Komatsu Wheel Loader WA120-3 WA120L-3 service & repair manual

Description Komatsu Wheel Loader WA120-3 WA120L-3 service & repair manual

Komatsu Wheel Loader WA120-3, WA120L-3 pdf workshop service repair manual + operation & maintenance manual

Serial numbers:
WA120-3L A30001 and up
WA120L-3 54001 - 54103

MANUAL CONTENT:
GENERAL
SPECIFICATION DRAWINGS
SPECIFICATIONS
WEIGHT TABLE
FUEL, COOLANT, AND LUBRICANTS
ENGINE OIL SPECIFICATIONS
DIESEL FUEL SPECIFICATIONS
COOLANT SPECIFICATIONS

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
CLUTCH
REVERSE CLUTCH
FORWARD, 2ND CLUTCH
3RD, 4TH CLUTCH
Operation of clutch
FORWARD 1ST
FORWARD 2ND
FORWARD 3RD
FORWARD 4TH
REVERSE 1ST
TRANSMISSION CONTROL VALVE
UPPER VALVE
LOWER VALVE
TRANSMISSION SOLENOID VALVE
TORQUE CONVERTER OUTLET PORT VALVE
PILOT REDUCING VALVE
TRANSMISSION SOLENOID VALVE
PRIORITY VALVE
MAIN REGULATOR VALVE
QUICK RETURN VALVE
MODULATION FILL VALVE
DIRECTIONAL SELECTOR SPOOL
EMERGENCY MANUAL SPOOL
OPERATION OF FORWARD 1ST
ACCUMULATOR VALVE
TRANSMISSION CONTROL
DRIVE SHAFT
AXLE
FRONT AXLE
FRONT DIFFERENTIAL
REAR AXLE
REAR DIFFERENTIAL
TORQUE PROPORTIONING DIFFERENTIAL
FINAL DRIVE
AXLE MOUNT
CENTER HINGE PIN
STEERING PIPING
STEERING COLUMN
PRIORITY VALVE
STEERING VALVE (ORBIT-ROLL)
Operation
1. Steering wheel at neutral
2. Steering wheel turned (turning to left)
CONNECTION BETWEEN HAND PUMP AND SLEEVE
BRAKE PIPING
BRAKE CONTROL
BRAKE BOOSTER
BRAKE
PARKING BRAKE CONTROL
PARKING BRAKE
HYDRAULIC PIPING
WORK EQUIPMENT HYDRAULIC SYSTEM DIAGRAM
WORK EQUIPMENT HYDRAULIC CIRCUIT DIAGRAM
HYDRAULIC TANK
OIL FILTER BYPASS VALVE
BREATHER
MAIN CONTROL VALVE
2-SPOOL VALVE
3-SPOOL VALVE
RELIEF VALVE
SAFETY VALVE (WITH SUCTION)
SUCTION VALVE
Boom and bucket spool at NEUTRAL position
Boom spool at RAISE position
Boom spool at LOWER position
Boom spool at FLOAT position
Bucket spool at TILT BACK position
Bucket spool at DUMP position
WORK EQUIPMENT LEVER LINKAGE
WORK EQUIPMENT LINKAGE
BUCKET
BUCKET POSITIONER AND BOOM KICK-OUT
BUCKET POSITIONER
BOOM KICK-OUT
PROXIMITY SWITCH
OPERATION OF THE PROXIMITY SWITCH
Bucket TILT BACK switch
Boom RAISE switch
Action of the proximity switch
ROPS CAB
AIR CONDITIONER
AIR CONDITIONER AND HEATER PIPING
ELECTRIC CIRCUIT DIAGRAM
E.C.S.S. (ELECTRONIC CONTROLLED SUSPENSION SYSTEM)
E.C.S.S. HYDRAULIC, ELECTRICAL CIRCUIT DIAGRAM
OPERATION
ELECTRICAL WIRING ILLUSTRATION
CENTRAL PANEL (CLUSTER GAUGE)
SENSOR
ENGINE OIL PRESSURE
BRAKE OIL LEVEL
ENGINE STARTING CIRCUIT
ENGINE STOP CIRCUIT
AUTOMATIC PREHEATING CIRCUIT
QUICK HEATING SYSTEM (Q.H.S.)
Q.H.S. CONTROLLER
HEATER RELAY
RIBBON HEATER
Q.H.S. WATER TEMPERATURE SENSOR
ELECTRICAL TRANSMISSION CONTROL
COMBINATION SWITCH
TRANSMISSION CUT-OFF FUNCTION
PARKING BRAKE FUNCTION
KICK-DOWN SWITCH
KICK DOWN ELECTRIC CIRCUIT DIAGRAM
KICK-DOWN SWITCH OPERATED

TESTING, ADJUSTING AND TROUBLESHOOTING
TESTING AND ADJUSTING
STANDARD VALUE TABLE FOR ENGINE - In Chassis
STANDARD VALUE TABLE FOR CHASSIS
TOOLS FOR TESTING, ADJUSTING & TROUBLESHOOTING
MEASURING ENGINE SPEEDS
MEASURING ENGINE LUBRICATING OIL PRESSURE
MEASURING FUEL FILTER INLET RESTRICTION
MEASURING BLOW-BY PRESSURE
MEASURING COMPRESSION PRESSURE
MEASURING EXHAUST COLOR
MEASURING COOLANT TEMPERATURE
MEASURING AND ADJUSTING VALVE CLEARANCE
MEASURING ACCELERATOR PEDAL
OPERATING FORCE OF ACCELERATOR PEDAL
OPERATING ANGLE OF ACCELERATOR PEDAL
MEASURING OPERATING FORCE, AND TRAVEL OF SPEED LEVER
OPERATING FORCE OF SPEED LEVER
TRAVEL OF SPEED LEVER
MEASURING STALL SPEEDS
TORQUE CONVERTER STALL SPEED
HYDRAULIC STALL SPEED
FULL STALL SPEED
MEASURING TORQUE CONVERTER, TRANSMISSION OIL PRESSURE
METHOD OF OPERATING EMERGENCY MANUAL SPOOL
TESTING AND ADJUSTING STEERING WHEEL
MEASURING PROCEDURE
MEASURING OPERATING FORCE OF STEERING WHEEL
MEASURING OPERATING TIME FOR STEERING WHEEL
MEASURING STEERING OIL PRESSURE
METHOD OF MEASURING MAIN RELIEF PRESSURE
METHOD OF ADJUSTING MAIN RELIEF PRESSURE
MEASURING OPERATING FORCE, TRAVEL OF BRAKE PEDAL
TESTING AND ADJUSTING BRAKE PEDAL LINKAGE
MEASURING BRAKE PERFORMANCE
MEASURING BRAKE OIL PRESSURE
TESTING FOR BRAKE DISC WEAR
BLEEDING AIR FROM BRAKE SYSTEM
MEASURING PARKING BRAKE PERFORMANCE
TESTING AND ADJUSTING PARKING BRAKE LINKAGE
TESTING PARKING BRAKE DISC WEAR
MEASURING PARKING BRAKE DISC WEAR
MEASURING WORK EQUIPMENT CONTROL LEVER

DISASSEMBLY AND ASSEMBLY
When removing or installing unit assemblies
General precautions
Listing of special tools
PRECAUTIONS WHEN CARRYING OUT OPERATION
Precautions when carrying out removal work
Precautions when carrying out installation work
Precautions when completing the operations
SPECIAL TOOL LIST
STARTING MOTOR ASSEMBLY
ALTERNATOR ASSEMBLY
FUEL INJECTION PUMP
ENGINE OIL COOLER
WATER PUMP
NOZZLE HOLDER
THERMOSTAT
TURBOCHARGER
CYLINDER HEAD
RADIATOR
ENGINE
ENGINE HOOD
EXHAUST MUFFLER
AIR CLEANER
TORQUE CONVERTER CHARGING PUMP
TORQUE CONVERTER, TRANSMISSION
TORQUE CONVERTER ASSEMBLY
TRANSMISSION
PARKING BRAKE

MAINTENANCE STANDARD
ENGINE MOUNT, TRANSMISSION MOUNT
TORQUE CONVERTER CHARGING PUMP
TORQUE CONVERTER
TRANSMISSION
REVERSE, 1ST CLUTCH
FORWARD , 2ND CLUTCH
3RD, 4TH CLUTCH
TRANSMISSION CONTROL VALVE
LOWER VALVE
SOLENOID VALVE
ACCUMULATOR VALVE
DRIVE SHAFT
DIFFERENTIAL
FINAL DRIVE
AXLE MOUNT
CENTER HINGE PIN
STEERING COLUMN
STEERING CYLINDER MOUNT
PRIORITY VALVE
BRAKE BOOSTER
BRAKE
PARKING BRAKE
HYDRAULIC PUMP
MAIN CONTROL VALVE
2-SPOOL VALVE
3-SPOOL VALVE
HYDRAULIC CYLINDER
WORK EQUIPMENT LINKAGE
BUCKET
BUCKET POSITIONER AND BOOM KICK-OUT

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