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Komatsu PC20MR-2 Shop Manual

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Machine model
PC20MR-2
•
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.
•
PC20MR-2 mount the 3D76E-5N engine.
•
For details of the engine, see the 68E-88E Series Engine Shop Manual.
© 2004
All Rights Reserved
Printed in Japan 11-04 (02)
Serial number
15001 and up
SEBM037001
00-1
(1)

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Summary of Contents for Komatsu PC20MR-2

  • Page 1 15001 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 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 PC20MR-2 Find manuals at https://best-manuals.com...
  • Page 3 10-107 00-20 10-15 10-46 10-78 10-108 00-21 10-16 10-47 10-79 10-109 00-22 10-17 10-48 10-80 10-110 10-18 10-49 10-81 10-111 10-19 10-50 10-82 10-112 01-1 10-20 10-51 10-83 10-113 01-2 10-21 10-52 10-84 10-114 00-2-1 PC20MR-2 Find manuals at https://best-manuals.com...
  • Page 4 20-229 20-322 20-507 30-11 20-122 20-230 20-323 20-508 30-12 20-123 20-231 20-324 20-510 30-13 20-124 20-232 20-325 20-511 30-14 20-125 20-233 20-326 30-15 20-512 20-126 20-234 20-327 20-514 30-16 20-127 20-235 20-328 20-515 30-17 00-2-2 PC20MR-2 Find manuals at https://best-manuals.com...
  • Page 5 30-24 30-25 30-26 30-27 30-28 30-29 30-30 30-31 30-32 30-33 30-34 30-35 30-36 30-37 30-38 30-39 30-40 30-41 30-42 30-43 30-44 30-45 30-46 30-47 30-48 30-49 30-50 30-51 30-52 30-53 30-54 30-55 90-1 90-3 00-2-3 PC20MR-2 Find manuals at https://best-manuals.com...

  • Page 6: 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 7 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 •...
  • Page 8 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 9: How To Read The Shop Manual

    Distribution and updating Special technical Any additions, amendments or other changes will be precautions or other sent to KOMATSU distributors. Get the most up-to- Caution precautions for preserving date information before you start any work. standards are necessary when performing the work.

  • Page 10: Hoisting Instructions

    Foreword Hoisting instructions Hoisting instructions Hoisting Slinging near the edge of the hook may cause the rope to slip off the hook during Heavy parts (25 kg or more) must be lifted hoisting, and a serious accident can result. with a hoist, etc. In the Disassembly and Hooks have maximum strength at the mid- assembly section, every part weighing 25 dle portion.
  • Page 11 Foreword Method of disassembling, connecting push-pull type coupler Method of disassembling, connecting push-pull type coupler 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. Even if the residual pressure is released from the hydraulic tank, some hydraulic oil flows out when the hose is disconnected.
  • Page 12 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 and push body (2) in straight until sliding prevention ring (1) contacts contact surface a of prevention ring (1) contacts contact surface a of the hexagonal portion at the male end.

  • Page 13: Coating Materials

    The recommended coating materials such as adhesives, gasket sealants and greases used for disassembly and assembly are listed below. a 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 14 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 15: Standard Tightening Torque

    Foreword Standard tightening torque Standard tightening torque Standard tightening torque table (when using torque wrench) a 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 16 Foreword Standard tightening torque Table of tightening torques for flared nuts a In the case of flared nuts for which there is no special instruction, tighten to the torque given in the table below. Thread diameter Width across flats Tightening torque 59 –...
  • Page 17 Foreword Standard tightening torque Tightening torque for 102 engine series 1) Bolt and nuts Use these torques for bolts and nuts (unit: mm) of Cummins Engine. Thread diameter Tightening torque 10 ± 2 1.02 ± 0.20 24 ± 4 2.45 ± 0.41 43 ±...
  • Page 18 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 Norminal...

  • Page 19: 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 20 Foreword Conversion table Millimeters to Inches 1 mm = 0.03937 in 0.039 0.079 0.118 0.157 0.197 0.236 0.276 0.315 0.354 0.394 0.433 0.472 0.512 0.551 0.591 0.630 0.669 0.709 0.748 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 21 Foreword Conversion table Liter to U.S. Gallon 1l = 0.2642 U.S. Gal 0.264 0.528 0.793 1.057 1.321 1.585 1.849 2.113 2.378 2.642 2.906 3.170 3.434 3.698 3.963 4.227 4.491 4.755 5.019 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 22 Foreword Conversion table kgm to ft. lb 1 kgm = 7.233 ft. lb 14.5 21.7 28.9 36.2 43.4 50.6 57.9 65.1 72.3 79.6 86.8 94.0 101.3 108.5 115.7 123.0 130.2 137.4 144.7 151.9 159.1 166.4 173.6 180.8 188.1 195.3 202.5 209.8 217.0 224.2...
  • Page 23 Foreword Conversion table kg/cm to lb/in 1kg/cm = 14.2233 lb/in 14.2 28.4 42.7 56.9 71.1 85.3 99.6 113.8 128.0 142.2 156.5 170.7 184.9 199.1 213.4 227.6 241.8 256.0 270.2 284.5 298.7 312.9 327.1 341.4 355.6 369.8 384.0 398.3 412.5 426.7 440.9 455.1 469.4...
  • Page 24 Foreword Conversion table Temperature Fahrenheit-Centigrade Conversion ; a simple way to convert a Fahrenheit temperature reading into a Centi- grade 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 25 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 {mmH2O} kPa {mmHg} kW/rpm {HP/rpm} g/kWh {g/HPh}...
  • Page 26 01 General Specification dimension drawing ....01- 2 Working range drawing ........01- 3 Specifications ..........01- 4 Weight table ...........01- 7 Lubricants, fuel and coolant specifications..01- 9 01-1 PC20MR-2...
  • Page 27 General Specification dimension drawing Specification dimension drawing Item Unit PC20MR-2 Canopy specification 2,220 Machine weight Cab specification 2,385 Bucket capacity 0.066 Komatsu3D76E-5N Engine model — Diesel engine Rated engine output kW{HP}/rpm 15.5 {20.8} / 2,500 Overall length 3,810 Overall height...
  • Page 28 General Working range drawing Working range drawing Working range (mm) PC20MR-2 Max. digging radius 4,300 Max. digging depth 2,350 Max. digging height 4,100 Max. vertical wall depth 1,950 Max. dumping height 2,820 Swing radius of work equipment 1,790 <Values in ( ) are boom swing radii>...

  • Page 29: Specifications

    General Specifications Specifications PC20MR-2 Machine model Canopy specification Cab specification Serial number 15001 and up Bucket capacity 0.066 0.066 2,220 2,385 Operating weight [2,320] [2,485] Max. digging depth 2,350 2,350 Max. vertical wall depth 1,950 1,950 Max. digging reach 4,300 4,300 Max.
  • Page 30 General Specifications PC20MR-2 Machine model Canopy specification Cab specification Serial number 15001 and up Model 3D76E-5N Type 4-cycle, water cooled, in-line direct injection type, swirl chamber type No. of cylinders - bore x stroke 3 – 76 × 82 l {cc} Piston displacement 1.115 {1,115}...
  • Page 31 This as a preview PDF file from best-manuals.com Download full PDF manual at best-manuals.com...

This manual is also suitable for:

15001

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