Komatsu Wheel Loader WA400-5 (SERIAL NUMBERS 70001 and up) Shop Manual

COVER
CONTENTS
LIST OF REVISED PAGES
SAFETY
SAFETY NOTICE
FOREWORD
GENERAL
HOW TO READ THE SHOP MANUAL
HOISTING INSTRUCTIONS
METHOD OF DISASSEMBLING, CONNECTING PUSH-PULL TYPE COUPLER
COATING MATERIALS
STANDARD TIGHTENING TORQUE
ELECTRIC WIRE CODE
CONVERSION TABLE
UNITS
01 GENERAL
GENERAL ASSEMBLY DRAWING
SPECIFICATIONS
WEIGHT TABLE
LIST OF LUBRICANT AND COOLANT
10 STRUCTURE AND FUNCTION, MAINTENANCE STANDARD
COOLING SYSTEM
ENGINE MOUNT, TRANSMISSION MOUNT
POWER TRAIN
POWER TRAIN SYSTEM DIAGRAM
DRIVE SHAFT (PROPELLER SHAFT)
TORQUE CONVERTER, TRANSMISSION PIPING
TORQUE CONVERTER
TRANSMISSION
TRANSMISSION CONTROL VALVE
AXLE
DIFFERENTIAL
FINAL DRIVE
AXLE MOUNTING, CENTER HINGE PIN
STEERING PIPING
STEERING COLUMN, ORBIT-ROLL
STEERING VALVE
ORBIT-ROLL VALVE
STOP VALVE
STEERING PUMP, SWITCH PUMP
EMERGENCY STEERING PUMP (OP)
EMERGENCY STEERING MOTOR (OP)
STEERING CYLINDER
JOYSTICK STEERING LEVER (OP)
STEERING LEVER (OP)
STEERING SWITCH VALVE (OP)
BRAKE PIPING
BRAKE VALVE
CHARGE VALVE
ACCUMULATOR (FOR BRAKE)
BRAKE
PARKING BRAKE CONTROL
PARKING BRAKE
PARKING BRAKE SOLENOID VALVE
PARKING BRAKE EMERGENCY RELEASE VALVE
HYDRAULIC PIPING
WORK EQUIPMENT CONTROL LEVER
HYDRAULIC TANK
TORQUE CONVERTER CHARGING, WORK EQUIPMENT, AND PILOT CONTROL PUMPS
PPC RELIEF VALVE
ECSS VALVE
WORK EQUIPMENT CONTROL VALVE
WORK EQUIPMENT PPC VALVE
PPC VALVE (FOR MULTI FUNCTION MONO LEVER)
EPC SOLENOID VALVE (OP)
SHUT OFF VALVE (OP)
ATTACHMENT PPC VALVE (OP)
COOLING FAN MOTOR
COOLING FAN MOTOR DRIVE PUMP
WORK EQUIPMENT LINKAGE
BUCKET
BUCKET POSITIONER, LIFT ARM KICK-OUT
WORK EQUIPMENT CYLINDER
CAB
AIR CONDITIONER (OP)
MACHINE MONITORING SYSTEM
MACHINE MONITOR
TRANSMISSION CONTROL SYSTEM
TRANSMISSION CONTROLLER
JOY STICK STEERING CONTROL SYSTEM (OP)
WORK EQUIPMENT CONTROLLER
ELECTRIC TRANSMISSION CONTROL
KICK DOWN, HOLD SWITCH
ENGINE STARTING CIRCUIT
ENGINE STOP CIRCUIT
PREHEATING CIRCUIT
ENGINE POWER MODE SELECTOR CIRCUIT
PARKING BRAKE CIRCUIT
SENSORS
20 TESTING AND ADJUSTING
STANDARD VALUE TABLE
TESTING AND ADJUSTING
TROUBLESHOOTING
30 DISASSEMBLY AND ASSEMBLY
METHOD OF USING MANUAL
PRECAUTIONS WHEN CARRYING OUT OPERATION
SPECIAL TOOL LIST
REMOVAL AND INSTALLATION OF ENGINE ASSEMBLY
REMOVAL AND INSTALLATION OF CYLINDER HEAD ASSEMBLY
REMOVAL AND INSTALLATION OF RADIATOR AND FAN MOTOR ASSEMBLY
REMOVAL AND INSTALLATION OF AFTERCOOLER ASSEMBLY
REMOVAL AND INSTALLATION OF FUEL INJECTION PUMP
REMOVAL AND INSTALLATION OF NOZZLE HOLDER ASSEMBLY
REMOVAL AND INSTALLATION OF FAN AND FAN MOTOR ASSEMBLY
REMOVAL AND INSTALLATION OF FUEL TANK ASSEMBLY
REMOVAL AND INSTALLATION OF PARKING BRAKE DISC PLATE
REMOVAL AND INSTALLATION OF TORQUE CONVERTER AND TRANSMISSION ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF TRANSMISSION ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF TRANSMISSION CLUTCH PACK ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF PARKING BRAKE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF TORQUE CONVERTER ASSEMBLY (STANDARD SPECIFICATION)
DISASSEMBLY AND ASSEMBLY OF TORQUE CONVERTER ASSEMBLY (LOCK-UP SPECIFICATION)
REMOVAL AND INSTALLATION OF REAR AXLE ASSEMBLY
REMOVAL AND INSTALLATION OF FRONT AXLE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF AXLE HOUSING ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF DIFFERENTIAL ASSEMBLY
REMOVAL AND INSTALLATION OF CENTER HINGE PIN
REMOVAL AND INSTALLATION OF CAB ASSEMBLY
REMOVAL AND INSTALLATION OF CAB AND FLOOR FRAME ASSEMBLY
REMOVAL AND INSTALLATION OF OPERATOR’S CAB GLASS (STUCK GLASS)
REMOVAL AND INSTALLATION OF TRANSMISSION, WORK EQUIPMENT, AND PPC PUMP ASSEMBLY
REMOVAL AND INSTALLATION OF STEERING, SWITCHING, AND FAN PUMP ASSEMBLY
REMOVAL AND INSTALLATION OF STEERING DEMAND VALVE ASSEMBLY
REMOVAL AND INSTALLATION OF TRAVEL DUMPER VALVE ASSEMBLY
REMOVAL AND INSTALLATION OF WORK EQUIPMENT VALVE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLY (STEERING, LIFT, AND BUCKET CYLINDER ASSEMBLY)
REMOVAL AND INSTALLATION OF HYDRAULIC TANK ASSEMBLY
REMOVAL AND INSTALLATION OF WORK EQUIPMENT ASSEMBLY
REMOVAL AND INSTALLATION OF COUNTER WEIGHT
REMOVAL AND INSTALLATION OF AIR CONDITIONER UNIT ASSEMBLY
REMOVAL AND INSTALLATION OF AIR CONDITIONER COMPRESSOR ASSEMBLY
DISASSEMBLY, ASSEMBLY OF OPERATOR’S SEAT ASSEMBLY
90 OTHERS
POWER TRAIN OIL CIRCUIT DIAGRAM (WITHOUT TORQUE CONVERTER LOCKUP CLUTCH)
POWER TRAIN OIL CIRCUIT DIAGRAM (WITH TORQUE CONVERTER LOCKUP CLUTCH)
BRAKE OIL CIRCUIT DIAGRAM
WORK EQUIPMENT HYDRAULIC CIRCUIT DIAGRAM
ELECTRICAL CIRCUIT DIAGRAM 1/8 (1/4)
ELECTRICAL CIRCUIT DIAGRAM 1/8 (2/4)
ELECTRICAL CIRCUIT DIAGRAM 1/8 (3/4)
ELECTRICAL CIRCUIT DIAGRAM 1/8 (4/4)
ELECTRICAL CIRCUIT DIAGRAM 2/8 (1/4)
ELECTRICAL CIRCUIT DIAGRAM 2/8 (2/4)
ELECTRICAL CIRCUIT DIAGRAM 2/8 (3/4)
ELECTRICAL CIRCUIT DIAGRAM 2/8 (4/4)
ELECTRICAL CIRCUIT DIAGRAM 3/8
ELECTRICAL CIRCUIT DIAGRAM 4/8
ELECTRICAL CIRCUIT DIAGRAM 5/8
ELECTRICAL CIRCUIT DIAGRAM 6/8
ELECTRICAL CIRCUIT DIAGRAM 7/8
ELECTRICAL CIRCUIT DIAGRAM 8/8