Komatsu Wheel Loader WA250-5 WA250L-5 WA250PT-5 WA250PTL-5 service & repair manual

Description Komatsu Wheel Loader WA250-5 WA250L-5 WA250PT-5 WA250PTL-5 service & repair manual

Komatsu Wheel Loader WA250-5, WA250L-5, WA250PT-5, WA250PTL-5 pdf workshop service manual + operation & maintenance manual

Serial numbers 70001 and up

Specifications, testing, adjusting, troubleshooting, technical data, electrical wiring diagrams, hydraulic schematics, assembly, disassembly, removal, installation instructions and other information

MANUAL CONTENT:
GENERAL
General assembly drawings
Specifications
Weight table
List of lubricant and coolant

STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
Engine mount and transfer mount
Damper
Cooling system
Transfer oil cooler
Power train
Power train system diagram
Drive shaft (propeller shaft)
HST hydraulic piping diagram
HST pump
High-pressure relief valve
Low-pressure relief valve
HST charge pump
Speed-related valve (DA valve)
High-pressure cut-off valve
HST motor
EP servo valve
HA servo valve
Forward-reverse shuttle valve
Transfer
Clutch solenoid valve
Axle
Differential
Limited-slip differential
Final drive
Axle mounting and center hinge pin
Steering piping
Steering column
Priority valve
Orbit-roll valve
2-way restrictor valve
Cushion valve
Steering cylinder
Emergency steering piping
Emergency steering valve
Brake piping
Brake valve
Inching valve
Charge valve
Accumulator (for brake)
Slack adjuster
Brake
Parking brake control
Parking brake
Hydraulic piping
Hydraulic tank
4-gear pump unit
Accumulator (for PPC circuit)
Lock valve
Bypass valve
Quick coupler valve
E.C.S.S. valve
Accumulator (for E.C.S.S.)
Hydraulic piping of cooling system
Cooling
Work equipment control valve
Work equipment PPC valve
Attachment PPC valve (if equipped)
Work equipment linkage
Bucket
Control of bucket positioner, boom kick-out,
and dump speed
Work equipment cylinder
Air conditioner (if equipped)
Machine monitoring system
Machine monitor
List of items displayed on monitor
Electrical system (HST controller system)
HST controller
Engine start circuit
Engine stop circuit
Preheating circuit
Parking brake circuit
Electronically controlled suspension system
Sensors

TESTING AND ADJUSTING
TOOLS FOR TESTING, ADJUSTING, AND TROUBLESHOOTING
MEASURING ENGINE SPEED
MEASURING EXHAUST GAS COLOR
ADJUSTING VALVE CLEARANCE
MEASURING COMPRESSION PRESSURE
MEASURING BLOW-BY PRESSURE
TESTING AND ADJUSTING FUEL INJECTION TIMING
MEASURING ENGINE OIL PRESSURE
MEASURING,TESTING OPERATING FORCE OF ACCELERATOR PEDAL
ADJUSTING ENGINE STOP SOLENOID
ADJUSTING ENGINE SPEED SENSOR
TESTING AND ADJUSTING AIR CONDITIONER COMPRESSOR BELT TENSION
MEASURING DIRECTIONAL LEVER
TESTING AND ADJUSTING HST OIL PRESSURE
MEASURING CLUTCH CONTROL PRESSURE
TESTING AND ADJUSTING STEERING WHEEL
TESTING AND ADJUSTING STEERING OIL PRESSURE
BLEEDING AIR FROM STEERING CIRCUIT
TESTING HYDRAULIC FAN
MEASURING BRAKE PEDAL
TESTING AND ADJUSTING BRAKE PEDAL LINKAGE
MEASURING BRAKE PERFORMANCE
TESTING AND ADJUSTING ACCUMULATOR CHARGE PRESSURE
MEASURING BRAKE OIL PRESSURE
MEASURING WEAR OF BRAKE DISC
BLEEDING AIR FROM BRAKE CIRCUIT
MEASURING PARKING BRAKE PERFORMANCE
TESTING AND ADJUSTING PARKING BRAKE LINKAGE
MEASURING AND ADJUSTING WORK EQUIPMENT CONTROL
TESTING AND ADJUSTING WORK EQUIPMENT HYDRAULIC PRESSURE
TESTING AND ADJUSTING WORK EQUIPMENT PPC OIL PRESSURE
BLEEDING AIR
RELEASING REMAINING PRESSURE IN HYDRAULIC CIRCUIT
TESTING AND ADJUSTING BUCKET POSITIONER
TESTING AND ADJUSTING OF BOOM KICK-OUT
CHECKING PROXIMITY SWITCH ACTUATION DISPLAY LAMP
PROCEDURE FOR CHECKING DIODE
SPECIAL FUNCTIONS OF MACHINE MONITOR
FLOW OF MODES AND FUNCTIONS
FAILURE CODE TABLE
PM CLINIC INSPECTION CHART

TROUBLESHOOTING
POINTS TO REMEMBER WHEN TROUBLESHOOTING
SEQUENCE OF EVENTS IN TROUBLESHOOTING
PRECAUTIONS WHEN CARRYING OUT MAINTENANCE
CHECK BEFORE TROUBLESHOOTING
CATEGORIES,PROCEDURE,AND METHOD OF USING TROUBLESHOOTING CHARTS
PHENOMENA CONSIDERED TO BE FAILURES AND TROUBLESHOOTING NO.
CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
T-ADAPTER TABLE
CONNECTOR TYPES AND MOUNTING LOCATIONS
CONNECTOR LAYOUT DRAWING
TROUBLESHOOTING OF HST CONTROLLER SYSTEM (HST MODE)
TROUBLESHOOTING OF ECSS (ECSS MODE) (IF EQUIPPED)
TROUBLESHOOTING OF MONITOR SYSTEM (MON MODE)
TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE)
TROUBLESHOOTING OF HYDRAULIC,MECHANICAL SYSTEM (H MODE)
TROUBLESHOOTING OF ENGINE (S MODE)

DISASSEMBLY AND ASSEMBLY
HOW TO READ THIS MANUAL
PRECAUTIONS WHEN PERFORMING OPERATION
SPECIAL TOOL LIST
SKETCHES OF SPECIAL TOOLS
REMOVAL, INSTALLATION OF FUEL INJECTION PUMP ASSEMBLY
REMOVAL, INSTALLATION OF NOZZLE HOLDER ASSEMBLY
REMOVAL, INSTALLATION OF CYLINDER HEAD ASSEMBLY
REMOVAL, INSTALLATION OF ENGINE ASSEMBLY
REMOVAL, INSTALLATION OF RADIATOR ASSEMBLY
REMOVAL, INSTALLATION OF AIR AFTERCOOLER
REMOVAL, INSTALLATION OF HYDRAULIC OIL COOLER ASSEMBLY
REMOVAL, INSTALLATION OF COOLING FAN AND FAN MOTOR ASSEMBLY
REMOVAL, INSTALLATION OF FUEL TANK ASSEMBLY
REMOVAL, INSTALLATION OF TRANSFER
DISASSEMBLY, ASSEMBLY OF TRANSFER ASSEMBLY
REMOVAL, INSTALLATION OF PARKING BRAKE ASSEMBLY
DISASSEMBLY, ASSEMBLY OF PARKING BRAKE ASSEMBLY
REMOVAL, INSTALLATION OF FRONT AXLE ASSEMBLY
REMOVAL, INSTALLATION OF REAR AXLE ASSEMBLY
DISASSEMBLY, ASSEMBLY OF AXLE HOUSING ASSEMBLY
DISASSEMBLY, ASSEMBLY OF DIFFERENTIAL ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF HST PUMP ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF HST MOTOR ASSEMBLY
REMOVAL, INSTALLATION OF WORK EQUIPMENT CONTROL VALVE ASSEMBLY
REMOVAL, INSTALLATION OF TRAVEL DAMPER VALVE ASSEMBLY (IF EQUIPPED)
REMOVAL, INSTALLATION OF HYDRAULIC TANK ASSEMBLY
REMOVAL, INSTALLATION OF WORK EQUIPMENT ASSEMBLY
DISASSEMBLY, ASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLY
REMOVAL, INSTALLATION OF OPERATOR'S CAB ASSEMBLY
REMOVAL, INSTALLATION OF OPERATOR'S CAB GLASS (STUCK GLASS)
REMOVAL, NSTALLATION OF CENTER HINGE PIN
REMOVAL, INSTALLATION OF COUNTERWEIGHT
REMOVAL, INSTALLATION OF AIR CONDITIONER UNIT ASSEMBLY
REMOVAL, INSTALLATION OF CONDITIONER COMPRESSOR ASSEMBLY
REMOVAL, INSTALLATION OF MONITOR PANEL
REMOVAL, INSTALLATION OF HST CONTROLLER ASSEMBLY

OTHERS
Hydraulic circuit diagram
Electrical circuit diagram

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