Komatsu WA270-8 Wheel Loader Service Repair Manual

Table of Contents – WA270-8 Repair Manual

00 INDEX AND FOREWORD

• INDEX
• ABBREVIATION LIST
• FOREWORD, SAFETY, BASIC INFORMATION

01 SPECIFICATIONS

• CONTENTS
• ABBREVIATION LIST
• SPECIFICATIONS

10 STRUCTURE AND FUNCTION

• CONTENTS
• ABBREVIATION LIST
• UREA SCR SYSTEM
• BOOT-UP SYSTEM
• ENGINE SYSTEM
• COOLING SYSTEM
• CONTROL SYSTEM
• HYDRAULIC SYSTEM
• POWER TRAIN SYSTEM
• WORK EQUIPMENT SYSTEM
• STEERING SYSTEM
• BRAKE SYSTEM
• AUTO-GREASING SYSTEM
• UNDERCARRIAGE AND FRAME
• WORK EQUIPMENT
• CAB AND ITS ATTACHMENTS

20 STANDARD VALUE TABLE

• CONTENTS
• ABBREVIATION LIST
• STANDARD VALUE TABLE FOR ENGINE
• STANDARD VALUE TABLE FOR MACHINE

30 TESTING AND ADJUSTING

• CONTENTS
• ABBREVIATION LIST
• RELATED INFORMATION ON TESTING AND ADJUSTING
• ENGINE AND COOLING SYSTEM
• POWER TRAIN
• STEERING SYSTEM
• BRAKE SYSTEM
• HYDRAULIC SYSTEM
• WORK EQUIPMENT
• CAB AND ITS ATTACHMENTS
• ELECTRICAL SYSTEM
• AUTO-GREASING DEVICE
• PM CLINIC

40 TROUBLESHOOTING

• CONTENTS
• ABBREVIATION LIST
• RELATED INFORMATION ON TROUBLESHOOTING
• TROUBLESHOOTING BY FAILURE CODE (DISPLAY OF CODE)
• TROUBLESHOOTING OF ELECTRICAL SYSTEM (E-MODE)
• TROUBLESHOOTING FOR HYDRAULIC AND MECHANICAL SYSTEMS (H MODE)
• TROUBLESHOOTING OF ENGINE (S-MODE)
• TROUBLESHOOTING FOR AUTO-GREASING SYSTEM

50 DISASSEMBLY AND ASSEMBLY

• CONTENTS
• ABBREVIATION LIST
• RELATED INFORMATION ON DISASSEMBLY AND ASSEMBLY
• ENGINE AND COOLING SYSTEM
• POWER TRAIN
• UNDERCARRIAGE AND FRAME
• HYDRAULIC SYSTEM
• WORK EQUIPMENT
• CAB AND ITS ATTACHMENTS
• ELECTRICAL SYSTEM

60 MAINTENANCE STANDARD

• CONTENTS
• ABBREVIATION LIST
• ENGINE AND COOLING SYSTEM
• POWER TRAIN
• STEERING SYSTEM
• BRAKE SYSTEM
• UNDERCARRIAGE AND FRAME
• HYDRAULIC SYSTEM
• WORK EQUIPMENT
• CAB AND ITS ATTACHMENTS

80 APPENDIX

• CONTENTS
• ABBREVIATION LIST
• AIR CONDITIONER SYSTEM
• COMPONENT PARTS OF AIR CONDITIONER SYSTEM
• EXPLANATION OF PROCEDURE FOR TESTING AND TROUBLESHOOTING OF AIR CONDITIONER
• CIRCUIT DIAGRAM AND ARRANGEMENT OF CONNECTOR PINS FOR AIR CONDITIONER
• AIR CONDITIONER SYSTEM DIAGRAM
• INSTALLATION LOCATIONS OF AIR CONDITIONER PARTS AND ARRANGEMENT OF CONNECTORS
• TESTING AIR CONDITIONER USING SELF-DIAGNOSIS FUNCTION
• HOW TO OPEN THE ELECTRICAL SYSTEM ABNORMALITY RECORD SCREEN IN SERVICE MODE OF THE MACHINE MONITOR
• CHECK TEMPERATURE CONTROL FUNCTION
• TEST VENT (MODE) CHANGEOVER
• TESTING FRESH/RECIRC AIR CHANGEOVER
• TEST EVAPORATOR TEMPERATURE SENSOR
• TEST RELAYS
• AIR CONDITIONER TROUBLESHOOTING CHART 1
• AIR CONDITIONER TROUBLESHOOTING CHART 2
• FAILURE CODE [879AKA]
• FAILURE CODE [879AKB]
• FAILURE CODE [879BKA]
• FAILURE CODE [879BKB]
• FAILURE CODE [879CKA]
• FAILURE CODE [879CKB]
• FAILURE CODE [879DKZ]
• FAILURE CODE [879EMC]
• FAILURE CODE [879FMC]
• A-1 TROUBLESHOOTING FOR POWER SUPPLY SYSTEM (AIR CONDITIONER DOES NOT OPERATE)
• A-2 TROUBLESHOOTING FOR COMPRESSOR AND REFRIGERANT SYSTEM (AIR IS NOT COOLED)
• A-3 TROUBLESHOOTING FOR BLOWER MOTOR SYSTEM (NO AIR COMES OUT OR AIR FLOW IS ABNORMAL)
• A-4 TROUBLESHOOTING FOR FRESH/RECIRC AIR CHANGEOVER
• TROUBLESHOOTING USING GAUGE PRESSURE
• CONNECTION OF SERVICE TOOL
• PRECAUTIONS FOR DISCONNECTING AND CONNECTING HOSES AND TUBES IN AIR CONDITIONER PIPINGS
• HANDLE COMPRESSOR OIL

90 CIRCUIT DIAGRAMS

• CONTENTS
• ABBREVIATION LIST
• HYDRAULIC CIRCUIT DIAGRAM
• ELECTRICAL CIRCUIT DIAGRAM

INDEX