Komatsu D51EXi -24 Shop Manual
  1. Manuals
  2. Brands
  3. Komatsu Manuals
  4. Excavators
  5. D51EXi -24
  6. Shop manual
Komatsu D51EXi -24 Shop Manual

Komatsu D51EXi -24 Shop Manual

Bulldozer
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
BULLDOZER
D51EXi
D51PXi
SERIAL NUMBERS
SEN06621-02
-24
-24
D51EXi- 10001
and up
D51PXi- 10001

Advertisement

Table of Contents
loading

Related Manuals for Komatsu D51EXi -24

Summary of Contents for Komatsu D51EXi -24

  • Page 1 SEN06621-02 BULLDOZER D51EXi D51PXi D51EXi- 10001 SERIAL NUMBERS and up D51PXi- 10001...
  • Page 2 Find manuals at https://best-manuals.com...
  • Page 3 00 INDEX AND FOREWORD D51EXI-24, D51PXI-24 00-1 Find manuals at https://best-manuals.com...

  • Page 4: Table Of Contents

    INDEX 00 INDEX AND FOREWORD INDEX 00 INDEX AND FOREWORD ........................00-1 ABBREVIATION LIST ........................... 00-20 FOREWORD, SAFETY, BASIC INFORMATION ................... 00-26 HOW TO READ THE SHOP MANUAL................... 00-26 SAFETY NOTICE FOR OPERATION..................... 00-28 PRECAUTIONS TO PREVENT FIRE..................... 00-36 ACTIONS IF FIRE OCCURS ......................00-38 PRECAUTIONS FOR DISPOSING OF WASTE MATERIALS ............
  • Page 5 00 INDEX AND FOREWORD INDEX LAYOUT DRAWING OF COOLING SYSTEM ................10-73 COOLING FAN CONTROL SYSTEM..................... 10-75 COMPONENT PARTS OF COOLING SYSTEM................10-78 CONTROL SYSTEM..........................10-87 LAYOUT DRAWING OF CONTROL SYSTEM ................10-87 MACHINE MONITOR SYSTEM ..................... 10-88 KOMTRAX SYSTEM........................10-89 COMPONENT PARTS OF CONTROL SYSTEM................

  • Page 6: Index

    INDEX 00 INDEX AND FOREWORD SKETCH OF TOOLS FOR TESTING AND ADJUSTING ............... 30-19 ENGINE AND COOLING SYSTEM....................... 30-23 TEST ENGINE SPEED ........................30-23 TEST BOOST PRESSURE......................30-25 TEST EXHAUST GAS COLOR ...................... 30-27 TEST AND ADJUST VALVE CLEARANCE ..................30-29 TEST COMPRESSION PRESSURE....................
  • Page 7 00 INDEX AND FOREWORD INDEX SET AND OPERATE CONTROL BOX ..................30-285 CALIBRATE BLADE EDGE POSITION ..................30-288 CALIBRATE IMU SENSOR......................30-310 RESET CYLINDER STROKE END ....................30-317 METHOD FOR INPUTTING WEAR AMOUNT OF BLADE EDGE AND TRACK SHOE ....30-320 CHECK BLADE ELEVATION, ADJUST..................30-321 TEST STROKE SENSOR FOR LIFT CYLINDER................30-325 TEST STROKE SENSOR FOR TILT CYLINDER ................30-327 TEST STROKE SENSOR FOR ANGLE CYLINDER ..............30-329...
  • Page 8 INDEX 00 INDEX AND FOREWORD FAILURE CODE [B@BAZG] ......................40-191 FAILURE CODE [B@BCNS] ......................40-192 FAILURE CODE [B@CRNS]......................40-193 FAILURE CODE [B@CRZG]......................40-194 FAILURE CODE [CA115] ......................40-195 FAILURE CODE [CA122] ......................40-196 FAILURE CODE [CA123] ......................40-198 FAILURE CODE [CA131] ......................40-200 FAILURE CODE [CA132] ......................40-202 FAILURE CODE [CA144] ......................40-204 FAILURE CODE [CA145] ......................40-206 FAILURE CODE [CA153] ......................40-208 FAILURE CODE [CA154] ......................40-210...
  • Page 9 00 INDEX AND FOREWORD INDEX FAILURE CODE [CA1117] ......................40-294 FAILURE CODE [CA1664] ......................40-296 FAILURE CODE [CA1669] ......................40-298 FAILURE CODE [CA1673] ......................40-299 FAILURE CODE [CA1677] ......................40-300 FAILURE CODE [CA1678] ......................40-301 FAILURE CODE [CA1682] ......................40-302 FAILURE CODE [CA1683] ......................40-304 FAILURE CODE [CA1684] ......................40-306 FAILURE CODE [CA1686] ......................40-308 FAILURE CODE [CA1691] ......................40-309 FAILURE CODE [CA1694] ......................40-311...
  • Page 10 INDEX 00 INDEX AND FOREWORD FAILURE CODE [CA3148] ......................40-393 FAILURE CODE [CA3151] ......................40-395 FAILURE CODE [CA3165] ......................40-400 FAILURE CODE [CA3228] ......................40-402 FAILURE CODE [CA3229] ......................40-404 FAILURE CODE [CA3231] ......................40-406 FAILURE CODE [CA3232] ......................40-408 FAILURE CODE [CA3235] ......................40-412 FAILURE CODE [CA3239] ......................40-414 FAILURE CODE [CA3241] ......................40-417 FAILURE CODE [CA3242] ......................40-420 FAILURE CODE [CA3251] ......................40-423...
  • Page 11 00 INDEX AND FOREWORD INDEX FAILURE CODE [CA4169] ......................40-531 FAILURE CODE [CA4171] ......................40-533 FAILURE CODE [CA4249] ......................40-536 FAILURE CODE [CA4251] ......................40-538 FAILURE CODE [CA4261] ......................40-541 FAILURE CODE [CA4277] ......................40-544 FAILURE CODE [CA4459] ......................40-547 FAILURE CODE [CA4461] ......................40-549 FAILURE CODE [CA4533] ......................40-552 FAILURE CODE [CA4534] ......................40-553 FAILURE CODE [CA4731] ......................40-554 FAILURE CODE [CA4732] ......................40-555...
  • Page 12 INDEX 00 INDEX AND FOREWORD FAILURE CODE [DAJLKB] ......................40-646 FAILURE CODE [DAJPMA] ......................40-648 FAILURE CODE [DAJQKR] ......................40-649 FAILURE CODE [DAJRKR]......................40-650 FAILURE CODE [DB2QKR] ......................40-651 FAILURE CODE [DB2RKR] ......................40-656 FAILURE CODE [DBR0KT]......................40-661 FAILURE CODE [DBR0MC]......................40-662 FAILURE CODE [DBR1KK]......................40-663 FAILURE CODE [DBR2KK]......................40-666 FAILURE CODE [DBR5KK]......................40-669 FAILURE CODE [DBRLKA]......................40-671 FAILURE CODE [DBRLKB]......................40-673...
  • Page 13 00 INDEX AND FOREWORD INDEX FAILURE CODE [DHH7KB] ......................40-768 FAILURE CODE [DHH8KA] ......................40-770 FAILURE CODE [DHH8KB] ......................40-773 FAILURE CODE [DHH9KA] ......................40-775 FAILURE CODE [DHH9KB] ......................40-778 FAILURE CODE [DHHAKA] ......................40-780 FAILURE CODE [DHHAKB] ......................40-783 FAILURE CODE [DK30KA] ......................40-785 FAILURE CODE [DK30KB] ......................40-788 FAILURE CODE [DK30KX] ......................40-790 FAILURE CODE [DK30KZ] ......................40-791 FAILURE CODE [DK30L8] ......................40-792...
  • Page 14 INDEX 00 INDEX AND FOREWORD FAILURE CODE [DR21KX] ......................40-868 FAILURE CODE [DR31KX] ......................40-869 FAILURE CODE [DV20KB] ......................40-870 FAILURE CODE [DW4BKA]......................40-872 FAILURE CODE [DW4BKB]......................40-874 FAILURE CODE [DW4BKY]......................40-876 FAILURE CODE [DW7BKA]......................40-878 FAILURE CODE [DW7BKB]......................40-880 FAILURE CODE [DW7EKA]......................40-882 FAILURE CODE [DW7EKB]......................40-884 FAILURE CODE [DW7EKY]......................40-886 FAILURE CODE [DWN5KA]......................40-888 FAILURE CODE [DWN5KB]......................40-890 FAILURE CODE [DWN5KY]......................40-892...
  • Page 15 E-43 CONTROL BOX DISPLAYS THE MESSAGE [IMU sensor not connected]......40-1059 E-44 CONTROL BOX DISPLAYS THE MESSAGE [Waiting for satellites...]........40-1060 E-45 CONTROL BOX DISPLAYS THE MESSAGE [Komatsu controller not connected!] ....40-1061 E-46 CONTROL BOX DISPLAYS THE MESSAGE [Cylinder Stroke Reading Abnormal]....40-1063 E-47 CONTROL BOX DISPLAYS THE MESSAGE [Komatsu CAN Comms Abnormal] ....40-1064...
  • Page 16 INDEX 00 INDEX AND FOREWORD E-50 CONTROL BOX DISPLAYS THE MESSAGE [System Initializing]........40-1067 E-51 CONTROL BOX DISPLAYS THE MESSAGE [Initializing..]..........40-1068 E-52 CONTROL BOX DISPLAYS THE MESSAGE [Configuring GPS]........40-1069 E-53 CONTROL BOX DISPLAYS THE MESSAGE [No GPS Localization...].......40-1070 E-54 CONTROL BOX DISPLAYS THE MESSAGE [Low precisions...]........40-1071 E-55 CONTROL BOX DISPLAYS THE MESSAGE [Heading Initializing] ........40-1072 E-56 CONTROL BOX DISPLAYS [Out of design area...].............40-1073 E-57 CONTROL BOX CAN NOT BE TURNED ON ..............40-1074...
  • Page 17 00 INDEX AND FOREWORD INDEX H-10 UNUSUAL NOISE IS HEARD FROM AROUND HST PUMP OR MOTOR ......40-1132 H-11 HST OIL TEMPERATURE (HYDRAULIC OIL TEMPERATURE) RISES TOO HIGH ..40-1134 H-12 ALL WORK EQUIPMENT DO NOT OPERATE ..............40-1136 H-13 ALL WORK EQUIPMENTS SPEED OR POWER IS LOW ..........40-1138 H-14 BLADE LIFT SPEED OR POWER IS LOW ................40-1139 H-15 BLADE TILT SPEED OR POWER IS LOW ................40-1141 H-16 BLADE ANGLE SPEED OR POWER IS LOW..............40-1142...
  • Page 18 INDEX 00 INDEX AND FOREWORD REMOVE AND INSTALL EGR COOLER ASSEMBLY..............50-150 REMOVE AND INSTALL STARTING MOTOR ASSEMBLY ............50-158 REMOVE AND INSTALL AIR CONDITIONER COMPRESSOR BELT ..........50-163 REMOVE AND INSTALL ALTERNATOR BELT ................50-172 REMOVE AND INSTALL AUTOMATIC TENSIONER..............50-177 REMOVE AND INSTALL RADIATOR ASSEMBLY ................50-180 REMOVE AND INSTALL HYDRAULIC OIL COOLER ASSEMBLY ..........50-197 REMOVE AND INSTALL AFTERCOOLER ASSEMBLY..............50-208 REMOVE AND INSTALL COOLING FAN DRIVE ASSEMBLY ............50-222...
  • Page 19 00 INDEX AND FOREWORD INDEX REMOVE AND INSTALL BLADE ASSEMBLY ................50-609 REMOVE AND INSTALL STROKE SENSING BLADE LIFT CYLINDER ASSEMBLY ....50-617 DISASSEMBLE AND ASSEMBLE STROKE SENSING BLADE LIFT CYLINDER ASSEMBLY ..50-621 REMOVE AND INSTALL STROKE SENSING BLADE TILT CYLINDER ASSEMBLY ....50-634 DISASSEMBLE AND ASSEMBLE STROKE SENSING BLADE TILT CYLINDER ASSEMBLY..50-642 REMOVE AND INSTALL STROKE SENSING BLADE ANGLE CYLINDER ASSEMBLY ....50-651 DISASSEMBLE AND ASSEMBLE STROKE SENSING BLADE ANGLE CYLINDER ASSEMBLY50-657...
  • Page 20 INDEX 00 INDEX AND FOREWORD MAINTENANCE STANDARD OF HYDRAULIC TANK ..............60-43 MAINTENANCE STANDARD OF WORK EQUIPMENT AND COOLING FAN PUMP ....60-44 MAINTENANCE STANDARD OF CONTROL VALVE..............60-47 MAINTENANCE STANDARD OF RIPPER PPC VALVE..............60-53 MAINTENANCE STANDARD OF 5-PORT VALVE OF EPC AND SOLENOID ....... 60-55 MAINTENANCE STANDARD OF QUICK DROP VALVE..............
  • Page 21 00 INDEX AND FOREWORD INDEX HANDLE COMPRESSOR OIL ......................80-61 90 CIRCUIT DIAGRAMS ..........................90-1 CONTENTS ............................90-2 ABBREVIATION LIST ..........................90-3 HYDRAULIC CIRCUIT DIAGRAM ......................90-9 SYMBOLS USED IN HYDRAULIC CIRCUIT DIAGRAM ..............90-9 HYDRAULIC CIRCUIT DIAGRAM ....................90-13 ELECTRICAL CIRCUIT DIAGRAM .......................
  • Page 22 ABBREVIATION LIST 00 INDEX AND FOREWORD ABBREVIATION LIST • This list of abbreviations includes the abbreviations used in the text of the shop manual for parts, compo- nents, and functions whose meaning is not immediately clear. The spelling is given in full with an outline of the meaning.
  • Page 23 00 INDEX AND FOREWORD ABBREVIATION LIST Purpose of use (major ap- Abbrevia- Actual word spelled out plicable machine (*1), or Explanation tion component/system) Electronic control device uses the signals from Electronic Control Mod- the sensors on the machine. These signals indi- Electronic control system cate the optimum actuation to the actuators.
  • Page 24 Inlet Metering Valve Engine discharged volume of supply pump. (Same as IMA) This mechanism separates oil in blowby gas and Komatsu Closed Crank- KCCV Engine returns it to the intake side to combust it there. It case Ventilation primarily consists of filters.
  • Page 25 00 INDEX AND FOREWORD ABBREVIATION LIST Purpose of use (major ap- Abbrevia- Actual word spelled out plicable machine (*1), or Explanation tion component/system) Characteristics of electrical or hydraulic circuits. Electrical system, Hydraul- Normally Open Circuit is normally open if it is not actuated, and it ic system closes when it is actuated.
  • Page 26 ABBREVIATION LIST 00 INDEX AND FOREWORD Purpose of use (major ap- Abbrevia- Actual word spelled out plicable machine (*1), or Explanation tion component/system) Variable Geometry Tur- The turbocharger on which the cross-section Engine bocharger area of the exhaust passage is made variable. Finely controls the maximum output of the ma- Variable HorsePower VHPC...
  • Page 27 00 INDEX AND FOREWORD ABBREVIATION LIST Abbreviation Actual word spelled out SPEC Specification Switch TEMP Temperature Torque Converter Transmission D51EXI-24, D51PXI-24 00-25...

  • Page 28: 00 Index And Foreword

    REMARK • Some of the attachments and options described in this shop manual may not be available in some areas. If they are required, consult your Komatsu distributor. • The materials and specifications are subject to change without notice. • Shop Manuals are available for "machine part" and "engine part". For the engine unit, see the shop manual for the machine which has the same engine model.
  • Page 29 00 INDEX AND FOREWORD HOW TO READ THE SHOP MANUAL Symbols Important safety and quality portions are marked with the following symbols so that shop manual is used effec- tively. Symbol Item Remark This signal indicates an extremely hazardous situation which will result in Danger death or serious injury if it is not avoided.

  • Page 30: Safety Notice For Operation

    Appropriate servicing and repair are extremely important to ensure safe operation of the machine. The shop manuals describe the effective and safe servicing and repair methods recommended by Komatsu. Some of the servicing and repair methods require the use of special tools designed by Komatsu for special purpos- •...
  • Page 31 00 INDEX AND FOREWORD SAFETY NOTICE FOR OPERATION • Always wear the protective eyeglasses when hitting parts with a hammer. • Always wear the protective eyeglasses when grinding parts with a grinder, etc. • When performing any operation with multiple workers, al- ways agree on the operating procedure before starting.
  • Page 32 SAFETY NOTICE FOR OPERATION 00 INDEX AND FOREWORD • Release the remaining pressure from the circuit before starting the work of disconnecting and removing of oil, fuel, water, or air from the circuit. When removing the cap of oil filter, drain plug, or oil pressure plug, it should be done slowly otherwise the oil spills.
  • Page 33 00 INDEX AND FOREWORD SAFETY NOTICE FOR OPERATION • Be sure to assemble all parts again in their original places. Replace any damaged parts and parts which must not be reused with new parts. When installing hoses and wiring harnesses, be sure that they will not be damaged by contact with other parts when the machine is operated.
  • Page 34 SAFETY NOTICE FOR OPERATION 00 INDEX AND FOREWORD REMARK When slinging a load with 2 or more ropes, the force sub- jected to each rope increases with the hanging angle. The figure below shows the variation of allowable load in kN {kg} when slinging is made with 2 ropes, each of which is allowed to sling up to 9.8 kN {1000 kg} ...
  • Page 35 00 INDEX AND FOREWORD SAFETY NOTICE FOR OPERATION REMARK Weight of component whose weight is heavier than 25 kg is shown with symbol in "DISASSEMBLY AND ASSEMBLY". • Before starting work, check the wire ropes, brake, clutch, controller, rails, over winding prevention device, ground fault circuit interrupter for electric shock prevention, crane collision prevention device, and energiz- ing caution lamp, and check the following safety items.
  • Page 36 SAFETY NOTICE FOR OPERATION 00 INDEX AND FOREWORD Precautions for disconnecting air conditioner piping NOTICE When replacing the air conditioner unit, air conditioner compressor, condenser or receiver drier, etc., collect the refrigerant (air conditioner gas: R134a) from the air conditioner circuit before disconnecting the air conditioner hoses.
  • Page 37 00 INDEX AND FOREWORD SAFETY NOTICE FOR OPERATION REMARK • The figure shows an example of fitting of O-ring. • An O-ring is fitted to every joint of the air conditioner piping. For tightening torques, see THE OTHER INFORMATION, "Pre- cautions for disconnection and connection of air conditioner piping".

  • Page 38: Precautions To Prevent Fire

    Fire around the machine due to highly heated exhaust gas Some models and specifications may be equipped with KDPF (Komatsu Diesel Particulate Filter). KDPF is a system for purifying exhaust gas by removing soot in exhaust gas. In the process of purification (re- generation), the temperature of discharged exhaust gas may be higher than that of conventional models.
  • Page 39 00 INDEX AND FOREWORD PRECAUTIONS TO PREVENT FIRE • When there are thatched houses, dry leaves or pieces of paper near the work site, set the system to disa- ble the regeneration before starting work to prevent fire hazards due to highly heated exhaust gas caused by KDPF regeneration.

  • Page 40: Actions If Fire Occurs

    ACTIONS IF FIRE OCCURS 00 INDEX AND FOREWORD ACTIONS IF FIRE OCCURS • Turn the starting switch to OFF position to stop the engine. • Use the handrails and steps to get off the machine. • Do not jump off the machine. You may fall and suffer serious injury. •...

  • Page 41: Precautions For Disposing Of Waste Materials

    00 INDEX AND FOREWORD PRECAUTIONS FOR DISPOSING OF WASTE MATERIALS PRECAUTIONS FOR DISPOSING OF WASTE MATERIALS To prevent pollution, pay full attention to the way to dispose of waste materials. • Always drain the oil from your machine in containers. Nev- er drain the oil and coolant directly onto the ground or dump into the sewage system, rivers, seas, or lakes.

  • Page 42: Actions Taken To Meet Exhaust Gas Regulations

    This machine is equipped with the following two exhaust gas treatment systems: • Komatsu Diesel Particulate Filter (hereafter KDPF): A device which captures soot in the exhaust gas to pu- rify exhaust gas. This process performs the combustion of soot referred to as "regeneration".

  • Page 43: Precautions For Def

    00 INDEX AND FOREWORD PRECAUTIONS FOR DEF PRECAUTIONS FOR DEF GENERAL CHARACTER AND PRECAUTIONS FOR HANDLING DEF is a colorless transparent 32.5% aqueous urea solution. Urea as main constituent is a material which is used for cosmetics, medical and pharmaceutical products, and fertilizer, etc. The following situations require im- mediate action: •...

  • Page 44: Store Adblue/Def

    STORE AdBlue/DEF 00 INDEX AND FOREWORD STORE AdBlue/DEF • If the temperature of AdBlue/DEF becomes high, harmful ammonia gas may be generated. Completely seal up its container for storage. Only open containers in a well-ventilated area. • Store AdBlue/DEF avoiding direct sunlight. Always use the original container at the time of purchase. Do not exchange the container of AdBlue/DEF with another one.

  • Page 45: Precautions For Handling Hydraulic Equipment

    00 INDEX AND FOREWORD PRECAUTIONS FOR HANDLING HYDRAULIC EQUIPMENT PRECAUTIONS FOR HANDLING HYDRAULIC EQUIPMENT Because of the higher pressure and more precise hydraulic components, the most common cause of a failure is dust (foreign material) in the hydraulic circuit. The special care must be taken when adding hydraulic oil, or when disassembling, or assembling the hydraulic components.
  • Page 46 PRECAUTIONS FOR HANDLING HYDRAULIC EQUIPMENT 00 INDEX AND FOREWORD Preventing intrusion of foreign materials during refilling • During refilling with the hydraulic oil, do not let water enter the electrical components. • Clean the oil filler port and its around, refilling pump, oil jug, or etc.
  • Page 47 00 INDEX AND FOREWORD PRECAUTIONS FOR HANDLING HYDRAULIC EQUIPMENT REMARK The oil cleaning equipment can remove the ultra fine (approxi- mately 3 μm) particles that the filter built in the hydraulic equip- ment cannot remove. So, it is very effective device. D51EXI-24, D51PXI-24 00-45...

  • Page 48: Precautions For Disconnection And Connection Of Pipings

    PRECAUTIONS FOR DISCONNECTION AND CONNECTION OF PIP- INGS 00 INDEX AND FOREWORD PRECAUTIONS FOR DISCONNECTION AND CONNECTION OF PIPINGS When performing "testing and adjusting" of the machine, "removal and installation" and "disassembly and as- sembly" of the components, observe the following precautions. Precautions for removal and disassembling work •...
  • Page 49 PRECAUTIONS FOR DISCONNECTION AND CONNECTION OF PIP- 00 INDEX AND FOREWORD INGS Introduction of parts for the disconnection of the taper seal type hoses and tubes Hose side Pipe joint side Nominal No. Plug (1) Nut (2) 07376-50210 07222-00210 07376-50315 07222-00312 07376-50422 07222-00414...
  • Page 50 PRECAUTIONS FOR DISCONNECTION AND CONNECTION OF PIP- INGS 00 INDEX AND FOREWORD Bolt pitch (mm) Hose side Tube side Nomi O-ring (4) Bolt (5) Washer (6) Split flange Sleeve head Flange (1) 58.7 30.2 07379-01250 07371-31255 07378-11200 07000-13038 07372-51035 01643-51032 66.7 31.8 07379-01260 07371-51260 07378-11210 07000-13038 01010-81245 01643-51232...
  • Page 51 PRECAUTIONS FOR DISCONNECTION AND CONNECTION OF PIP- 00 INDEX AND FOREWORD INGS Introduction of parts for the removal of taper pipe thread type joint Plug (1) Nominal Nominal No. thread size Square head type (A) Hexagonal socket head (B) 07042-00108 07043-00108 07042-00211 07043-00211...
  • Page 52 When the coolant is drained, be sure that the drain valve is securely tightened, then refill the coolant reser- voir with the coolant Komatsu recommends to the specified level. Start the engine to circulate the coolant in the piping, and add the coolant to the specified level again.
  • Page 53 PRECAUTIONS FOR DISCONNECTION AND CONNECTION OF PIP- 00 INDEX AND FOREWORD INGS Fuel system Check that there is no damage on the pipings, no looseness on mounting bolts, nuts and clamps, and no fuel leak from connecting portion. If there is any looseness, damage, or fuel leak, retighten or repair the part. Check the exhaust equipment and its installation portion for looseness and damage.

  • Page 54: Precautions For Handling Electrical Equipment

    PRECAUTIONS FOR HANDLING ELECTRICAL EQUIPMENT 00 INDEX AND FOREWORD PRECAUTIONS FOR HANDLING ELECTRICAL EQUIPMENT To maintain the performance of the machine over a long period, and to prevent failures or troubles before they occur, correct "operation", "maintenance and inspection" "troubleshooting", and "repairs" must be performed. This section deals particularly with correct repair procedures for mechatronics components and is aimed at im- proving the quality of repairs.
  • Page 55 00 INDEX AND FOREWORD PRECAUTIONS FOR HANDLING ELECTRICAL EQUIPMENT Disconnection in wiring If the wiring harness is pulled to disconnect the connector, or the components are lifted with a crane while the wiring harness is still connected, or a heavy object hits the wiring harness, it may separate the crimping of the connector, or damage the sol- dering, or break the wiring harness.

  • Page 56: Precautions For Handling Fuel System Equipment

    If a filter oth- er than a Komatsu genuine filter is used, fuel system contamination and damage may occur. Therefore Komatsu recommends using only Komatsu fuel filters and install them following the procedures in the shop manual.

  • Page 57: Precautions For Handling Intake System Equipment

    00 INDEX AND FOREWORD PRECAUTIONS FOR HANDLING INTAKE SYSTEM EQUIPMENT PRECAUTIONS FOR HANDLING INTAKE SYSTEM EQUIPMENT The machines equipped with Variable Geometry Turbocharger (VGT) consists of more precise parts (variable system)than the parts used in the conventional turbocharger. If foreign material enters this system, it may cause a failure.

  • Page 58: Practical Use Of Komtrax

    To propose the periodic inspection (Pm clinic, etc.) according to the service meter reading. How to operate KOMTRAX For the operating method of each screen of KOMTRAX, ask KOMTRAX key person in your Komatsu distributor. 00-56 D51EXI-24, D51PXI-24...

  • Page 59: Disconnect And Connect Push-Pull Type Coupler

    00 INDEX AND FOREWORD DISCONNECT AND CONNECT PUSH-PULL TYPE COUPLER DISCONNECT AND CONNECT PUSH-PULL TYPE COUPLER REMARK • Loosen the oil filler cap of the hydraulic tank slowly to release the remaining pressure in the hydraulic tank. • Provide an oil container to receive oil since some hydraulic oil flows out when the hose is disconnected even after the remaining pressure is released from the hydraulic tank.
  • Page 60 DISCONNECT AND CONNECT PUSH-PULL TYPE COUPLER 00 INDEX AND FOREWORD After inserting the hose in the mating adapter perfectly, pull it back to check the connecting condition. REMARK When the hose fitting is pulled back, the rubber cap moves approximately 3.5 mm toward the hose, but it is not a prob- lem.
  • Page 61 This as a preview PDF file from best-manuals.com Download full PDF manual at best-manuals.com...

This manual is also suitable for:

D51pxi -24

Table of Contents