Komatsu PC750-7 Shop Manual
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Komatsu PC750-7 Shop Manual

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MACHINE MODEL
PC750-7
PC750SE-7
PC750LC-7
PC800-7
PC800SE-7
•
This shop manual may contain attachments and optional equipment that are not available
in your area. Please consult your local Komatsu distributor for those items you may
require. Materials and specifications are subject to change without notice.
•
PC750, 800-7 mounts the SAA6D140E-3 engine.
For details of the engine, see the 6D140-3 Series Engine Shop Manual.
© 2017
All Rights Reserved
Printed in Japan 07-17 (01)
SERIAL NUMBER
20001 and up
20001 and up
20001 and up
40001 and up
40001 and up
SEBM031312
00-1
(12)

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Summary of Contents for Komatsu PC750-7

  • Page 1 40001 and up • This shop manual may contain attachments and optional equipment that are not available in your area. Please consult your local Komatsu distributor for those items you may require. Materials and specifications are subject to change without notice. •...
  • Page 2 GENERAL CONTENTS No. of page 01 GENERAL ..........................01-1 10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD ..........10-1 20 TESTING AND ADJUSTING ................ 20-1 30 DISASSEMBLY AND ASSEMBLY ............. 30-1 90 OTHERS ..........................90-1 00-2 PC750, 800-7 Find manuals at https://best-manuals.com...
  • Page 3 LIST OF REVISED PAGES The affected pages are indicated by the use of the Mark Indication Action required following marks. It is requested that necessary actions be taken to these pages according to the table below. Page to be newly added Page to be replaced Replace Page to be deleted...
  • Page 4 LIST OF REVISED PAGES Time of Time of Time of Time of Time of Mark Page Mark Page Mark Page Mark Page Mark Page revision revision revision revision revision 10-98 10-134 10-174 20-121 20-160 10-99 10-135 10-175 20-122 (10) 20-161 10-100 10-136 10-176...
  • Page 5 LIST OF REVISED PAGES Time of Time of Time of Time of Time of Mark Page Mark Page Mark Page Mark Page Mark Page revision revision revision revision revision 20-204 20-244 20-326 20-366 20-406 20-205 20-245 20-327 20-367 20-408 20-206 20-246 20-328 20-368...
  • Page 6 LIST OF REVISED PAGES Time of Time of Time of Time of Time of Mark Page Mark Page Mark Page Mark Page Mark Page revision revision revision revision revision 20-446 20-537 20-615 20-719 30-15-17 20-447 20-538 20-616 20-720 30-15-18 20-448 20-539 20-617 20-721...
  • Page 7 LIST OF REVISED PAGES Time of Time of Time of Time of Time of Mark Page Mark Page Mark Page Mark Page Mark Page revision revision revision revision revision 30-50 30-90 30-130 30-51 30-91 30-131 30-52 30-92 30-132 30-53 30-93 30-133 30-54 30-94...
  • Page 8 Find manuals at https://best-manuals.com...

  • Page 9: Important Safety Notice

    Proper service and repair is extremely important for safe machine operation. The service and repair techniques recommended by Komatsu and described in this manual are both effective and safe. Some of these techniques require the use of tools specially designed by Komatsu for the specific purpose.

  • Page 10: Safety Notice

    SAFETY SAFETY NOTICE PRECAUTIONS DURING WORK 19.Be sure to assemble all parts again in their origi- nal places. 11.When removing the oil filler cap, drain plug or Replace any damaged parts with new parts. hydraulic pressure measuring plugs, loosen • When installing hoses and wires, be sure them slowly to prevent the oil from spurting out.
  • Page 11 FOREWORD GENERAL FOREWORD GENERAL This shop manual has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate understanding of the product and by showing him the correct way to perform repairs and make judge- ments.

  • Page 12: How To Read The Shop Manual

    DISTRIBUTION AND UPDATING Any additions, amendments or other changes will be Symbol Item Remarks sent to KOMATSU distributors. Get the most up-to- date information before you start any work. Special safety precautions Safety are necessary when per- forming the work.

  • Page 13: Hoisting Instructions

    FOREWORD HOISTING INSTRUCTIONS HOISTING INSTRUCTIONS HOISTING k Heavy parts (25 kg or more) must be lifted Slinging near the edge of the hook may cause the rope to slip off the hook during hoisting, and a serious accident can result. Hooks have max- with a hoist, etc.
  • Page 14 FOREWORD METHOD OF DISASSEMBLING, CONNECTING PUSH-PULL TYPE COUPLER METHOD OF DISASSEMBLING, CONNECTING PUSH-PULL TYPE COUPLER k Before carrying out the following work, release Type 1 the residual pressure from the hydraulic tank. For details, see TESTING AND ADJUSTING, Releasing residual pressure from hydraulic tank.
  • Page 15 FOREWORD METHOD OF DISASSEMBLING, CONNECTING PUSH-PULL TYPE COUPLER Type 2 Type 3 1) Hold the mouthpiece of the tightening portion 1) Hold the mouthpiece of the tightening portion and push body (2) in straight until sliding pre- and push body (2) in straight until sliding pre- vention ring (1) contacts contact surface a of vention ring (1) contacts contact surface a of the hexagonal portion at the male end.

  • Page 16: Coating Materials

    ★ The recommended coating materials such as adhesives, gasket sealants and greases used for disassembly and assembly are listed below. ★ For coating materials not listed below, use the equivalent of products shown in this list. Category Komatsu code Part No. Q’ty Container Main applications, features •...
  • Page 17 FOREWORD COATING MATERIALS Category Komatsu code Part No. Q’ty Container Main applications, features • Used as lubricant for sliding portion (to LM-G 09940-00051 60 g prevent from squeaking). Molybdenum • Used to prevent seizure or scuffling of the disulphide thread when press fitting or shrink fitting.

  • Page 18: Standard Tightening Torque

    FOREWORD STANDARD TIGHTENING TORQUE STANDARD TIGHTENING TORQUE STANDARD TIGHTENING TORQUE TABLE (WHEN USING TORQUE WRENCH) ★ In the case of metric nuts and bolts for which there is no special instruction, tighten to the torque given in the table below. Tightening torque Thread diameter Width across...
  • Page 19 FOREWORD STANDARD TIGHTENING TORQUE TABLE OF TIGHTENING TORQUES FOR SPLIT FLANGE BOLTS ★ In the case of split flange bolts for which there is no special instruction, tighten to the torque given in the table below. Thread diameter Width across flat Tightening torque 59 –...
  • Page 20 FOREWORD STANDARD TIGHTENING TORQUE TIGHTENING TORQUE FOR 102 AND 114 ENGINE SERIES 1) BOLT AND NUTS Use these torques for bolts and nuts (unit: mm) of Cummins Engine. Thread diameter Tightening torque 10 0 2 1.02 0 0.20 24 0 4 2.45 0 0.41 43 0 6 4.38 0 0.61...
  • Page 21 FOREWORD ELECTRIC WIRE CODE ELECTRIC WIRE CODE In the wiring diagrams, various colors and symbols are employed to indicate the thickness of wires. This wire code table will help you understand WIRING DIAGRAMS. Example: 5WB indicates a cable having a nominal number 5 and white coating with black stripe. CLASSIFICATION BY THICKNESS Copper wire Current...

  • Page 22: Conversion Table

    FOREWORD CONVERSION TABLE CONVERSION TABLE METHOD OF USING THE CONVERSION TABLE The Conversion Table in this section is provided to enable simple conversion of figures. For details of the method of using the Conversion Table, see the example given below. EXAMPLE •...
  • Page 23 FOREWORD CONVERSION TABLE Millimeters to Inches 1 mm = 0.03937 in 0.236 0.276 0.315 0.354 0.039 0.079 0.118 0.157 0.197 0.630 0.669 0.709 0.748 0.394 0.433 0.472 0.512 0.551 0.591 0.787 0.827 0.866 0.906 0.945 0.984 1.024 1.063 1.102 1.142 1.181 1.220 1.260...
  • Page 24 FOREWORD CONVERSION TABLE Liter to U.S. Gallon 1l = 0.2642 U.S. Gal 1.585 1.849 2.113 2.378 0.264 0.528 0.793 1.057 1.321 4.227 4.491 4.755 5.019 2.642 2.906 3.170 3.434 3.698 3.963 5.283 5.548 5.812 6.076 6.340 6.604 6.869 7.133 7.397 7.661 7.925 8.189...
  • Page 25 FOREWORD CONVERSION TABLE kgm to ft. lb 1 kgm = 7.233 ft. lb 28.9 36.2 43.4 50.6 57.9 65.1 14.5 21.7 137.4 72.3 79.6 86.8 94.0 101.3 108.5 115.7 123.0 130.2 209.8 144.7 151.9 159.1 166.4 173.6 180.8 188.1 195.3 202.5 217.0 224.2...
  • Page 26 FOREWORD CONVERSION TABLE kg/cm to lb/in 1kg/cm = 14.2233 lb/in 28.4 42.7 56.9 71.1 85.3 99.6 113.8 128.0 14.2 170.7 184.9 199.1 213.4 227.6 241.8 256.0 270.2 142.2 156.5 369.8 384.0 398.3 412.5 284.5 298.7 312.9 327.1 341.4 355.6 512.0 526.3 540.5 554.7...
  • Page 27 FOREWORD CONVERSION TABLE Temperature Fahrenheit-Centigrade Conversion ; a simple way to convert a Fahrenheit temperature reading into a Cen- tigrade temperature reading or vice versa is to enter the accompanying table in the center or boldface col- umn of figures. These figures refer to the temperature in either Fahrenheit or Centigrade degrees.
  • Page 28 FOREWORD UNITS UNITS In this manual, the measuring units are indicated with Internatinal System of units (SI). As for reference, conventionally used Gravitational System of units are indicated in parentheses { Example: N {kg} Nm {kgm} MPa {kg/cm kPa {mmH kPa {mmHg} kW/rpm {HP/rpm} g/kWh {g/HPh}...
  • Page 29 01 GENERAL SPECIFICATION DRAWINGS ........................01- 2 SPECIFICATIONS ............................01- 4 WEIGHT TABLE............................01- 10 FUEL, COOLANT AND LUBRICANTS ......................01- 14 01-1 PC750, 800-7...

  • Page 30: Specification Drawings

    GENERAL SPECIFICATION DRAWINGS SPECIFICATION DRAWINGS BACKHOE SPECIFICATION DIMENSIONS WORKING RANGES 01-2 PC750, 800-7...
  • Page 31 GENERAL SPECIFICATION DRAWINGS DIMENSIONS Item Unit PC750-7 PC750SE-7 PC750LC-7 PC800-7 PC800SE-7 Overall length 14,305 13,030 14,305 13,895 13,030 Overall height 4,660 4,615 4,660 4,850 4,615 Overall width 4,210 4,210 4,310 4,210 4,210 Track shoe width Height of machine cab 3,560...
  • Page 32 GENERAL SPECIFICATION DRAWINGS LOADING SHOVEL SPECIFICATION DIMENSIONS WORKING RANGES 01-3-1 PC750, 800-7...
  • Page 33 GENERAL SPECIFICATION DRAWINGS DIMENSIONS Item Unit PC750-7 (Loading shovel specification) Overall length 9,865 Overall height 5,640 Overall width 4,110 Track shoe width Height of machine cab 3,560 Tail swing radius 4,245 Track overall length 5,810 Length of track on ground 4,500 –...

  • Page 34: Specifications

    GENERAL SPECIFICATIONS SPECIFICATIONS BACKHOE SPECIFICATION Machine model PC750-7 PC750SE-7 Serial Number 20001 and up 20001 and up Bucket capacity Weight of machine 72,500 73,300 Max. digging depth 8,600 7,130 Max. vertical wall depth 5,575 4,080 Max. digging reach 13,740 12,265 Max.
  • Page 35 GENERAL SPECIFICATIONS Machine model PC750-7 PC750SE-7 Serial Number 20001 and up 20001 and up Model SAA6D140E-3 Type 4-cycle, water-cooled, in-line, vertical, direct injection, with turbocharger and aftercooler (air cooled) No. of cylinders – bore × stroke 6 – 140 × 165...
  • Page 36 GENERAL SPECIFICATIONS Machine model PC750LC-7 Serial Number 20001 and up Bucket capacity Weight of machine 78,100 Max. digging depth 8,600 Max. vertical wall depth 5,575 Max. digging reach 13,740 Max. reach at ground level 13,460 Max. digging height 11,840 Max. dumping height 8,145 Max.
  • Page 37 GENERAL SPECIFICATIONS Machine model PC750LC-7 Serial Number 20001 and up Model SAA6D140E-3 Type 4-cycle, water-cooled, in-line, vertical, direct injection, with turbocharger and aftercooler (air cooled) No. of cylinders – bore × stroke 6 – 140 × 165 l {cc} Piston displacement 15.24 {15,240} Flywheel horsepower kW/rpm {HP/rpm}...
  • Page 38 GENERAL SPECIFICATIONS SPECIFICATIONS Machine model PC800-7 PC800SE-7 Serial Number 40001 and up 40001 and up Bucket capacity Weight of machine 76,200 75,700 Max. digging depth 8,445 7,130 Max. vertical wall depth 5,230 4,080 Max. digging reach 13,660 12,265 Max. reach at ground level 13,400 11,945 Max.
  • Page 39 GENERAL SPECIFICATIONS Machine model PC800-7 PC800SE-7 Serial Number 40001 and up 40001 and up Model SAA6D140E-3 Type 4-cycle, water-cooled, in-line, vertical, direct injection, with turbocharger and aftercooler (air cooled) No. of cylinders – bore × stroke 6 – 140 × 165 l {cc} Piston displacement 15.24 {15,240}...
  • Page 40 GENERAL SPECIFICATIONS LOADING SHOVEL SPECIFICATION Machine model PC750-7 Serial Number 20001 and up Bucket capacity Weight of machine 76,000 Max. digging depth 3,535 Max. vertical wall depth — Max. digging reach 10,305 Max. reach at ground level 9,920 Max. digging height 10,635 Max.
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This manual is also suitable for:

Pc750se-7Pc750lc-7Pc800-7Pc800se-7

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