Komatsu Wheel Loader WA470-6 WA480-6 (SERIAL NUMBER A46001 and up) Shop Manual

CEBM023002 – WA470-6, WA480-6
CONTENTS
REVISED PAGES

SAFETY
GENERAL
HOW TO READ THE SHOP MANUAL
HOISTING INSTRUCTIONS
MAINTENANCE STANDARD TERMINOLOGY
HANDLING ELECTRIC EQUIPMENT AND HYDRAULIC COMPONENTS
PRECAUTIONS FOR OPERATIONS
PUSH PULL COUPLER
COATING MATERIALS
STANDARD TIGHTENING TORQUE
ELECTRIC WIRE CODE
CONVERSION TABLES
LIST OF ABBREVIATIONS
01 GENERAL

SPECIFICATIONS
WEIGHT TABLE
TABLE OF FUEL, COOLANT AND LUBRICANTS
10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD

ENGINE AND COOLING SYSTEM
POWER TRAIN
MAIN AND TORQUE CONVERTER RELIEF VALVES
AXLE
DIFFERENTIAL
LIMITED SLIP DIFFERENTIAL
FINAL DRIVE
STEERING SYSTEM
BRAKE SYSTEM
UNDERCARRIAGE AND FRAME
HYDRAULIC SYSTEM
WORK EQUIPMENT
CAB AND ITS ATTACHMENTS
ELECTRICAL SYSTEM
20 STANDARD VALUE TABLES
STANDARD SERVICE VALUE TABLE
30 TESTING AND ADJUSTING
TOOLS
ENGINE COMPONENTS
FUEL SYSTEM
EXHAUST SYSTEM AND PIPING
BELTS
TRANSMISSION SPEED SENSOR
DIRECTIONAL LEVER
FNR AND GEAR SHIFT LEVERS
POWER TRAIN OIL PRESSURE
FLUSHING TRANSMISSION SYSTEM
TRANSMISSION VALVE FAILS
AXLE DRIVE AND DRIVE SHAFTS
STEERING SYSTEM
HYDRAULIC FAN
BRAKE SYSTEM
WORK EQUIPMENT
ACCUMULATOR
BUCKET POSITIONER
BOOM KICK-OUT
PROXIMITY SWITCH OPERATION PILOT LAMP
ELECTRICAL SYSTEM
KOMTRAX SYSTEM
MACHINE MONITOR SYSTEM
PM-CLINIC INSPECTION TABLE
40 TROUBLESHOOTING
FAILURE CODE TABLE
POINTS TO REMEMBER WHEN TROUBLESHOOTING
SEQUENCE OF EVENTS IN TROUBLESHOOTING
CLASSIFICATION AND TROUBLESHOOTING PROCEDURES
MODE CHART
CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
T-BRANCH BOX and T-BRANCH ADAPTER TABLE
FAILURE CODES

COMMUNICATION FAILURE WITH TC300/TC301 KOMTRAX
50 DISASSEMBLY AND ASSEMBLY

HOW TO READ THIS MANUAL
SPECIAL TOOLS LIST
CONNECTOR REPAIR PROCEDURES
ENGINE AND COOLING SYSTEM
POWER TRAIN
BRAKE SYSTEM
UNDERCARRIAGE AND FRAME
HYDRAULIC SYSTEM
WORK EQUIPMENT
CAB AND ITS ATTACHMENTS
60 AIR CONDITIONER
PRECAUTIONS FOR REFRIGERANT
TROUBLESHOOTING PROCEDURE
CIRCUIT DIAGRAM AND CONNECTOR PINS
SYSTEM DIAGRAM
DETAIL OF AIR CONDITIONER UNIT
TROUBLESHOOTING CHART 1
TROUBLESHOOTING CHART 2
INFORMATION IN TROUBLESHOOTING TABLE
TROUBLESHOOTING FOR POWER
TROUBLESHOOTING COMPRESSOR AND REFRIGERANT SYSTEM
TROUBLESHOOTING FOR BLOWER MOTOR
TROUBLESHOOTING TEMPERATURE CONTROL
TROUBLESHOOTING VENT (MODE) CHANGEOVER
TROUBLESHOOTING FRESH/RECIRC AIR CHANGEOVER
TROUBLESHOOTING WITH GAUGE PRESSURE
CONNECTION OF SERVICE TOOL.
HANDLING OF COMPRESSOR OIL
90 DIAGRAMS AND SCHEMATICS

POWER TRAIN HYDRAULIC CIRCUIT DIAGRAM
AUTOMATIC GREASING CIRCUIT DIAGRAM
Hydraulic Circuit Diagram
Electrical Circuit Diagram (1/10)
Electrical Circuit Diagram (2/10)
Electrical Circuit Diagram (3/10)
Electrical Circuit Diagram (4/10)
Electrical Circuit Diagram (5/10)
Electrical Circuit Diagram (6/10)
Electrical Circuit Diagram (7/10)
Electrical Circuit Diagram (8/10)
Electrical Circuit Diagram (9/10)
Electrical Circuit Diagram (10/10)
Work Equipment Controller System Electrical Circuit Diagram
Connector List and Stereogram