








$25.00
Generation
5HLanguage
EnglishModel of Truck
WA320-5HRegion
EuropeTruck Class
WA320Illustrated factory Workshop Manual for Komatsu 4WD Wheeled Loaders Models WA320-5H.
This manual will assist you in diagnosing, repairing, and adjusting for your 4wd wheeled loader.
You can use a Windows, Mac, or Android device to view this manual. You only need to have a PDF reader installed.
Covered Models (Europe):
WA320-5H (SN: H50051-)
Format: PDF, 972 pages
Language: English
Table of Contents:
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
GENERAL
GENERAL ASSEMBLY DRAWINGS
SPECIFICATIONS
WEIGHT TABLE
PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS
STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
Engine mount and transfer mount
Damper
Cooling system
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
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
Work equipment lever linkage
Hydraulic tank
gear pump unit
Accumulator (for PPC circuit)
Lock valve
E. C. S. S. valve
Accumulator (forE.C.S.S.)
Hydraulic piping of cooling system
Cooling fan motor
Work equipment control valve
Work equipment PPC valve
Attachment PPC valve
Work equipment linkage
Bucket
Bucket positioner and boom kick-out
Work equipment cylinder
Air conditioner
Machine monitoring system
Machine monitor
List of items displayed on monitor
Electrical system (HST controller system)
HST controller
Function of selecting directional selector switch
Engine start circuit
Engine stop circuit
Preheating circuit (automatic preheating system)
Parking brake circuit
Electronically controlled suspension system
Sensors
STANDARD VALUE TABLE FOR engine
STANDARD VALUE TABLE FOR CHASSIS
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 oil pressure
Bleeding air from brake circuit
Measuring parking brake performance
Measuring and adjusting work equipment control lever
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
Special functions of machine monitor
Pm CLINIC INSPECTION CHART
TESTING AND ADJUSTING
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 locat
ions
Connector layout drawing
TROUBLESHOOTING
Before troubleshooting code display
Before troubleshooting electrical system
Information contained in troubuleshooting table
TROUBLESHOOTING OF HST CONTROLLER SYSTEM (HST MODE)
Before troubleshooting code display
Before troubleshooting electrical system
Information contained in troubuleshooting table
TROUBLESHOOTING OF monitor SYSTEM (mon MODE)
Before troubleshooting electrical system
Information contained in troubuleshooting table
TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE)
Method of using troubleshooting chart
Failure code and cause table
TROUBLESHOOTING OF HYDRAULIC, MECHANICAL SYSTEM (H MODE)
Method of using troubleshooting charts
TROUBLESHOOTING OF ENGINE (S MODE)
How to read this manual
Precautions when carrying out operation
Special tool list
Sketch 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
Removal, installation of HST pump and 4-gear pump assembly
Removal, installation of HST motor 1 assembly
Removal, installation of HST motor 2 assembly
Removal, installation of work equipment control valve assembly
Removal, installation of travel damper valve assembly
Removal, installation of hydraulic tank assembly
Removal, installation of work equipment assembly
Disassembly and assembly of HST pump assembly
Disassembly and assembly of HST motor assembly
Disassembly, assembly of hydraulic cylinder assembly
Removal, installation of operator's cab assembly
Removal, installation of operator's cab glass (Stuckglass)
Removal, installation of center hinge pin
Removal, installation of counterweight
Removal, installation of air conditioner unit assembly
Removal, installation of air conditioner compressor assembly
Removal, installation of monitor panel
DISASSEMBLY AND ASSEMBLY
OTHERS
This manual will assist you in diagnosing, repairing, and adjusting for your 4wd wheeled loader.
You can use a Windows, Mac, or Android device to view this manual. You only need to have a PDF reader installed.
Covered Models (Europe):
WA320-5H (SN: H50051-)
Format: PDF, 972 pages
Language: English
Table of Contents:
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
GENERAL
GENERAL ASSEMBLY DRAWINGS
SPECIFICATIONS
WEIGHT TABLE
PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS
STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
Engine mount and transfer mount
Damper
Cooling system
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
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
Work equipment lever linkage
Hydraulic tank
gear pump unit
Accumulator (for PPC circuit)
Lock valve
E. C. S. S. valve
Accumulator (forE.C.S.S.)
Hydraulic piping of cooling system
Cooling fan motor
Work equipment control valve
Work equipment PPC valve
Attachment PPC valve
Work equipment linkage
Bucket
Bucket positioner and boom kick-out
Work equipment cylinder
Air conditioner
Machine monitoring system
Machine monitor
List of items displayed on monitor
Electrical system (HST controller system)
HST controller
Function of selecting directional selector switch
Engine start circuit
Engine stop circuit
Preheating circuit (automatic preheating system)
Parking brake circuit
Electronically controlled suspension system
Sensors
STANDARD VALUE TABLE FOR engine
STANDARD VALUE TABLE FOR CHASSIS
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 oil pressure
Bleeding air from brake circuit
Measuring parking brake performance
Measuring and adjusting work equipment control lever
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
Special functions of machine monitor
Pm CLINIC INSPECTION CHART
TESTING AND ADJUSTING
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 locat
ions
Connector layout drawing
TROUBLESHOOTING
Before troubleshooting code display
Before troubleshooting electrical system
Information contained in troubuleshooting table
TROUBLESHOOTING OF HST CONTROLLER SYSTEM (HST MODE)
Before troubleshooting code display
Before troubleshooting electrical system
Information contained in troubuleshooting table
TROUBLESHOOTING OF monitor SYSTEM (mon MODE)
Before troubleshooting electrical system
Information contained in troubuleshooting table
TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE)
Method of using troubleshooting chart
Failure code and cause table
TROUBLESHOOTING OF HYDRAULIC, MECHANICAL SYSTEM (H MODE)
Method of using troubleshooting charts
TROUBLESHOOTING OF ENGINE (S MODE)
How to read this manual
Precautions when carrying out operation
Special tool list
Sketch 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
Removal, installation of HST pump and 4-gear pump assembly
Removal, installation of HST motor 1 assembly
Removal, installation of HST motor 2 assembly
Removal, installation of work equipment control valve assembly
Removal, installation of travel damper valve assembly
Removal, installation of hydraulic tank assembly
Removal, installation of work equipment assembly
Disassembly and assembly of HST pump assembly
Disassembly and assembly of HST motor assembly
Disassembly, assembly of hydraulic cylinder assembly
Removal, installation of operator's cab assembly
Removal, installation of operator's cab glass (Stuckglass)
Removal, installation of center hinge pin
Removal, installation of counterweight
Removal, installation of air conditioner unit assembly
Removal, installation of air conditioner compressor assembly
Removal, installation of monitor panel
DISASSEMBLY AND ASSEMBLY
OTHERS
General
Generation
5HLanguage
EnglishModel of Truck
WA320-5HRegion
EuropeTruck Class
WA320Type of Document
Workshop ManualType of Truck
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