Komatsu Wheel Loader WA420-3MC service & repair manual

Description Komatsu Wheel Loader WA420-3MC service & repair manual

Komatsu Wheel Loader WA420-3MC pdf workshop service manual + operation & maintenance manual

Serial numbers A31001 and up

Technical data, specifications, troubleshooting, electrical wiring diagrams, hydraulic schematics, adjusting, assembly, disassembly, removal, installation instructions and other information

MANUAL CONTENT:
GENERAL
SPECIFICATION DRAWINGS
SPECIFICATIONS
WEIGHT TABLE
PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS

STRUCTURE AND FUNCTION
POWER TRAIN
POWER TRAIN SYSTEM
TORQUE CONVERTER, TRANSMISSION PIPING
TRANSMISSION HYDRAULIC SYSTEM DIAGRAM
TRANSMISSION HYDRAULIC CIRCUIT DIAGRAM
TORQUE CONVERTER
TORQUE CONVERTER OIL FILTER
TRANSMISSION
TRANSMISSION CONTROL VALVE
DRIVE SHAFT
FRONT AXLE
REAR AXLE
DIFFERENTIAL
FINAL DRIVE
AXLE MOUNT, CENTER HINGE PIN
STEERING PIPING
STEERING COLUMN
STEERING VALVE
OPERATION OF STEERING VALVE
ORBIT-ROLL VALVE
STOP VALVE
GROUND DRIVEN STEERING PUMP (option)
DIVERTER VALVE (option)
BRAKE PIPING
BRAKE CIRCUIT DIAGRAM
BRAKE VALVE
ACCUMULATOR CHARGE VALVE
ACCUMULATOR (for brake)
SLACK ADJUSTER
BRAKE
PARKING BRAKE CONTROL
PARKING BRAKE
PARKING BRAKE SOLENOID VALVE
PARKING BRAKE VALVE
PARKING BRAKE EMERGENCY RELEASE SOLENOID VALVE
WORK EQUIPMENT HYDRAULIC SYSTEM DIAGRAM
HYDRAULIC PIPING
WORK EQUIPMENT HYDRAULIC CIRCUIT DIAGRAM
WORK EQUIPMENT LEVER LINKAGE
HYDRAULIC TANK
PPC VALVE
PPC RELIEF VALVE
ACCUMULATOR (FOR PPC VALVE)
MAIN CONTROL VALVE
MAIN CONTROL VALVE OPERATION
WORK EQUIPMENT LINKAGE
BUCKET
BUCKET POSITIONER AND BOOM KICK-OUT
ROPS CAB
AIR CONDITIONER
ELECTRIC CIRCUIT DIAGRAM
ELECTRIC CIRCUIT DIAGRAM ECSS
MACHINE MONITOR SYSTEM
MAIN MONITOR
MAINTENANCE MONITOR
TRANSMISSION AUTO-SHIFT CONTROL SYSTEM
ECSS (ELECTRONICALLY CONTROLLED SUSPENSION SYSTEM)
SENSORS
ENGINE STARTING CIRCUIT
ENGINE STOP CIRCUIT
ETHER START CIRCUIT
ELECTRIC TRANSMISSION CONTROL
KICK-DOWN, HOLD SWITCH
KICK-DOWN ELECTRIC CIRCUIT DIAGRAM
TRANSMISSION CUT-OFF FUNCTION
ELECTRIC PARKING BRAKE CONTROL

TESTING, ADJUSTING, AND TROUBLESHOOTING
STANDARD VALUE TABLE FOR CHASSIS
SERVICE TOOLS FOR TESTING, ADJUSTING AND TROUBLESHOOTING
MEASURING ENGINE SPEEDS
MEASURING INTAKE MANIFOLD PRESSURE
MEASURING INTAKE AIR RESTRICTION
MEASURING ENGINE LUBRICATING OIL PRESSURE
MEASURING FUEL INLET RESTRICTION
MEASURING BLOW-BY PRESSURE
MEASURING EXHAUST BACK PRESSURE
MEASURING COOLANT TEMPERATURE
MEASURING AND ADJUSTING VALVE CLEARANCE
MEASURING WASTEGATE ACTUATOR CALIBRATION
MEASURING EXHAUST COLOR
MEASURING ACCELERATOR PEDAL
OPERATING ANGLE OF ACCELERATOR PEDAL
MEASURING OPERATING FORCE, TRAVEL OF SPEED LEVER
MEASURING STALL SPEEDS
MEASURING TORQUE CONVERTER, TRANSMISSION, PARKING BRAKE OIL PRESSURE
METHOD OF OPERATING EMERGENCY MANUAL SPOOL
MEASURING CLEARANCE BETWEEN TIRE AND WHEEL
TESTING AND ADJUSTING STEERING WHEEL
TESTING AND ADJUSTING STEERING CONTROL
MEASURING STEERING OIL PRESSURE
METHOD OF MEASURING MAIN RELIEF PRESSURE
MEASURING OPERATING FORCE, TRAVEL OF BRAKE PEDAL
MEASURING BRAKE PERFORMANCE
TESTING BRAKE OIL PRESSURE
MEASURING BRAKE DISC WEAR
BLEEDING AIR FROM BRAKE SYSTEM
MEASURING PARKING BRAKE PERFORMANCE
MANUAL RELEASE OF PARKING BRAKE
MEASURING PARKING BRAKE DISC WEAR
MEASURING WORK EQUIPMENT CONTROL LEVER
MEASURING WORK EQUIPMENT HYDRAULIC PRESSURE
MEASURING WORK EQUIPMENT
MEASURING HYDRAULIC DRIFT WORK EQUIPMENT
TESTING AND ADJUSTING BUCKET POSITIONER
TESTING AND ADJUSTING BOOM KICKOUT
ADJUSTING MAIN MONITOR (SPEEDOMETER MODULE)
CHECKING FOR ABNORMALITY IN FUEL LEVEL SENSOR
TROUBLESHOOTING
POINTS TO REMEMBER WHEN TROUBLESHOOTING
SEQUENCE OF EVENTS IN TROUBLESHOOTING
PRECAUTIONS WHEN CARRYING OUT MAINTENANCE
POINTS TO REMEMBER WHEN HANDLING HYDRAULIC EQUIPMENT
HANDLING CONNECTORS
CHECKS BEFORE TROUBLESHOOTING
METHOD OF USING TROUBLESHOOTING CHARTS
CONNECTOR TYPES AND MOUNTING LOCATIONS
CONNECTOR AND PIN IDENTIFICATION
TROUBLESHOOTING OF ENGINE SYSTEM (S-MODE)
TROUBLESHOOTING OF MAIN MONITOR SYSTEM (M-MODE)
TROUBLESHOOTING OF MAINTENANCE MONITOR SYSTEM (K-MODE)
TROUBLESHOOTING OF ELECTRICAL SYSTEM (E-MODE)
TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (CHASSIS RELATED) (T-MODE)
TROUBLESHOOTING OF ECSS (ELECTRONICALLY CONTROLLED SUSPENSION SYSTEM) (D-MODE)
TROUBLESHOOTING OF TRANSMISSION CONTROLLER SYSTEM (A-MODE)

DISASSEMBLY AND ASSEMBLY
METHOD OF USING MANUAL
SPECIAL TOOL LIST
STARTING MOTOR
ALTERNATOR
ENGINE
RADIATOR
ENGINE
TORQUE CONVERTER CHARGING PUMP
TORQUE CONVERTER & TRANSMISSION
TORQUE CONVERTER
TRANSMISSION
TRANSMISSION CLUTCH PACK
PARKING BRAKE
TRANSMISSION CONTROL VALVE
TRANSMISSION ACCUMULATOR VALVE
DRIVE SHAFT
FRONT AXLE
REAR AXLE
FRONT DIFFERENTIAL
REAR DIFFERENTIAL
DIFFERENTIAL
FINAL DRIVE
CENTER HINGE PIN
STEERING VALVE (ORBIT ROLL)
STEERING VALVE
STEERING DEMAND VALVE
STEERING, SWITCH PUMP
STEERING CYLINDER
BRAKE VALVE
RIGHT BRAKE VALVE (TANDEM)
LEFT BRAKE VALVE (SINGLE)
SLACK ADJUSTER
BRAKE
PARKING BRAKE DISC
HYDRAULIC TANK
WORK EQUIPMENT, PPC PUMP
PPC VALVE
MAIN CONTROL VALVE
BUCKET CYLINDER
BOOM CYLINDER
HYDRAULIC CYLINDER
WORK EQUIPMENT
COUNTERWEIGHT
FUEL TANK
CAB
MAIN MONITOR
MAINTENANCE MONITOR
AIR CONDITIONER UNIT
AIR CONDITIONER CONDENSER
DRY RECEIVER
AIR CONDITIONER COMPRESSOR

MAINTENANCE STANDARD
ENGINE MOUNT, TRANSMISSION MOUNT
TORQUE CONVERTER
TRANSMISSION
TRANSMISSION CONTROL VALVE
DRIVE SHAFTS
DIFFERENTIAL
LIMITED SLIP DIFFERENTIAL (OPTIONAL)
FINAL DRIVE
AXLE MOUNT
STEERING COLUMN
STEERING VALVE
STEERING CYLINDER MOUNT
GROUND DRIVEN STEERING PUMP (optional)
SLACK ADJUSTER
BRAKE VALVE
BRAKE
PARKING BRAKE
TORQUE CONVERTER, TRANSMISSION PUMP
HYDRAULIC PUMP (STEERING, SWITCH PUMP)
HYDRAULIC, PPC PUMP
PPC VALVE
CUT-OFF VALVE
MAIN CONTROL VALVE
HYDRAULIC CYLINDER
CENTER HINGE PIN
WORK EQUIPMENT LINKAGE
BUCKET
BUCKET POSITIONER AND BOOM KICK-OUT

OTHER
ELECTRICAL CIRCUIT DIAGRAM

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