Komatsu ecot3 WA500-6 Shop Manual
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Komatsu ecot3 WA500-6 Shop Manual

Komatsu ecot3 WA500-6 Shop Manual

Wheel loader
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SEN05647-00
WHEEL LOADER
WA500
-6
55739
SERIAL NUMBERS
and up
Stone Handling Spec.

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Summary of Contents for Komatsu ecot3 WA500-6

  • Page 1 SEN05647-00 WHEEL LOADER WA500 55739 SERIAL NUMBERS and up Stone Handling Spec.

  • Page 2: Index And Foreword

    WHEEL LOADER WA500-6 1SHOP MANUAL Machine model Serial number WA500-6 55739 and up 00 Index and foreword WA500-6 00-1...

  • Page 3: Table Of Contents

    Table of contents Table of contents 00 Index and foreword Table of contents..........................00- 2 Table of contents........................00- 2 Foreword............................00- 3 Before reading this manual...................... 00- 3 10 Structure, function and maintenance standard Hydraulic system..........................10- 4 Control valve..........................10- 4 20 Standard value table Standard service value table......................20- 3 Standard service value table for chassis .................

  • Page 4: Foreword

    Foreword Before reading this manual Foreword Before reading this manual This shop manual describes only the different part from the standard machine (WA500-6: S/N 55001 and up). For the component that is not described in this manual, refer the shop manual for the standard machine (WA500-6: S/N 55001 and up).
  • Page 5 Foreword Before reading this manual 00-4 WA500-6...

  • Page 6: Structure, Function And Maintenance Standard

    WHEEL LOADER WA500-6 1SHOP MANUAL Machine model Serial number WA500-6 55739 and up 10 Structure, function and maintenance standard WA500-6 10-1...
  • Page 7 Contents Contents 10 Structure, function and maintenance standard Hydraulic system..........................10- 4 Control valve ............................ 10- 4 10-2 WA500-6...
  • Page 8 Contents WA500-6 10-3...

  • Page 9: Hydraulic System

    Hydraulic system Control valve Hydraulic system Control valve Outline To bucket cylinder bottom To lift arm cylinder bottom To lift arm cylinder bottom To bucket cylinder head To lift arm cylinder head To bucket cylinder head Pressure sensor installation port From front work equipment hydraulic pump From rear work equipment hydraulic pump PA1:...
  • Page 10 Hydraulic system Control valve Outside view WA500-6 10-5...
  • Page 11 Hydraulic system Control valve Sectional view (1/6) 10-6 WA500-6...
  • Page 12 Hydraulic system Control valve Load check valve (Bucket bottom) Load check valve (Lift arm bottom) Load check valve (Lift arm Hi) and (Lift arm bottom) Load check valve (Bucket Hi) and (Bucket head) Pressure compensation valve (Lift arm head) Load check valve (Bucket head) Unit: mm Check item Criteria...
  • Page 13 Hydraulic system Control valve (2/6) 10-8 WA500-6...
  • Page 14 Hydraulic system Control valve Spool (Lift arm Hi) Spool (Bucket Hi) Spool (Lift arm) Spool (Bucket) Unit: mm Check item Criteria Remedy Standard size Repair limit Free length Installed Installed Free Installed x Outside 5 Spool return spring length load length load diameter...
  • Page 15 Hydraulic system Control valve (3/6) 10-10 WA500-6...
  • Page 16 Hydraulic system Control valve Suction safety valve (Bucket bottom) Suction valve (Lift arm Hi) Suction valve (Bucket Hi) Suction safety valve (Lift arm head) Suction safety valve (Bucket head) Suction safety valve (Lift arm bottom) Unit: mm Check item Criteria Remedy Standard size Repair limit...
  • Page 17 Hydraulic system Control valve (4/6) 10-12 WA500-6...
  • Page 18 Hydraulic system Control valve Unload valve Bucket valve EPC valve (Dump) Load check valve (Dump) Load check valve (Tilt) EPC valve (Tilt) Suction safety valve (Tilt) Spool Suction safety valve (Dump) WA500-6 10-13...
  • Page 19 Hydraulic system Control valve (5/6) 10-14 WA500-6...
  • Page 20 Hydraulic system Control valve Lift arm valve EPC valve (Lower and float) Load check valve (Lift) LS shuttle valve Pressure compensation valve (Lower) EPC valve (Raise) Suction safety valve (Lower and float) Suction valve (Lower and float) Spool Suction safety valve (Lift) Unit: mm Check item Criteria...
  • Page 21 Hydraulic system Control valve (6/6) 10-16 WA500-6...
  • Page 22 Hydraulic system Control valve Lift arm Hi and bucket Hi valves Load check valve (Lift arm Hi) Spool (Lift arm Hi) Load check valve (Bucket Hi) Spool (Bucket Hi) Suction valve (Bucket Hi) and (Lift arm Hi) Unload valve Main relief valve LS bypass valve WA500-6 10-17...
  • Page 23 Hydraulic system 10-18 WA500-6...

  • Page 24: Standard Value Table

    WHEEL LOADER WA500-6 1SHOP MANUAL Machine model Serial number WA500-6 55739 and up 20 Standard value table WA500-6 20-1...
  • Page 25 Contents Contents 20 Standard value table Standard service value table ........................ 20- 3 Standard service value table for chassis..................20- 3 20-2 WA500-6...

  • Page 26: Standard Service Value Table

    Standard service value table Standard service value table for chassis Standard service value table Standard service value table for chassis Machine model WA500-6 Standard value Service limit Item Measurement conditions Unit for new machine value N o FORWARD, 5.9 ± 2.9 5.9 ±...
  • Page 27 Standard service value table Standard service value table for chassis Machine model WA500-6 Standard value Service limit Item Measurement conditions Unit for new machine value • Engine stopped Play Max. 40 50 – 100 • Machine facing straight to front •...
  • Page 28 Standard service value table Standard service value table for chassis Machine model WA500-6 Standard value Service limit Item Measurement conditions Unit for new machine value 3.34 ± 0.15 3.34 ± 0.15 Low idle (*1) {34 ± 1.5} {34 ± 1.5} Main relief pressure 3.64 ±...
  • Page 29 Standard service value table Standard service value table for chassis Machine model WA500-6 Standard value Service limit Item Measurement conditions Unit for new machine value 7.7 ± 0.4 7.7 ± 0.4 12.5 ± 0.6 12.5 ± 0.6 (14.2 ± 0.7) (14.2 ±...
  • Page 30 Standard service value table Standard service value table for chassis Machine model WA500-6 Standard value Service limit Item Measurement conditions Unit for new machine value When brake 3.53 ± 0.15 3.53 ± 0.15 Parking • Torque converter oil tempera- released {36 ±...
  • Page 31 Standard service value table Standard service value table for chassis Machine model WA500-6 Standard value Service limit Item Measurement conditions Unit for new machine value Retraction of lift arm cylin- • Hydraulic oil temperature: Within Max. 40 Max. 40 der rod operating range •...
  • Page 32 Standard service value table Standard service value table for chassis Machine posture and procedure for performance measurement a Fig. A a Fig. D a Fig. B a Fig. E a Fig. C a Fig. F WA500-6 20-9...
  • Page 33 Standard service value table Standard service value table for chassis a Fig. G a Fig. K a Fig. H a Fig. J 20-10 WA500-6...

  • Page 34: 90 Diagrams And Drawings

    WHEEL LOADER WA500-6 1SHOP MANUAL Machine model Serial number WA500-6 55739 and up 90 Diagrams and drawings WA500-6 90-1...
  • Page 35 Contents Contents 90 Diagrams and drawings Hydraulic diagrams and drawings ......................90- 3 Work equiment hydraulic circuit diagram ..................90- 3 90-2 WA500-6...

  • Page 36: Work Equipment Hydraulic Circuit Diagram

    Hydraulic diagrams and drawings Work equipment hydraulic circuit diagram Hydraulic diagrams and drawings Work equipment hydraulic circuit diagram WA500-6 90-3...
  • Page 38 WA500-6 WHEEL LOADER Form No. SEN05647-00 © 2011 KOMATSU All Rights Reserved Printed in Japan 03-11...

This manual is also suitable for:

Ecot3 55739

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