirt may get in and cause problems with the injection system. Always avoid using substitute parts.
Page 322 MAINTENANCE MAINTENANCE PROCEDURE 1. Turn the valve (1) at the bottom of the fuel tank to the CLOSE position (S). 2. Open the front engine hood. 3. Set the container to catch the fuel under the filter cartridge (2). 4. Loosen drain valve (3), then drain all the water and sedi- ment in the transparent cap (4) and also the fuel accumu- lated in filter cartridge (2).
Page 323 MAINTENANCE MAINTENANCE PROCEDURE NOTICE When adding fuel, do not remove cap (B). Always add fuel from the 8 small holes (A) on the dirty side. After adding fuel, remove cap (B) and install the fuel fil- ter. Always fill with clean fuel. Be careful not to let any dirt or dust get into the fuel.
Page 324 4. Check if the grease is milky white. If it is milky white, it is necessary to change the grease. Please contact your Komatsu distributor. The total amount of grease is 33 liters (29.7 kg). 5. Install cover (2) with bolts (1).
Page 325 MAINTENANCE MAINTENANCE PROCEDURE CHANGE OIL IN ENGINE OIL PAN, REPLACE ENGINE OIL FILTER CARTRIDGE WARNING Parts and oil are at high temperature immediately after the engine is stopped and may cause serious burns. Wait for the oil temperature to go down before performing this operation. Refill capacity: 37 liters Prepare a filter wrench 1.
Page 326 MAINTENANCE MAINTENANCE PROCEDURE 7. After replacing the filter cartridge, add oil through oil filler port (F) so that the oil level is between the H and L marks on dipstick (G). 8. Run the engine at idle for a short time, then stop the engine, and check that the oil level is between the H and L marks on the dipstick.
Page 327 MAINTENANCE MAINTENANCE PROCEDURE CLEAN AND INSPECT RADIATOR FINS, OIL COOLER FINS, AFTERCOOLER FINS AND CONDENSER FINS WARNING If compressed air, high-pressure water, or steam hits your body directly or dirt is sent flying by the com- pressed air, high-pressure water, or steam, there is danger of personal injury. Always wear protective glasses, dust mask, and other protective equipment.
Page 328 MAINTENANCE MAINTENANCE PROCEDURE CLEAN AIR CONDITIONER FRESH/RECIRC FILTERS WARNING If compressed air scattered around dust and debris, there is danger of injury. Always wear protective equipment such as protective glasses and mask. NOTICE As a guideline, the filters should be cleaned every 500 hours, but on dusty job sites, clean the filters more frequently.
Page 329 MAINTENANCE MAINTENANCE PROCEDURE Cleaning Fresh Air Filter 1. Use the starting switch key to open cover (2) at the rear left of the operator's cab, then open cover (2) by hand and remove filter (3) inside the cover. 2. Clean the filter with compressed air. If there is oil on the fil- ter, or if the filter is extremely dirty, wash it in a neutral agent.
Page 330 MAINTENANCE MAINTENANCE PROCEDURE REPLACE BREATHER ELEMENT IN HYDRAULIC TANK WARNING The parts and oil are at high temperature immediately after the engine is stopped, and may cause burns. Wait for the temperature to go down before starting the work. When removing the oil filler cap, turn it slowly to release the internal pressure, then remove it. 1.
Page 331: Check Oil Level In Swing Machinery Case, Add Oil
MAINTENANCE MAINTENANCE PROCEDURE CHECK OIL LEVEL IN SWING MACHINERY CASE, ADD OIL WARNING Parts and oil are at high temperature immediately after the engine is stopped and may cause serious burns. Wait for the oil temperature to go down before performing this operation. 1.
Page 332: Check Oil Level In Final Drive Case, Add Oil
MAINTENANCE MAINTENANCE PROCEDURE CHECK OIL LEVEL IN FINAL DRIVE CASE, ADD OIL WARNING The parts and oil are at high temperature immediately after the engine is stopped, and may cause seri- ous burns. Wait for the temperature to go down before starting the operation. If there is still pressure remaining inside the case, the oil or plug may fly out.
Page 333: Every 1000 Hours Maintenance
The common rail fuel injection system used on this machine consists of more precise parts than the conventional injection pump and nozzle. If any part other than a genuine Komatsu filter cartridge is used, dust or dirt may get in and cause problems with the injection system. Always avoid using substitute parts.
Page 334 MAINTENANCE MAINTENANCE PROCEDURE 2. Open the front engine hood. 3. Set the container to catch the fuel under the filter cartridge (2). 4. Using a filter wrench, turn filter cartridge (2) counterclock- wise to remove it. 5. Clean the filter holder, coat the packing surface of the new filter cartridge thinly with oil, then install the filter cartridge to the filter holder.
Page 335 MAINTENANCE MAINTENANCE PROCEDURE 10. Loosen air bleed plug (C) at the fuel main filter head (3). 11. Loosen wing nut (6) holding lever (5) of priming pump (4). 12. Push in lever (5) repeatedly. Check that bubbles come out with the fuel from air bleed plug (C).
Page 336: Replace Hydraulic Oil Filter Element
MAINTENANCE MAINTENANCE PROCEDURE REPLACE HYDRAULIC OIL FILTER ELEMENT WARNING The parts and oil are at high temperature immediately after the engine is stopped, and may cause burns. Wait for the temperature to go down before starting the work. When removing the oil filler cap, turn it slowly to release the internal pressure, then remove it. NOTICE If the machine is equipped with a hydraulic breaker, the hydraulic oil will deteriorate much faster than dur- ing normal bucket operations.
Page 337: Change Oil In Swing Machinery Case
MAINTENANCE MAINTENANCE PROCEDURE REMARK Operate the machine after halting for more than 5 minutes to eliminate bubbles in the oil inside the tank. 12. Check for oil leakage and wipe off any spilled oil. CHANGE OIL IN SWING MACHINERY CASE WARNING Parts and oil are at high temperature immediately after the engine is stopped and may cause serious burns.
Page 338: Check Oil Level In Damper Case, Add Oil
3. Install plug (P) and cap (F). 4. Close the door. CHECK ALL TIGHTENING POINTS OF ENGINE EXHAUST PIPE CLAMPS Please ask your Komatsu distributor to check the tightening of the clamps between the air cleaner - turbo- charger - after cooler - engine. 4-72...
Page 339: Replace Hydraulic Tank Additional Breather Element
3. Install cover (3) and nut (2). CHECK NITROGEN GAS CHARGE PRESSURE IN ACCUMULATOR (for breaker) (If equipped) A special tool is needed for inspecting and charging with nitrogen gas. Have your Komatsu distributor inspect and charge the accumulator. 4-73...
Page 340: Replace Corrosion Resistor Cartridge
In the installation, turn the cartridge by two-thirds of one turn after the packing surface comes to contact with the sealing face of the cartridge stand. A genuine Komatsu filter cartridge is recommended for use. 5. Open valves (1) (2 places).
Page 341: Every 2000 Hours Maintenance
MAINTENANCE MAINTENANCE PROCEDURE EVERY 2000 HOURS MAINTENANCE Maintenance for every 50, 250, 500 and 1000 hours service should be carried out at the same time. CHANGE OIL IN FINAL DRIVE CASE WARNING The parts and oil are at high temperature immediately after the engine is stopped, and may cause seri- ous burns.
Page 342: Clean Hydraulic Tank Strainer
Do not make holes in it or weld it. Do not hit it, roll it, or subject it to any impact. When disposing of the accumulator, the gas must be released. Please contact your Komatsu distributor to have this work carried out.
Page 343 MAINTENANCE MAINTENANCE PROCEDURE FUNCTION OF ACCUMULATOR The accumulator stores the pressure in the control circuit. Even after the engine is stopped, the control circuit can be operated, so the following actions are possible. If the control lever is operated in the direction to lower the work equipment, it is possible for the work equipment to go down under its own weight.
Page 344 Please contact your Komatsu distributor for inspection. 7. This completes the inspection. After completion of the inspection, set the lock lever to the LOCK position and turn the starting switch to the OFF position.
Page 345: Check Alternator
Special tools are needed for inspection and maintenance, so contact your Komatsu distributor. CHECK VIBRATION DAMPER Check that there are no cracks or peeling in the outside surface of the rubber. If any cracks or peeling are found, contact your Komatsu distributor to have the parts replaced. 4-79...
Page 346: Every 4000 Hours Maintenance
Maintenance for every 50, 250, 500, 1000 and 2000 hours service should be carried out at the same time. CHECK WATER PUMP Since the pulley may have play, oil may leak, water may leak, contact your Komatsu distributor for inspection, overhaul or replacement.
Page 347: Check For Looseness Of High-Pressure Piping Clamp, Hardening Of Rubber
Check visually and touch with your fingers to check that there are no loose bolts or hardening of rubber parts at clamps (1) to (15). If there is any looseness or hardened rubber, contact your Komatsu distributor for replace- ment.
Page 348: Every 5000 Hours Maintenance
MAINTENANCE MAINTENANCE PROCEDURE EVERY 5000 HOURS MAINTENANCE Maintenance for every 50, 250, 500 and 1000 hours service should be carried out at the same time. CHANGE OIL IN HYDRAULIC TANK WARNING The parts and oil are at high temperature immediately after the engine is stopped, and may cause burns.
Page 349 MAINTENANCE MAINTENANCE PROCEDURE First, remove drain plug (P) at the bottom of the tank, then remove drain plug (A) at the suction tube. If they are removed in this order, almost the same amount of oil can be drained. 7. Add the replacement amount of oil through oil filler (F). Check that the oil level is between the H and L lines on the sight gauge (G).
Page 350: Every 8000 Hours Maintenance
Maintenance for every 50, 250, 500, 1000, 2000 and 4000 hours service should be carried out at the same time. REPLACE HIGH-PRESSURE PIPING CLAMP Contact your Komatsu distributor to have the engine high-pressure clamps replaced. REPLACE FUEL SPRAY PREVENTION CAP Contact your Komatsu distributor to have the fuel spray prevention cap replaced. 4-84...
Page 351 SPECIFICATIONS...
Page 352 3.0/4.4/5.5 Swing speed Note: The machine operating weights shown in the table above are for the following specification: PC450-8 - 600mm shoe with 3400mm arm. PC450LC-8 - 700mm shoe with 3400mm arm. PC450LCHD-8 - 600mm shoe with 2400mm arm.
Page 353 SPECIFICATIONS SPECIFICATIONS Working ranges Unit PC450-8 PC450LC-8 PC450LCHD-8 Arm Length 3400 3400 2400 A Max. digging reach 12,025 12,025 10,713 B Max. digging depth 7,820 7,820 6,401 C Max. digging height 10,915 10,915 10,360 D Max. vertical wall digging depth...
Page 354 SPECIFICATIONS SPECIFICATIONS 6.7m Boom - PC450-8, PC450LC-8, PC450LCHD-8 LEGEND A : Reach from swing centre B : Bucket hook height OF : Lifting capacity (rating overfront) OS : Lifting capacity (rating overside) LEGEND (1) Position of lifting point (2) Arm length: (3) Boom length (4) Hydraulic pressure: 37.3 MPa...
Page 355 SPECIFICATIONS SPECIFICATIONS 6.7m Boom - PC450-8...
Page 356 SPECIFICATIONS SPECIFICATIONS 6.7m Boom - PC450LC-8...
Page 357 SPECIFICATIONS SPECIFICATIONS 6.7m Boom - PC450LCHD-8...
Page 358 SPECIFICATIONS SPECIFICATIONS 7.0m Boom - PC450-8, PC450LC-8 LEGEND A : Reach from swing centre B : Bucket hook height OF : Lifting capacity (rating overfront) OS : Lifting capacity (rating overside) LEGEND (1) Position of lifting point (2) Arm length: (3) Boom length (4) Hydraulic pressure: 37.3 MPa...
Page 359 SPECIFICATIONS SPECIFICATIONS 7.0m Boom - PC450-8...
Page 360 SPECIFICATIONS SPECIFICATIONS 7.0m Boom - PC450LC-8 5-10...
Page 361 ATTACHMENTS ANDD OPTIONS WARNING Please read and make sure that you understand the SAFETY section before reading this section.
Page 362 Install only attachments or options authorized by Komatsu. Komatsu cannot accept any responsibility for any accident, damage, or failure caused by the use of attachments or options not authorized by Komatsu. READ THE INSTRUCTION MANUAL THOROUGHLY Before installing or using any attachment or option, make sure that you thoroughly read and understand the instruction manuals for the machine and the attachment or option.
Page 363 ATTACHMENTS ANDD OPTIONS GENERAL PRECAUTIONS FOR SAFETY PRECAUTIONS WHEN USING When long or heavy work equipment is installed, remember the following precautions. Before starting operations, move the machine to a safe place and carry out a test operation to make sure that you fully understand the move- ment, center of gravity, and working range of the machine.
Page 364 4. The pressure regulation valve (2) allows the pressure at the quick coupler to be limited according to the quick coupler manufacturer's recommendation. Check the specification of the quick coupler and ensure that the valve is set appropriately. 5. Ensure that the quick coupler is installed by a suitably qualified technician. If in doubt contact your Komatsu dealer. LOCATIONS 1.
Page 365 ATTACHMENTS ANDD OPTIONS HYDRAULIC QUICK COUPLER PIPING OPERATION To release a bucket or attachment 1. If the bucket or attachment has any hydraulic connections to the machine these must be disconnected before proceeding. WARNING Pressure in the system can cause injury. Follow all instructions in ATTACHMENT REMOVAL AND INSTAL- LATION.
Page 366 This machine has a system installed to give a warning if there is a failure to maintain pressure in the quick coupler system. If the buzzer sounds in the cab make sure that the cause is clarified before continuing work. In particular check for leaks in the system. If in doubt call your Komatsu dealer.
Page 367 ATTACHMENTS ANDD OPTIONS BUCKET WITH HOOK BUCKET WITH HOOK HOOK CONDITION Check that there is no damage to the hook, stopper, or hook mount. If there is any problem, contact your Komatsu distributor. PROHIBITED OPERATIONS Operations with Care When carrying out lifting operations, reduce the engine speed and use the L mode (for fine-control operations).
Page 368 ATTACHMENTS ANDD OPTIONS MACHINE READY FOR ATTACHMENT MACHINE READY FOR ATTACHMENT LOCATIONS Stop valve Accumulator Selector valve 1st Attachment proportional control switch Attachment control pedal 2nd Attachment proportional control switch Lock pin Breaker switch Breaker circuit additional oil filter Stop Valve This valve (1) stops the flow of the hydraulic oil.
Page 369 ATTACHMENTS ANDD OPTIONS MACHINE READY FOR ATTACHMENT Selector Valve This valve (2) switches the flow of hydraulic oil. It is automatically switched according to the selected working mode. It is necessary to switch the working mode to match the attachment that is installed. For details of switching the working mode, see “HYDRAULIC CIRCUIT (6-12)“.
Page 370 ATTACHMENTS ANDD OPTIONS MACHINE READY FOR ATTACHMENT Lock Pin This pin (4) locks the control pedal. Position (a): Locked Position (b): Only front of pedal can be operated to full position (rear is locked) Position (c): Both front and rear of pedal can be operated to full position When not using the attachment, set the lock pin to position (a).
Page 371 Do not make holes in it or weld it. Do not hit it, roll it, or subject it to any impact. When disposing of the accumulator, the gas must be released. Please contact your Komatsu distributor to have this work carried out.
Page 372 When P or E mode is selected: 20.1 MPa (205 kg/cm The set pressure may have to be adjusted depending on the attachment. In such cases, please ask your Komatsu distributor to carry out the adjustment. Switching Hydraulic Circuit Depending on the type of attachment, set the working mode on the monitor as follows.
Page 373 2. Connect attachment piping (2) provided by the attachment maker to the part from which the plug was removed Step 1. For the mouthpiece size and accumulator add-on, the action to take differs according to the attachment manufac- turer, so please consult your Komatsu distributor. 6-13...
Page 374 ATTACHMENTS ANDD OPTIONS MACHINE READY FOR ATTACHMENT Oil Flow Path The direction of operation of the pedal and the path of the oil flow is as shown in the diagram below. When the front of the pedal is depressed, oil flows to the piping on the left side of the work equipment; when the rear of the pedal is depressed, oil flows to the piping on the right side of the work equipment.
Page 375 ATTACHMENTS ANDD OPTIONS MACHINE READY FOR ATTACHMENT Replace Additional Breaker Filter Element WARNING The parts and oil are at high temperature after the engine is stopped, and may cause serious burns. Wait for the temperature to go down before cleaning the engine breather.
Page 376 ATTACHMENTS ANDD OPTIONS MACHINE READY FOR ATTACHMENT 4. Set the lock lever to LOCK position (L). 5. Loosen slowly oil filler cap (F) on top of the hydraulic tank to eliminate the internal pressure in the hydraulic circuit. 6. Place a container under the filter element to catch the oil. 7.
Page 377 ATTACHMENTS ANDD OPTIONS MACHINE READY FOR ATTACHMENT ATTACHMENT REMOVAL AND INSTALLATION Attachment Removal 1. Lower the attachment to the ground and stop the engine. 2. Turn the starting switch to the ON position (B), then set the lock lever to the FREE position (F). 3.
Page 378 ATTACHMENTS ANDD OPTIONS MACHINE READY FOR ATTACHMENT 6. After checking that the oil has cooled down, turn the rotor on the stop valve installed to the piping for the inlet port and outlet port on the side face of the arm to the LOCK position (L).
Page 379 ATTACHMENTS ANDD OPTIONS MACHINE READY FOR ATTACHMENT Attachment Installation 1. Remove the bucket. For bucket dismounting procedure, see “BUCKET REPLACEMENT AND INVERSION (3-164)“. 2. Place the attachment in a horizontal position, then install to the arm with pin (A) and then pin (B). 3.
Page 380 ATTACHMENTS ANDD OPTIONS MACHINE READY FOR ATTACHMENT 7. Loosen slowly oil filler cap (F) on top of the hydraulic tank to eliminate the internal pressure in the hydraulic circuit. 8. After confirming low oil temperature, remove the plug from the outlet and inlet port respectively. Take care that no dust, mud etc.
Page 381 ATTACHMENTS ANDD OPTIONS MACHINE READY FOR ATTACHMENT ATTACHMENT OPERATIONS WARNING If the pedal is operated when the auto-deceleration is being actuated and the engine speed has dropped, the engine speed will suddenly rise, so be careful when operating. If you leave your foot resting on the pedal and depress the pedal by mistake, there is danger that the attachment may suddenly move and cause serious personal injury.
Page 382 ATTACHMENTS ANDD OPTIONS MACHINE READY FOR ATTACHMENT If the working mode pilot monitor does not display B for the breaker mode, press working mode selector switch (1) and set to the breaker mode as follows. When working mode selector switch (1) is pressed, the screen switches to the working mode selection screen.
Page 383 ATTACHMENTS ANDD OPTIONS MACHINE READY FOR ATTACHMENT Precautions when using Check that the stop valve is at the FREE position. Check that the working mode is B mode. For details of the path of the oil, see “HYDRAULIC CIRCUIT (6-12)“. When considering whether it is necessary to install an accumulator for the attachment circuit, contact the attachment manufacturer and then decide.
Page 384 ATTACHMENTS ANDD OPTIONS MACHINE READY FOR ATTACHMENT Working Mode Selection If the working mode pilot monitor does not display ATT for the attachment mode, press working mode selector switch (1) and set to the attachment mode as follows. If P, E, or L mode are selected, the attachment is not actu- ated.
Page 385 ATTACHMENTS ANDD OPTIONS MACHINE READY FOR ATTACHMENT Operation When Using Attachment 2 (e.g clamshell rotation, crusher rotation) Note - If installing 2nd attachment line as a field kit, ask distributor to change monitor setting to allow 2 attach- ments. The switch on left lever is a roller proportional control switch. Rolling the switch up produces rotation in one direction, rolling down produces rotation in the opposite direction.
Page 386 When installing any attachment or option, there may be problems with safety, so please contact your Komatsu distributor before installing. Installing attachments or options without consulting your Komatsu distributor may not only cause problems with safety, but may also have an adverse effect on the operation of the machine and the life of the equipment.
Page 387 ATTACHMENTS ANDD OPTIONS ATTACHMENT GUIDE PC400, PC400LC This table lists the combination of attachments which can be installed to the long arm (standard), short arm and extension arm. ³ : Material weight up to 1.8 t/m ³ : Material weight up to 1.5 t/m ³...
Page 388 ATTACHMENTS ANDD OPTIONS ATTACHMENT GUIDE SELECTION OF TRACK SHOES Select suitable track shoes to match the operating conditions. METHOD OF SELECTING SHOES Confirm the category from the list of uses in Table 1, then use Table 2 to select the shoe. Categories B and C are wide shoes, so there are limitations on their use.
Page 389 Select the optimum model of attachment for a hydraulic excavator on which it is to be mounted. Depending on machine models of hydraulic excavator, the kind of attachments or the model of specific attachments that can be mounted will vary. Hence, consult your Komatsu distributor for the selection of optimum attachments.
Page 390 ATTACHMENTS ANDD OPTIONS RECOMMENDED ATTACHMENT OPERATIONS When applying impact, push the chisel against the impact sur- face and operate so that the chassis rises approx. 5 cm off the ground. Do not let the machine come further off the ground than this amount.
Page 391 ATTACHMENTS ANDD OPTIONS RECOMMENDED ATTACHMENT OPERATIONS Using the mount together in pieces of rock Operations using the swing force Moving the chisel while carrying out impacting operations Holding the chisel horizontal or pointed up when carrying out impacting operations Twisting the chisel when it has penetrated the rock 6-31...
Page 392 ATTACHMENTS ANDD OPTIONS RECOMMENDED ATTACHMENT OPERATIONS Pecking operations Extending the bucket cylinder fully and thrusting to raise the machine off the ground Greasing Supply grease in the correct position. NOTICE If the breaker is greased in an improper posture, it is filled with more grease than necessary.
Page 393 Always contact your Komatsu distributor before selling or exporting any machine equipped with KOMTRAX. When selling or exporting the machine or at other times when your Komatsu distributor considers it necessary, it may be necessary for your Komatsu distributor to remove the KOMTRAX equipment or to carry out action to stop communications.
Page 394 ATTACHMENTS ANDD OPTIONS SUPER LONG FRONT BOOM AND ARM SUPER LONG FRONT BOOM AND ARM OPERATION INSTRUCTION PC450LC - 8 Ground pressure Track shoe Operating weight (mm) (kg) (kg/cm 600mm 700mm 800mm PC450LC - 8 Max Digging Reach (to bucket teeth) (mm) 20000 NOTE: Specifications are subject to change without notice.
Page 395 ATTACHMENTS ANDD OPTIONS SUPER LONG FRONT BOOM AND ARM WORKING MODES The table gives an indication of the type of work and method of use recommended. Please follow these recom- mendations. A. Type of work R - Recommended work. C - Work requiring caution. N - Work that is not permitted.
Page 396 Check daily for any oil leakage. Check all parts of the work equipment for any cracks, bending, buckling and play of the boom and arm. If any abnormality is found, contact your Komatsu distributor immediately. Locations for checking are shown below: Boom...
Page 397 ATTACHMENTS ANDD OPTIONS SUPER LONG FRONT BOOM AND ARM CAUTION Always use low travel speed and avoid travelling over rough ground. CAUTION Do not use the equipment so that the machine lifts off the ground. CAUTION Check the stability of the long front machine carefully (left, right, front and rear) before staring work oper- ations.
Page 398 ATTACHMENTS ANDD OPTIONS SUPER LONG FRONT BOOM AND ARM METHOD OF WORK Avoid operating the bucket cylinder and arm cylinder to the end of their stroke. Use for maximum specific gravity 1.8 tonnes/m Take care when using the super long front on soft ground. Ensure the ground has sufficient strength to sup- port the weight of the machine with loaded bucket before commencing operations.
Page 399 ATTACHMENTS ANDD OPTIONS SUPER LONG FRONT BOOM AND ARM CONTROL LEVERS, PEDALS 9JH02394A Safety Lock Lever Left Wrist Controller Travel Levers/Pedals Right Wrist Controller SAFETY LOCK LEVER (1) WARNING When leaving the operator’s compartment, set the safety lock lever securely to the LOCK position. If the control levers are not locked, and they are touched by mistake, this may lead to a serious accident.
Page 400 ATTACHMENTS ANDD OPTIONS SUPER LONG FRONT BOOM AND ARM TRAVEL LEVERS (WITH PEDAL, AUTO-DECEL- ERATION MECHANISM) (2) WARNING Do not put your foot on the pedal unless the machine is travelling. If you leave your foot on the pedal and press it by mistake, the machine will move suddenly, and this may lead to a serious accident.
Page 401 ATTACHMENTS ANDD OPTIONS SUPER LONG FRONT BOOM AND ARM LEFT WORK EQUIPMENT CONTROL LEVER (3) (with auto-deceleration device) WARNING If any lever is operated when in the deceleration range, the engine speed will suddenly increase, so be careful when operating the levers. This lever is used to operate the arm and upper structure.
Page 402 ATTACHMENTS ANDD OPTIONS SUPER LONG FRONT BOOM AND ARM TRANSPORT & STORAGE OF SUPER LONG FRONT MACHINE INSTALLATION OF SUPPORTING LINK For transportation or storage, always use the supporting Supporting link - weight 30 kg link to secure the arm and boom as shown. This will help to prevent excessive force bearing on the boom and arm.
Page 403 ATTACHMENTS ANDD OPTIONS SUPER LONG FRONT BOOM AND ARM TRANSPORTATION OF SUPER LONG FRONT MACHINE PC450LC - 8 (20m super long front) Undercarriage type Overall shipping height (mm) Overall shipping length (mm) Transport length (mm) Track length (mm) Track length on ground (mm) Tail swing radius (mm) Machine tail height (mm)* Overall height of cab (mm)
Page 404 ATTACHMENTS ANDD OPTIONS SUPER LONG FRONT BOOM AND ARM WORKING RANGE OF SUPER LONG FRONT PC450LC - 8 (20m super long front) Maximum digging height (mm) Maximum dumping height (mm) Maximum digging depth (mm) Maximum vertical wall digging depth (mm) Maximum digging depth for 2400mm level (mm) Minimum digging reach (mm) Maximum reach at ground level (mm)
Page 405 ATTACHMENTS ANDD OPTIONS SUPER LONG FRONT BOOM AND ARM LIFTING CAPACITY PC450 LC 20m SUPER LONG FRONT WARNING This table is provided for guidance only. The Super Long Front attachment is not intended for lifting oper- ations. Do not exceed the maximum loading conditions described in the "METHOD OF WORK" section of this manual.
Page 406 ATTACHMENTS ANDD OPTIONS SUPER LONG FRONT BOOM AND ARM MAINTENANCE SPECIAL SERVICE REQUIREMENTS FOR SUPER LONG FRONT WORK EQUIPMENT CAUTION When working in water or in wet sand, use molybdenum lubricant (LM-P) for the grease. WARNING NEVER slew the upper structure of a Super Long Front machine if the boom and arm have ben removed. In addition to the standard service schedule, described in the main machine manual, the following servicing should be carried out: SERVICE ITEM...
Page 407 ATTACHMENTS ANDD OPTIONS SUPER LONG FRONT BOOM AND ARM EVERY 50 HOURS SERVICE LUBRICATING NOTICE For the first 100 hours on new machines where the parts are setting in, carry out greasing every 10 hours. 1. Set the work equipment in the greasing posture on next page, then lower the work equipment to the ground and stop the engine.
Page 408 ATTACHMENTS ANDD OPTIONS SUPER LONG FRONT BOOM AND ARM EVERY 100 HOURS SERVICE LUBRICATING The minimum greasing interval is 100 hours. However, more frequent greasing will be required depending on conditions/environment 1. Set the work equipment in the greasing posture below, then lower the work equipment to the ground and stop the engine.
Page 409 ATTACHMENTS ANDD OPTIONS SUPER LONG FRONT BOOM AND ARM 4. Bucket cylinder foot pin (1 point) 5. Arm-link coupling pin (1 point) 6. Arm-bucket coupling pin (1 point) AM091470D 7. Link coupling pin (2 points) 8. Bucket cylinder rod end (1 point) 9.
Page 410 ATTACHMENTS ANDD OPTIONS SUPER LONG FRONT BOOM AND ARM 6-50...
Page 411 HIGH REACH DEMOLITION EQUIPMENT 27M WARNING Please read and make sure that you understand the safety volume of the standard machine operation and maintenance manual before reading this section. This chapter describes only the High Reach Demolition machine. Therefore please refer to operation and maintenance section of the standard machine.
Page 412 HIGH REACH DEMOLITION EQUIPMENT 27M GENERAL VIEW OF MACHINE GENERAL VIEW OF MACHINE Attachment Boom cylinder (quantity: two) Bucket cylinder FOPS (10) Idler Arm cylinder (11) Track frame Intermediate Link (12) Sprocket Intermediate Link Cylinder (13) Counterweight Boom (three sections): (7a) Boom 1 (7b) Boom 2 (7c) Boom 3...
Page 413 HIGH REACH DEMOLITION EQUIPMENT 27M GENERAL VIEW OF MACHINE CAUTION ITEMS NOTICE Refer to main machine manual for other Caution Items. CAUTION Do not use the Demolition machine for lifting operations. CAUTION Do not use Power Max function with High reach Demolition Equipment fitted. CAUTION The machine is not suitable for breaker use in any configuration.
Page 414 If the labels are damaged, lost, or cannot be read properly, replace them with new ones. For details of the part numbers for the labels, see this manual or the actual label, and place an order with Komatsu distributor.
Page 415 HIGH REACH DEMOLITION EQUIPMENT 27M POSITION FOR ATTACHING SAFETY LABELS SAFETY LABELS 1. (208-00-KA110) WARNING q Medium Reach Configuration (boom 2 removed). q When the second boom is removed the attachment can hit the operator cab or chassis. q Operate work equipment slowly and carefully to avoid any injury and damage.
Page 416 HIGH REACH DEMOLITION EQUIPMENT 27M CONTROL LEVERS AND SWITCHES CONTROL LEVERS AND SWITCHES Front of levers Front of Levers Safety lock lever Tilting cab control button Travel levers and pedals Boom angle alarm cancel switch Left work equipment control lever High reach/standard configuration change switch Right work equipment control lever Roof wiper switch...
Page 417 HIGH REACH DEMOLITION EQUIPMENT 27M CONTROL LEVERS AND SWITCHES TRAVEL LEVERS WARNING q Do not put your foot on the pedal unless the machine is traveling. If you leave your foot on the pedal and press it by mistake, the machine will move suddenly, and this may lead to a serious accident.
Page 418 HIGH REACH DEMOLITION EQUIPMENT 27M CONTROL LEVERS AND SWITCHES WORK EQUIPMENT CONTROL LEVERS (with auto-deceleration device) This Left work equipment control lever (3) is used to operate the arm and upper structure. Arm operation / Swing operation (a) Arm OUT (b) Arm IN (c) Swing to right (d) Swing to left...
Page 419 HIGH REACH DEMOLITION EQUIPMENT 27M CONTROL LEVERS AND SWITCHES ATTACHMENT ROTATION (with auto-deceleration) q Attachment rotates when the button (6) is operated forward or backward. Direction of rotation depends upon the type of crusher fitted. Standard motion: Operate switch forwards - attachment rotates clockwise Operate switch backwards - attachment rotates anti clockwise (A) The direction of rotation depends on the crusher.
Page 420 HIGH REACH DEMOLITION EQUIPMENT 27M CONTROL LEVERS AND SWITCHES INTERMEDIATE LINK CONTROL PEDAL (with auto-deceleration) WARNING q If any lever is operated when in the deceleration range, the engine speed will suddenly increase, so be careful when operating the levers. q Do not put your foot on the pedal except when operating it.
Page 421 HIGH REACH DEMOLITION EQUIPMENT 27M CONTROL LEVERS AND SWITCHES CRUSHER CONTROL FOR OPENING AND CLOSING OPEN CLOSE WARNING If any lever is operated when in the deceleration range, the engine speed will suddenly increase, so be careful when operating the levers. q When the proportional control switch (11) is operated forward, the attachment is actuated in forward direction.
Page 422 HIGH REACH DEMOLITION EQUIPMENT 27M CONTROL LEVERS AND SWITCHES TILTING CAB MECHANISM OPERATION WARNING q Do not attempt to enter or leave the cab while it is in the raised position, or while the cab is moving. q Do not operate any other hydraulic equipment (travel, work equipment etc.) while operating the tilting mechanism.
Page 423 HIGH REACH DEMOLITION EQUIPMENT 27M CONTROL LEVERS AND SWITCHES BOOM ANGLE ALARM BUZZER CANCEL SWITCH WARNING When carrying out checks before starting, check that the alarm buzzer sounds. Green This machine is equipped with an alarm buzzer to ensure that operations can be carried out in safety.
Page 424 HIGH REACH DEMOLITION EQUIPMENT 27M CONTROL LEVERS AND SWITCHES CEILING WINDOW WIPER SWITCH Roof Wiper Switch This switch (8) is used to turn on the roof wiper and to operate the washer. The switch has 3 positions: (a) ON: is with the rear end of the switch down. The wiper is on. (b) ON: is with the rear end of the switch pressed and held down.
Page 425 HIGH REACH DEMOLITION EQUIPMENT 27M MACHINE OPERATIONS AND CONTROLS MACHINE OPERATIONS AND CONTROLS BEFORE STARTING ENGINE Always carry out the following inspection and maintenance before starting work each day. q Greasing Supply grease to the greasing points shown in the diagram. Boom top pin (1 place) Arm (2 places) Intermediate link cylinder (2 places)
Page 426 HIGH REACH DEMOLITION EQUIPMENT 27M MACHINE OPERATIONS AND CONTROLS FUNCTION CHECK WARNING Make certain that the valves on each side of the first boom section are switched to the correct mode BEFORE starting the engine. The valves control the operation of crusher rotate and the boom release pins.
Page 427 HIGH REACH DEMOLITION EQUIPMENT 27M MACHINE OPERATIONS AND CONTROLS PROHIBITON OF WORK OUTSIDE SPECIFIED WORKING RANGE q Never work outside the specified working range. If you do, the machine may fall over. 13 m Working area WARNING To ensure long life of the work equipment, and to carry out work safely, avoid the following kinds of operation.
Page 428 HIGH REACH DEMOLITION EQUIPMENT 27M MACHINE OPERATIONS AND CONTROLS q Do not use hitting force for demolition work. INCORRECT q Do not use the swing force for hitting operations. INCORRECT q Do not use the dropping force of the machine for operations. INCORRECT q Do not use the travel force of the machine for operations.
Page 429 HIGH REACH DEMOLITION EQUIPMENT 27M MACHINE OPERATIONS AND CONTROLS q Do not use the jaw on one side only. INCORRECT q Do not twist and crush at one blow. INCORRECT q Do not pick up objects and raise or lower them. INCORRECT q When gripping objects, do not use cylinder to shake them.
Page 430 Check the bolts of the bucket cylinder head for looseness. If any bolts loosened, tighten them to the specified torque. If any bolts Matching of piston have been removed, notify your Komatsu distributors. and cylinder head Cylinder stroke end 7-20...
Page 431 HIGH REACH DEMOLITION EQUIPMENT 27M MACHINE OPERATIONS AND CONTROLS PROHIBITION OF WORK WITH HYDRAULIC BREAKER The machine is not suitable for breaker use in any configuration. Do not install a hydraulic breaker for breaking work. If you do, the work equipment will be damaged. WHEN WORKING IN MEDIUM REACH CONFIGURATION When in medium reach configuration (boom 2 removed).
Page 432 HIGH REACH DEMOLITION EQUIPMENT 27M OPERATION OPERATION ADJUSTMENT OF HYDRAULIC VARIABLE GAUGE UNDERCARRIAGE, (Where Fitted) CAUTION There must be plenty of room available to manoeuvre the machine for adjustment of undercarriage. Make sure the operations are carried out in a flat, level, spacious area. 1.
Page 433 HIGH REACH DEMOLITION EQUIPMENT 27M OPERATION OPERATING WORK EQUIPMENT WARNING If any lever is operated when in the deceleration range, the engine speed will suddenly increase, so be careful when operating the levers. WARNING Do not put your foot on the pedal except when operating it. If you rest your foot on the pedal during operations, and you Swing operation depress the pedal by mistake, the attachment may move sud-...
Page 434 HIGH REACH DEMOLITION EQUIPMENT 27M OPERATION ATTACHMENT CONTROL Right pedal (Intermediate link control) Crusher open and close proportional control switch Crusher rotation proportional control switch WARNING If any lever is operated when in the deceleration range, the engine speed will suddenly increase, so be careful when operating the levers.
Page 435 HIGH REACH DEMOLITION EQUIPMENT 27M OPERATION q Operation to open or close crusher RH Lever Open Close RAISING WORK EQUIPMENT Operate the work equipment slowly. In particular, operate the work equipment as slowly as possible during lowering operations. Operate as follows. 1.
Page 436 HIGH REACH DEMOLITION EQUIPMENT 27M OPERATION 3. Extend arm cylinder. Arm cylinder 7-26...
Page 437 HIGH REACH DEMOLITION EQUIPMENT 27M OPERATION WORKING RANGE AND USING RANGE OF BOOM WARNING Be sure to work in the forward and backward direction of the machine. (Set the track frame and the cab in the same direc- tion). Never work in the over side direction. 1.
Page 438 HIGH REACH DEMOLITION EQUIPMENT 27M OPERATION Always use the boom within the range shown by the hatched area in the diagram below. If the boom goes below posture (1), the alarm buzzer will sound. If the alarm buzzer sounds, return the boom to a position where the buzzer stops.
Page 439 (L) so that the buzzer sounds at this position. REMARK Set clearance so that there is no contact even when the boom is moved. WARNING This adjustment should only be performed by Komatsu Certi- fied Mechanics. Failure to adjust properly may result in an unsafe operating condition. 7-29...
Page 440 HIGH REACH DEMOLITION EQUIPMENT 27M OPERATION POSTURE WHEN LEAVING MACHINE WARNING When leaving the operator's compartment, put the machine in the following posture for reasons of safety. 1. When leaving the machine for a long time. 2. When leaving the machine for a short time. 7-30...
Page 441 DEMOLITION DIGGING BOOM INSTALLATION DEMOLITION DIGGING BOOM INSTALLATION AND REMOVAL The Komatsu High Reach Demolition work equipment can be replaced by purpose built Komatsu Demolition Dig- ging Equipment. The Demolition Digging Equipment allows easy removal and separation of demolished material. WARNING q Make sure that all work equipment is safely supported or held and will not fall.
Page 442 HIGH REACH DEMOLITION EQUIP- DEMOLITION DIGGING BOOM INSTALLATION AND REMOVAL WARNING Switch off the machine and place the supplied warning tag onto the safety lock lever. 5. Assemble the work equipment support to the work equipment brackets. The demolition work equipment stand is in two sec- tions.
Page 443 HIGH REACH DEMOLITION EQUIPMENT 27M DEMOLITION DIGGING BOOM INSTALLATION (Step 9) Top of boom (Step 13) Both sides of boom (Step 12) Both sides of boom Safety Plate 9. Disconnect the banked hydraulic connectors on the top of the demolition first boom. (A - connect;...
Page 444 HIGH REACH DEMOLITION EQUIP- DEMOLITION DIGGING BOOM INSTALLATION AND REMOVAL pin retracts pin extends 15. Operate the "Attachment Rotate" function. Left Hand (LH) button makes the pins retract, Right Hand (RH) button makes the pins extend. CAUTION Check that the pins are fully retracted before moving the machine.
Page 445 It is assumed that the demolition digging equipment is complete and resting on the ground, with the boom supported by the Komatsu Digging Equipment Stand (available from your dealer). WARNING Make sure that all personnel are a safe distance from the dig- ging equipment while the machine is moving.
Page 446 HIGH REACH DEMOLITION EQUIP- DEMOLITION DIGGING BOOM INSTALLATION AND REMOVAL 3. Make sure all of the exposed wear surfaces of the demolition digging boom and demolition first boom are clean and show- ing no signs of damage. WARNING Do not extend the boom raise cylinders to lift the Digging Equipment Support off the ground.
Page 447 HIGH REACH DEMOLITION EQUIPMENT 27M DEMOLITION DIGGING BOOM INSTALLATION (Step 15) Top of boom (Step 10, 11) Both sides of boom (Step 12) Both sides of boom Safety Plate pin retracts pin extends 11. Operate the "Attachment Rotate" function. Left Hand (LH) button makes the pins retract, Right Hand (RH) but- ton makes the pins extend.
Page 448 HIGH REACH DEMOLITION EQUIP- DEMOLITION DIGGING BOOM INSTALLATION AND REMOVAL DEMOLITION DIG BOOM/ DEMOLITION BOOM 2 CAUTION HOSES Before reconnecting each hose ensure no foreign matter is in the hydraulic lines and that all connections are clean. 14. Connect the individual quick connector lines, in accordance with the diagram and table.
Page 449 DEMOLITION DIGGING BOOM INSTALLATION REMOVAL OF DEMOLITION DIGGING EQUIPMENT. REMARK A Komatsu demolition digging equipment support system is avail- able through your dealer. It is strongly recommended that this system is used to hold the demolition digging equipment when it is removed.
Page 450 HIGH REACH DEMOLITION EQUIP- DEMOLITION DIGGING BOOM INSTALLATION AND REMOVAL DANGER Take care to ensure all equipment is kept clean. 6. Operate the arm cylinder and boom raise so that the bore in the arm cylinder top matches the bore in the arm end.
Page 451 HIGH REACH DEMOLITION EQUIPMENT 27M PURGING AIR PROCEDURES PURGING AIR PROCEDURES PURGING PROCEDURE TO REMOVE AIR FROM HYDRAULIC CYLINDER LINES. NOTICE Follow this procedure whenever hydraulic circuits have been disconnected and reconnected. 1. Run the engine at low idle speed to extend and retract the cylinder 4 to 5 times. For both extension and retraction, stop the cylinder approximately 100mm before the end of the stroke.
Page 452 HIGH REACH DEMOLITION EQUIPMENT 27M PURGING AIR PROCEDURES 5. For pipe fittings, refer to the parts list for the high reach boom. 2. AIR PURGING OF BOOM CYLINDER LOCK VALVE 1. Air purging of pilot hose. WARNING To prevent accidental operation of the boom cylinder, dis- connect the pilot hose of the control valve at the tee joint (DOWN side) and adapter (UP side) (position i on diagram - close to swivel joint).
Page 453 HIGH REACH DEMOLITION EQUIPMENT 27M PURGING AIR PROCEDURES REMARK Before replacing plug 1, stop the engine and release residual pressure in the piping, while monitoring oil temperature. q Loosen the hexagonal socket headed plug (indicated in figure 1 for paragraph 5 above), using an Allen wrench. q Run the engine at half throttle speed.
Page 454 HIGH REACH DEMOLITION EQUIPMENT 27M PURGING AIR PROCEDURES Figure 3. Mid link PPC line Fig 4 Arm PPC line Figure 2. Drain Line 7-44...
Page 455 HIGH REACH DEMOLITION EQUIPMENT 27M TRANSPORTATION (high reach demolition equip- TRANSPORTATION (high reach demolition equipment fitted) WARNING Please read and make sure that you understand the SAFETY section before reading this section. PROCEDURE FOR LOADING ON TO TRAILER 1. With the work equipment in the standard travel position, align the machine with the trailer. 2.
Page 456 HIGH REACH DEMOLITION EQUIP- TRANSPORTATION (high reach demolition equipment fitted) 6. Carefully lower the work equipment into the parked position. Exit the cab carefully - the floor is higher above the ground than before. 7. Secure the machine and reconnect the trailer neck. If the transport pin is not already installed, install it now. REMARK Carry out this operation in reverse when unloading the machine from the trailer.
Page 457 HIGH REACH DEMOLITION EQUIPMENT 27M TRANSPORTATION (high reach demolition equip- 2. Fit the transport pin, holding the demolition equipment arm to the demolition boom. CAUTION With the transport pin in position, do not operate the arm or mid link. Significant damage to the machine will result. transport pin 3.
Page 458 HIGH REACH DEMOLITION EQUIP- TRANSPORTATION (high reach demolition equipment fitted) APPROACH THE TRAILER 9. Make sure the trailer is firmly secured and will not move when the machine approaches. Take care not to strike the trailer with either the work equipment or the stands. 10.
Page 459 HIGH REACH DEMOLITION EQUIPMENT 27M TRANSPORTATION (high reach demolition equip- DISCONNECT THE EQUIPMENT FROM THE BASE MACHINE 14. Relieve the pressure in the hydraulic circuits by removing the filler cap from the hydraulic oil tank and operating the controls of the machine. CAUTION Make sure that all equipment is clean at all times when removing hydraulic power lines.
Page 460 HIGH REACH DEMOLITION EQUIP- TRANSPORTATION (high reach demolition equipment fitted) 19. Open the valves on the pin retract circuit (left and right side of the demolition first boom) to allow hydraulic pressure to be applied to the retractable pins. (C - closed - no power to pin; D - open - retractable pin will operate) 20.
Page 461 HIGH REACH DEMOLITION EQUIPMENT 27M SPECIFICATIONS SPECIFICATIONS WORKING RANGE (PC450LCD HIGH REACH) Working ranges Unit HIGH REACH Maximum working height (to pin at arm end) 27100 Maximum forward reach 13000 Minimum swing radius of arm end pin (max height) 4100 Tail Swing radius 3740 Height at Max.
Page 462 HIGH REACH DEMOLITION EQUIPMENT 27M SPECIFICATIONS WORKING RANGE (PC450LCD MEDIUM REACH) Working ranges Unit MEDIUM REACH Maximum working height (to pin at arm end) 23140 Maximum forward reach 14410 Minimum swing radius of arm end pin (max height) 3550 Tail Swing radius 3740 Height at Max.
Page 463 HIGH REACH DEMOLITION EQUIPMENT 27M SPECIFICATIONS WORKING RANGE (PC450LCD LOW REACH) Working ranges Unit 2900mm arm 3400mm arm Maximum working height (to bucket teeth) 14580 15190 Maximum Dumping Height (bucket teeth) 10900 11510 Maximum Digging Depth (bucket teeth) 4775 5255 Maximum Vertical Wall Digging Depth 4045 4520...
Page 464 HIGH REACH DEMOLITION EQUIPMENT 27M SPECIFICATIONS WORKING RANGE (PC450LCD DIGGING) Working ranges Unit 2900mm arm 3400mm arm Maximum working height (to bucket teeth) 11470 12150 Maximum Dumping Height (bucket teeth) 8215 8750 Maximum Digging Depth (bucket teeth) 6555 7035 Maximum Vertical Wall Digging Depth 5060 6255 Maximum Digging Reach...
Page 465 HIGH REACH DEMOLITION EQUIPMENT 27M SPECIFICATIONS WEIGHTS AND DIMENSIONS TRANSPORT LENGTH 8315 mm MAX. BOOM HEIGHT (incl. Hyd lines) 1540 mm TRANSPORT WEIGHT 40155 kg* ADDITIONAL WEIGHT FOR HYDRAULICALLY VARIABLE UNDERCARRIAGE 7180 kg ADDITIONAL COUNTERWEIGHT (1460mm x 640mm x 550mm) 5280 kg *Includes 600mm shoes EQUIPMENT...
Page 466 HIGH REACH DEMOLITION EQUIPMENT 27M SPECIFICATIONS TRANSPORTATION (High and Medium Reach work equipment) - PC450LCD7 The height dimensions vary according to the trailer. Obey all state and local laws governing the weight, width and length of the load. Observe all regulations governing wide loads. PC450LCD-8 PC450 LCD-8 (with mid boom)
Page 467 HIGH REACH DEMOLITION EQUIPMENT 27M SPECIFICATIONS TRANSPORTATION (Digging equipment) - PC450LCD CURVED STRAIGHT PC450LCD-8 PC450 LCD-8 (curved position) (straight position) ARM LENGTH (MM) 2900 3400 2900 3400 2995mm 2995mm 2995mm 2995mm Overall width of Upper Structure Overall height of Cab with OPG 3485mm 3485mm 3485mm...
Page 468 HIGH REACH DEMOLITION EQUIPMENT 27M SPECIFICATIONS EXPLANATION OF LIFTING CAPACITY CHART PC450LCD- 8 NOTICE Lifting capacity information presented for information/com- parison only. Machine is not intended for use as crane. LEGEND A : Reach from swing centre B : Bucket hook height OF : Lifting capacity (rating overfront) OS : Lifting capacity (rating overside) LEGEND...
Page 469 INDEX...
Page 470 INDEX...
Page 471 INDEX INDEX <A> GREASE PUMP HOLDER ..........3-108 AFTER STARTING ENGINE ........3-131 AIR CONDITIONER CONTROLS........3-88 <H> ASHTRAY..............3-87 HANDLING MACHINES EQUIPPED WITH KOMTRAX 6-33 ATTACHMENT GUIDE..........6-26 BASIC PRECAUTIONS..........6-33 ATTACHMENT COMBINATIONS ......6-26 HANDLING OIL, FUEL, COOLANT, AND PERFORMING AUXILIARY ELECTRIC POWER.........3-105 OIL CLINIC ..............4-4 HIGH REACH DEMOLITION EQUIPMENT 27M ....7-1 <B>...
Page 472 RECOMMENDED ATTACHMENT OPERATIONS..6-29 HYDRAULIC BREAKER...........6-29 RECOMMENDED FUEL, COOLANT, AND LUBRICANT .............4-12 RECOMMENDED BRANDS, RECOMMENDED QUALITY FOR PRODUCTS OTHER THAN KOMATSU GENUINE OIL ............4-14 <S> SAFETY CRITICAL PARTS ..........4-16 SAFETY CRITICAL PARTS LIST........4-16 SAFETY INFORMATION........1-3,2-2,2-13 SAFETY LABELS ............2-4,7-4 LOCATION OF SAFETY LABELS......2-4 SAFETY MACHINE OPERATION .........2-22...
Page 473 COLOPHON...

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