Komatsu Wheel Loader WA320-7 USA and up Workshop Service Repair Manual

Original Illustrated Factory Workshop Service Manual for Komatsu Wheel Loader WA320.

Original factory manuals for Komatsu Loaders, Dozers, Excavators contains high quality images, circuit diagrams and instructions to help you to operate, maintenance and repair your truck. All Manuals Printable, contains Searchable Text and Navigation Bookmarks

Covered models:
    WA320-7 USA sn:A36001 and up

Contents:
    00 Index and foreword .
        Index
        Foreword, safety and general information
        Important safety notice
        How to read the shop manual
        Explanation of terms for maintenance standard
        Handling equipment of fuel system devices
        Handling of intake system parts
        Handling of hydraulic equipment
        Method of disconnecting and connecting of push-pull type coupler
        Handling of electrical equipment
        How to read electric wire code
        Precautions when performing operation
        Practical use of KOMTRAX
        Standard tightening torque table
        List of abbreviation
        Conversion table
    01 Specification.
        Table of contents
        Specifications
        Specification drawing
        Specifications
        Weight table
        Table of fuel, coolant, and lubricants
    10 Structure and function .
        Table of contents
        Engine and cooling system
        Engine related parts
        KVGT
        EGR system piping drawing
        EGR system circuit diagram
        EGR valve
        EGR cooler
        KCCV layout drawing
        KCCV ventilator
        KDPF
        Cooling system
        Cooling fan motor
        Power train
        Power train system
        Layout of power train parts
        Damper
        HST pump
        HST motor1
        HST motor2
        Transfer
        Clutch solenoid valve
        Drive shaft
        Axle
        Differential
        Torque proportional differential
        Limited slip differential
        Final drive
        Steering system
        Layout of steering devices
        Steering column
        Priority valve
        Cushion valve
        Emergency steering valve
        Orbitrol valve
        Brake system
        Layout of brake parts
        Brake accumulator charge valve
        Brake valve
        Brake accumulator
        Slack adjuster
        Brake
        Parking brake control
        Parking brake
        Parking brake solenoid valve
        Undercarriage and frame
        Axle mount
        Center hinge pin
        Tire
        Hydraulic system
        Hydraulic component layout
        Work equipment control
        Hydraulic tank
        Double type gear pump
        Steering and work equipment pump
        Control valve
        CLSS
        Hydraulic circuit diagram and names of valves
        Self-pressure reducing valve
        Work equipment PPC valve
        Work equipment lock solenoid valve
        PPC circuit accumulator
        ECSS accumulator
        Work equipment
        Work equipment linkage
        Bucket
        Cab and its attachments
        ROPS cab
        Cab mount
        Electrical system
        Engine control system
        Preheating system
        Engine output limit function
        Automatic warm-up function
        Parking brake control system
        System operating lamp function
        Battery disconnect switch function
        HST controller system
        Machine monitor system
        Rearview monitor system
        KOMTRAX system
        System component parts
        Sensor
    20 Standard value tables.
        Table of contents
        Standard service value table
        Standard value table for engine
        Standard value table for machine
        Standard value table for electrical system
        30 Testing and adjusting
        Table of contents
        General information on testing and adjusting
        Tools for testing and adjusting
        Sketch of tools for testing and adjusting
        Engine and cooling system
        Testing engine speed
        Testing boost pressure
        Testing exhaust gas temperature
        Testing exhaust gas color
        Testing and adjusting valve clearance
        Testing compression pressure
        Testing blowby pressure
        Testing engine oil pressure
        Testing EGR valve and KVGT driving oil pressure
        Testing fuel pressure
        Testing fuel discharge, return and leakage
        Bleeding air from fuel system
        Testing fuel circuit for leakage
        Handling cylinder cutout mode operation
        Handling no-injection cranking operation
        Testing of KDPF and muffler stack for looseness and damage
        Testing of installed condition of cylinder heads and manifolds
        Testing engine piping for damage and looseness
        Testing and adjusting air conditioner compressor belt tension
        Replacing alternator belt
        Power train
        Testing oil leakage from axle final drive
        Testing drive shaft for looseness, backlash, and damage
        Testing accelerator pedal
        Testing and adjusting HST oil pressure
        Testing transfer clutch control pressure
        Steering system
        Testing directional lever
        Testing steering wheel
        Testing work equipment control lever
        Testing and adjusting steering circuit oil pressure
        Bleeding air from steering cylinder circuit
        Brake system
        Testing brake pedal
        Testing braking performance
        Testing and adjusting of accumulator charge pressure
        Testing wheel brake oil pressure
        Testing lowering of wheel brake pressure
        Testing wear of wheel brake disc
        Bleeding air from wheel brake circuit
        Releasing remaining pressure in brake accumulator circuit
        Testing parking brake performance
        Testing wear of parking brake disc
        Testing parking brake release pressure
        Method of releasing parking brake manually
        Hydraulic system
        Testing fan speed
        Testing fan circuit oil pressure
        Bleeding air from hydraulic fan circuit
        Testing and adjusting work equipment PPC oil pressure
        Testing and adjusting work equipment oil pressure
        Bleeding air from work equipment circuit
        Releasing remaining pressure from work equipment circuit
        Testing ECSS accumulator nitrogen gas pressure and procedure for charging accumulator with nitrogen gas
        Work equipment
        Testing and adjusting bucket positioner and bucket proximity switch
        Testing and adjusting boom position detection lever
        Electrical system
        Adjusting replaced, reassembled or added sensor, controller, etcwith machine monitor
        Special functions of machine monitor
        Angle adjustment of rear view camera
        Handling voltage circuit of engine controller
        Handling battery disconnect switch
        Testing diodes
        Pm clinic
        Pm Clinic service
        Check sheet
    40 Troubleshooting.
        Table of contents
        General information on troubleshooting
        Troubleshooting points
        Sequence of events in troubleshooting
        Checks before troubleshooting
        Inspection procedure before troubleshooting
        Preparation for troubleshooting of electrical system
        Classification and procedures for troubleshooting
        Symptom and troubleshooting numbers
        Information in troubleshooting table
        Procedure for troubleshooting wiring harness of pressure sensor system for open circuit
        Connector list and layout
        Connector contact identification
        T-branch box and T-branch adapter table
        Fuse location table
        Precautions for KDPF (KCSF and KDOC) Cleaning and Replacement
        Precautions when performing troubleshooting of machine monitor
        Processing procedure of harness checker for troubleshooting of machine monitor LCD unit
        Preparation of dummy temperature sensor (for KDOC and KDPF temperature
        sensors)
        Preparation of short circuit electrical connector (for failure codes [CA1883] and
        [CA3135])
        Failure codes table
        Troubleshooting by failure code (Display of code)
        Troubleshooting of electrical system (E-mode)
        Troubleshooting of hydraulic and mechanical system (H-mode)
        Information described in troubleshooting table (H-mode)
            System chart of hydraulic and mechanical systems
            Failure mode and cause table
        Troubleshooting of engine (S-mode)
            Information described in troubleshooting table (S mode)
    50 Disassembly and assembly .
        Table of contents
        General information on disassembly and assembly
        How to read this manual
        Coating materials list
        Special tools list
        Sketches of special tools
        Engine and cooling system
        Removal and installation of supply pump assembly
        Removal and installation of injector assembly
        Removal and installation of cylinder head assembly
        Removal and installation of engine hood assembly
        Removal and installation of radiator core assembly
        Removal and installation of aftercooler
        Removal and installation of hydraulic oil cooler
        Removal and installation of engine assembly
        Removal and installation of engine front oil seal
        Removal and installation of engine rear oil seal
        Removal and installation of cooling fan and fan motor assembly
        Removal and installation of KDPF assembly
        Disassembly and assembly of KDPF assembly
        Removal and installation of KCCV assembly
        Removal and installation of air cleaner assembly
        Removal and installation of KVGT assembly
        Removal and installation of EGR (Exhaust Gas Recirculation) valve assembly
        Removal and installation of EGR (Exhaust Gas Recirculation) cooler assembly
        Removal and installation of alternator belt
        Removal and installation of fuel tank assembly
        Power train
        Removal and installation of transfer assembly
        Disassembly and assembly of transfer assembly
        Removal and installation of front axle assembly
        Removal and installation of rear axle assembly
        Disassembly and assembly of axle housing assembly
        Disassembly and assembly of differential assembly
        Undercarriage and frame
        Removal and installation of center hinge pin
        Removal and installation of counterweight assembly
        Hydraulic system
        Removal and installation of hydraulic tank assembly
        Removal and installation of control valve assembly
        Disassembly and assembly of control valve assembly
        Removal and installation of hydraulic pump assembly
        Removal and installation of HST motor1 assembly
        Removal and installation of HST motor2 assembly
        Disassembly and assembly of hydraulic cylinder assembly
        Work equipment
        Removal and installation of work equipment assembly
        Cab and its attachments
        Removal and installation of operator's cab and floor frame assembly
        Removal and installation of operator's cab glass (adhered glass)
        Removal and installation of operator's seat assembly
        Removal and installation of seat belt
        Removal and installation of air conditioner unit assembly
        Removal and installation of air conditioner compressor
        Removal and installation of air conditioner condenser
        Electrical system
        Removal and installation of machine monitor assembly
        Removal and installation of engine controller assembly
        Removal and installation of HST controller assembly
        Removal and installation of air conditioner controller assembly
        Removal and installation of monitor controller assembly
        Removal and installation of mass air flow and temperature sensor
        Removal and installation of KOMTRAX terminal assembly
    60 Maintenance standard.
        Table of contents
        Engine and cooling system
        Engine related parts
        Cooling fan motor
        Power train
        Damper
        Transfer
        Drive shaft
        Axle
        Differential
        Limited slip differential
        Final drive
        Steering system
        Steering column
        Priority valve
        Emergency steering valve
        Steering cylinder
        Brake system
        Brake accumulator charge valve
        Slack adjuster
        Brake
        Parking brake
        Parking brake solenoid valve
        Undercarriage and frame
        Axle mount
        Center hinge pin
        Hydraulic system
        Hydraulic tank
        Double type gear pump
        Steering and work equipment pump
        Control valve
        Self-pressure reducing valve
        Work equipment PPC valve
        Work equipment lock solenoid valve
        Work equipment
        Work equipment linkage
        Bucket
        Work equipment cylinder
        Cab and its attachments
        Cab mount
        Electrical system
        Bucket positioner
        Fork positioner
        Remote boom positioner
        80 Appendix
        Table of contents
        Air conditioner components
        Precautions for refrigerant
        Air conditioner component
        Configuration and function of refrigeration cycle
        Outline of refrigeration cycle
        Air conditioner unit
        Dual pressure switch
        Air conditioner controller
        Compressor
        Condenser
        Receiver drier
        Sunlight sensor
        Outer temperature sensor (outside air temperature sensor)
        Procedure for testing and troubleshooting
        Circuit diagram and arrangement of connector pins
        System diagram
        Parts and connectors layout
        Testing with self-diagnosis function
        How to open the electrical system abnormality record screen in service mode of the machine
        monitor
        Testing temperature control system
        Testing vent (mode) changeover
        Testing FRESH/RECIRC air changeover
        Testing evaporator temperature sensor
        Testing relays
        Troubleshooting chart 1
        Troubleshooting chart 2
        Information in troubleshooting table
        Failure code list related to air conditioner
        Failure code [879AKA] A/C Inner Sensor Open Circuit
        Failure code [879AKB] A/C Inner Sensor Short Circuit
        Failure code [879BKA] A/C Outer Sensor Open Circuit
        Failure code [879BKB] A/C Outer Sensor Short Circuit
        Failure code [879CKA] Ventilating Sensor Open Circuit
        Failure code [879CKB] Ventilating Sensor Short Circuit
        Failure code [879DKZ] Sunlight Sensor Open or Short Circuit
        Failure code [879EMC] Ventilation Damper Abnormality
        Failure code [879FMC] Air Mix Damper Abnormality
        A-1 Troubleshooting for power supply and CAN communication system (Air conditioner does not operate)
        A-2 Troubleshooting for compressor and refrigerant system (Air is not cooled)
        A-3 Troubleshooting for blower motor system (No air comes out or air flow is abnormal)
        A-4 Troubleshooting for FRESH/RECIRC air changeover
        Troubleshooting with gauge pressure
        Connection of service tool
        Precautions for disconnecting and connecting hoses and tubes in air conditioner circuit
        Handling of compressor oil
    90 Diagrams and drawings
        Table of contents
        Hydraulic circuit diagram
        Symbols in hydraulic circuit diagram
        Hydraulic circuit diagram
        Electric circuit diagram
        Symbols in electric circuit diagram
        Electrical circuit diagram of machine body
        Electrical circuit diagram of floor
    Index.

Pages: 2039
Language: English
Format: PDF
Format: English
Compatible: All Versions Of Windows and Mac
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