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Komatsu WA600-6R Wheel Loader Service Manual

1,924 pages · Publication SEN02211-08

$199.93
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Models
WA600-6R
Serial coverage
65001 and up
Manual type
Service Manual
Pages
1,924
Publication
SEN02211-08
Condition
Brand new
Komatsu WA600-6R Wheel Loader Service Manual, publication SEN02211-08

What's inside

From the manual's own table of contents: 303 sections, 585 entries. See sample pages (PDF, 1618 KB)

Composition of shop manual
Safety notice
How to read the shop manual
Explanation of terms for maintenance standard
Handling of electric equipment and hydraulic component
Handling of connectors newly used for engines
How to read electric wire code
Precautions when carrying out operation
Method of disassembling and connecting push-pull type coupler
Standard tightening torque table
Conversion table
Specification dimension drawing
Specifications
Weight table
Table of fuel, coolant and lubricants
Engine mount and transmission mount
Cooling system
Cooling fan pump
Cooling fan motor
Power train
Power train system diagram
Torque converter and transmission piping diagram
Torque converter
Modulation clutch
Show all 303 sections
Torque converter regulator valve
Transmission
Transfer
Transmission control valve
ECMV
Main relief valve and torque converter relief valve
Lubrication relief valve
Torque converter oil cooler
Torque converter oil filter
Drive shaft
Center support
Axle
Differential
Limited slip differential
Final drive
Steering piping diagram
Steering column48 topics
  • Joystick steering lever linkage
  • Joystick EPC valve
  • Lock valve
  • Steering valve
  • Rotary valve
  • Steering control valve
  • Two-way restrictor valve
  • Stop valve
  • Steering pump
  • Steering cylinder
  • Emergency steering piping diagram
  • Diverter valve
  • Emergency steering pump
  • Brake piping diagram
  • Brake
  • Brake valve
  • Accumulator charge valve
  • EPC relief valve
  • Accumulator (for brake)
  • Slack adjuster
  • Parking brake
  • Parking brake solenoid valve
  • Emergency parking brake release valve
  • Brake cooling pump
  • Axle mount
  • Center hinge pin
  • Hydraulic piping diagram
  • Work equipment control lever linkage
  • Hydraulic tank
  • Work equipment hydraulic pump
  • Control valve
  • CLSS
  • Each function and operation of each valve
  • Accumulator (for PPC circuit)
  • Triple pump
  • Work equipment linkage
  • Bucket
  • Bucket positioner and boom kick-out
  • Work equipment lubrication
  • Work equipment cylinder
  • ROPS cab
  • Air conditioner
  • Machine monitor system
  • Machine monitor
  • Work equipment control system
  • Transmission controller system
  • Electric transmission control
  • Engine starting/stopping circuit
Parking brake circuit
Sensor
VHMS controller related
Work equipment electric lever
Standard service value table for engine
Standard service value table for chassis
Tools for testing, adjusting, and troubleshooting
Measuring engine speed
Measuring exhaust gas color
Measuring exhaust temperature
Adjusting valve clearance
Testing compression pressures
Measuring blow-by pressure
Measuring engine oil pressure
Measuring intake air (boost) pressure
Handling fuel system equipment
Releasing residual pressure in fuel system
Testing fuel pressures
Testing return rate and leakage
Bleeding air from fuel circuit
Testing leakage in fuel system
Handling reduced cylinder mode operation
Handling no-injection cranking operation
Handling controller voltage circuit
Replacing and adjusting alternator and air conditioner compressor belt tension
Adjusting modulation clutch speed sensor and speed sensor
Measuring directional lever (Steering wheel specification)
Testing and adjusting power train oil pressure
Flushing procedure for torque converter and transmission hydraulic circuit
Method of moving machine when transmission valve is broken
Adjusting steering stop valve
Measuring operating effort of AJSS lever (AJSS specification)
Testing and adjusting AJSS lever angle sensor and frame angle sensor (AJSS specification)
Testing and adjusting steering stopper bolt (AJSS specification)
Testing and adjusting steering wheel (Steering wheel specification)
Testing steering oil pressure
Bleeding air from steering cylinder circuit
Testing hydraulic drive fan
Bleeding air from hydraulic drive fan circuit
Measuring brake pedal
Measuring brake performance
Testing and adjusting accumulator charge pressure1 topic
  • accumulator with nitrogen gas
Testing wheel brake oil pressure
Measuring wear of wheel brake disc
Bleeding air from wheel brake circuit
Releasing residual pressure in brake accumulator circuit
Testing parking brake performance
Measuring parking brake oil pressure48 topics
  • Testing wear of parking brake disc
  • Method of releasing parking brake manually
  • Measuring and adjusting work equipment control lever
  • Measuring work equipment oil pressure
  • Bleeding air from work equipment circuit
  • Releasing residual pressure in work equipment circuit
  • Moving machine for removing operator cab
  • Testing and adjusting bucket positioner
  • Testing and adjusting lift arm position detecting lever
  • Checking proximity switch operation indication lamp
  • Preparations for work on troubleshooting of electric system
  • Procedure for testing diodes
    • additional installation for each sensor and controller
  • Special functions of machine monitor (EMMS)
  • VHMS controller initial setting procedure
  • Precautions for replacing VHMS controller
  • Pm-clinic inspection table
  • Failure codes list
  • Fuse locations
  • Points to remember when troubleshooting
  • Sequence of events in troubleshooting
  • Testing before troubleshooting
  • Classification and procedures of troubleshooting
  • Information contained in troubleshooting table
  • Phenomena looking like troubles and troubleshooting Nos
  • Connection table for connector pin numbers
  • T- branch box and T- branch adapter table
  • Failure code [1500L0] (TORQFLOW transmission : Double meshing)
  • Failure code [15B0NX] (Transmission filter: Clogged)
  • Failure code [15SAL1] (ECMV F clutch: When command current is OFF, fill signal is ON)
  • Failure code [15SALH] (ECMV F clutch: When command current is ON, fill signal is OFF)
  • Failure code [15SBL1] (ECMV R clutch: When command current is OFF, fill signal is ON)
  • Failure code [15SBLH] (ECMV R clutch: When command current is ON, fill signal is OFF)
  • Failure code [15SEL1] (ECMV (1): When command current is OFF, fill signal is ON)
  • Failure code [15SELH] (ECMV (1): When command current is ON, fill signal is OFF)
  • Failure code [15SFL1] (ECMV (2): When command current is OFF, fill signal is ON)
  • Failure code [15SFLH] (ECMV (2): When command current is ON, fill signal is OFF)
  • Failure code [15SGL1] (ECMV (3): When command current is OFF, fill signal is ON)
  • Failure code [15SGLH] (ECMV (3): When command current is ON, fill signal is OFF)
  • Failure code [15SHL1] (ECMV (4): When command current is OFF, fill signal is ON)
  • Failure code [15SHLH] (ECMV (4): When command current is ON, fill signal is OFF)
  • Failure code [15W0NT] (Transmission modulation clutch: Overheating)
  • Failure code [2F00MA] (Parking brake: Malfunction)
  • Failure code [2G42ZG] (Front accumulator: Low oil pressure)
  • Failure code [2G43ZG] (Rear accumulator: Low oil pressure)
  • Failure code [44K0L4] (Bucket positioner: ON/OFF signals disagree)
  • Failure code [A000N1] (or VHMS_LED display: “n2” o “01”) (Engine: Overrun)
  • Failure code [AA1ANX] (Air cleaner: Clogging)
Failure code [AB00L6] (Alternator: Signal disagrees with operating state of engine)
Failure code [AB00MA] (Alternator: Malfunction)
Failure code [B@BAZG] (Engine oil pressure: Low error)
Failure code [B@BAZK] (Engine oil: Low level)
Failure code [B@BCNS] (Engine coolant temperature: Overheating)
Failure code [B@BCZK] (Coolant: Low level)
Failure code [B@C7NS] (Brake oil: Overheating)
Failure code [b@CENS] (Torque converter oil: Overheating)
Failure code [B@GAZK] (Battery electrolyte: Low level)
Failure code [B@HANS] (Hydraulic oil: Overheating)
Failure code [CA111] (Abnormality in engine controller)
Failure code [CA115] (Engine Ne or Bkup speed sensor error)
Failure code [CA122] (Charge (boost) pressure sensor high error)
Failure code [CA123] (Charge (boost) pressure sensor low error)
Failure code [CA131] (Throttle sensor high error)
Failure code [CA132] (Throttle sensor low error)
Failure code [CA135] (Engine oil pressure sensor high error)
Failure code [CA141] (Engine oil pressure sensor low error)
Failure code [CA144] (Coolant temperature sensor high error)
Failure code [CA145] (Coolant temperature sensor low error)
Failure code [CA153] (Charge (boost) temperature sensor high error)
Failure code [CA154] (Charge (boost) temperature sensor low error)
Failure code [CA187] (Sensor power supply 2 low error)
Failure code [CA212] (Engine oil temperature sensor high error)
Failure code [CA213] (Engine oil temperature sensor low error)
Failure code [CA221] (Atmospheric pressure sensor high error)
Failure code [CA222] (Atmospheric pressure sensor low error)
Failure code [CA227] (Sensor power supply 2 high error)
Failure code [CA234] (Engine overspeed)
Failure code [CA238] (Ne speed sensor power supply error)
Failure code [CA263] (Fuel temperature sensor high error)
Failure code [CA265] (Fuel temperature sensor low error)
Failure code [CA271] (PCV1 Short circuit)
Failure code [CA272] (PCV1 Disconnection)
Failure code [CA273] (PCV2 Short circuit)
Failure code [CA274] (PCV2 Disconnection)
Failure code [CA322] (Injector #1 open/short error)
Failure code [CA323] (Injector #5 open/short error)
Failure code [CA324] (Injector #3 open/short error)
Failure code [CA325] (Injector #6 open/short error)
Failure code [CA331] (Injector #2 open/short error)
Failure code [CA332] (Injector #4 open/short error)
Failure code [CA342] (Calibration code inconsistency)
Failure code [CA351] (Injectors drive circuit error)
Failure code [CA352] (Sensor power supply 1 low error)
Failure code [CA386] (Sensor power supply 1 high error)
Failure code [CA431] (Idle validation switch error)
Failure code [CA432] (Idle validation action error)
Failure code [CA441] (Battery voltage low error)
Failure code [CA442] (Battery voltage high error)
Failure code [CA449] Common rail pressure high error 2
Failure code [CA451] (Common rail pressure sensor high error)
Failure code [CA452] (Common rail pressure sensor low error)
Failure code [CA553] (Common rail pressure high error 1)
Failure code [CA559] (Supply pump pressure very low error)
Failure code [CA689] (Engine Ne speed sensor error)45 topics
  • Failure code [CA731] (Engine Bkup speed sensor phase error)
  • Failure code [CA757] (All continuous data lost error)
  • Failure code [CA778] (Engine Bkup speed sensor error)
  • Failure code [CA1633] (KOMNET datalink timeout error)
  • Failure code [CA2185] (Throttle sensor supply voltage high error)
  • Failure code [CA2186] (Throttle sensor power supply low error)
  • Failure code [CA2249] (Supply pump pressure very low error 2)
  • Failure code [CA2555] (Intake heater relay disconnection error)
  • Failure code [CA2556] (Intake heater relay short circuit error)
  • Failure code [D191KA] (AJSS neutral safety relay: Disconnection)
  • Failure code [D191KB] (AJSS neutral safety relay: Short circuit)
  • Failure code [D192KA] (ECSS solenoid: Disconnection)
  • Failure code [D192KB] (ECSS solenoid: Short circuit)
  • Failure code [D192KY] (ECSS solenoid: Short circuit with power supply line)
  • Failure code [D198KA] (Transmission oil pressure bypass solenoid: Disconnection)
  • Failure code [D198KB] (Transmission oil pressure bypass solenoid: Short circuit)
    • Short circuit with power supply line)
  • Failure code [D5ZHKA] (Terminal C signal: Disconnection)
  • Failure code [D5ZHKB] (Terminal C signal: Short circuit)
  • Failure code [D5ZHKZ] (Terminal C signal: Disconnection or short circuit)
    • stopped state)
  • Failure code [DA80L4] (Auto grease controller: ON/OFF signals disagree)
  • Failure code [DAF3KK] (Machine monitor: Low source voltage (input))
  • Failure code [DAF5KP] (Machine monitor: Low output voltage)
    • Defective communication (Abnormality in target component system))
  • Failure code [DAQ0KK] (Transmission controller: Low source voltage)
  • Failure code [DAQ0KT] (Transmission controller: Abnormality in controller)
    • Low source voltage (input))
    • Disagreement of model selection signals)
    • Defective communication (Abnormality in target component system))
  • Failure code [DAQRMA] (Transmission controller CAN communication: Malfunction)
    • Defective communication (Abnormality in target component system)
  • Failure code [DB90KK] Work equipment controller: Low source voltage (input)
  • Failure code [DB90KT] (Work equipment controller: Abnormality in controller)
    • Low source voltage (input)
    • Out of input signal range)
    • Disagreement of model selection signals)
    • Defective communication (Abnormality in target component system)
  • Failure code [DB9RMA] (Work equipment controller CAN communication: Malfunction)
    • Defective operation)
    • Low source voltage (input)
    • (Disagreement of model selection signals)
  • battery power supply: Low source voltage (input)
  • V power supply output: Low output voltage)
  • communication: Defective communication (Abnormality in target component system)
Failure code [DD15LD] ( t switch (Panel switch 1): Switch is kept pressed for long time)
Failure code [DD16LD] ( U switch (Panel switch 2): Switch is kept pressed for long time)
Failure code [DD17LD] (< switch (Panel switch 3): Switch is kept pressed for long time)
Failure code [DD18LD] (> switch (Panel switch 4): Switch is kept pressed for long time)1 topic
  • Switch is kept pressed for long time)
Failure code [DD1CLD] (Load meter subtotal switch: Switch is kept pressed for long time)1 topic
  • for long time)
Failure code [DDA7L4] (RPM set ON/OFF switch: ON-OFF signals disagree
Failure code [DDA8KB] (RPM set idle-up/down selector switch (idle-up): Short circuit)
Failure code [DDA9KB] (RPM set idle-up/down selector switch (idle-down): Short circuit)
Failure code [DDB6L4] (Turn parking brake switch (Neutralizer): ON/OFF signals disagree)
Failure code [DDDBKA] (Traction adjustment dial: Disconnection)
Failure code [DDDBKB] (Traction adjustment dial: Short circuit)
Failure code [DDE5MA] (Emergency steering drive switch: Malfunction)
Failure code [DDK4KA] (AJSS FNR switch: Disconnection)
Failure code [DDK4KB] (AJSS FNR switch: Short circuit)
Failure code [DDK5L4] (AJSS shit-up/down switch: ON/OFF signals disagree)
Failure code [DDK6KA] (FNR lever switch: Disconnection)
Failure code [DDK6KB] (FNR lever switch: Short circuit)
Failure code [DDT0L4] (Shift mode selector switch: ON/OFF signals disagree)
Failure code [DDW9LD] (Kick-down switch: Switch is kept pressed for long time)
Failure code [DDWLLD] (Hold switch: Switch is kept pressed for long time)
Failure code [DDY0LD] (Load meter cancel switch: Switch is kept pressed for long time)
Failure code [DF10KA] (Transmission shift lever switch: Disconnection)
Failure code [DF10KB] (Transmission shift lever switch: Short circuit)1 topic
  • sensor: Out of input signal range)
Failure code [DGF1KA] (Transmission oil temperature sensor: Disconnection)
Failure code [DGF1KB] (Transmission oil temperature sensor: Short circuit)
Failure code [DGH2KX] (Hydraulic oil temperature sensor: Out of input signal range)
Failure code [DGR2KA] (Rear brake oil temperature sensor: Disconnection)
Failure code [DGR2KX] (Rear brake oil temperature sensor: Out of input signal range)
Failure code [DGT1KA] (Torque converter oil temperature sensor: Disconnection)
Failure code [DGT1KB] (Torque converter oil temperature sensor: Short circuit)
Failure code [DGT1KX] (Torque converter oil temperature sensor: Out of input signal range)37 topics
  • sensor (F): Disconnection)
    • sensor (F): Short circuit)
    • sensor (R): Disconnection)
    • sensor (R): Short circuit)
  • Failure code [DH21KA] (Work equipment pump oil pressure sensor: Disconnection)
  • Failure code [DH21KB] (Work equipment pump oil pressure sensor: Short circuit)
    • Short circuit)
    • Short circuit with power supply line)
  • Failure code [DHPCKX] (Lift arm cylinder bottom pressure sensor: Out of input signal range)
  • Failure code [DHPDKX] (Lift arm cylinder head pressure sensor: Out of input signal range)
    • operating state of engine)
    • Out of input signal range)
  • Failure code [DHTBKA] (Modulation clutch oil pressure sensor: Disconnection)
  • Failure code [DHTBKB] (Modulation clutch oil pressure sensor: Short circuit)
    • sensor (F): Out of input signal range)
    • sensor (R): Out of input signal range)
  • Failure code [DK30KA] (AJSS lever angle sensor: Disconnection)
  • Failure code [DK30KY] (AJSS lever angle sensor: Short circuit with power supply line)
  • Failure code [DK59KA] (Lift arm EPC lever potentiometer (Main): Disconnection)
    • power supply line)
  • Failure code [DK59L8] (Lift arm EPC lever potentiometer (Main): Analog signals disagree)
  • Failure code [DK5AKA] (Lift arm EPC lever potentiometer (Sub): Disconnection)
    • power supply line)
  • Failure code [DK5BKA] (Bucket EPC lever potentiometer (Main): Disconnection)
    • power supply line)
  • Failure code [DK5BL8] (Bucket EPC lever potentiometer (Main): Analog signals disagree)
  • Failure code [DK5CKA] (Bucket EPC lever potentiometer (Sub): Disconnection)
    • power supply line)
    • Disconnection)
    • Short circuit with power supply line)
    • Analog signals disagree)
    • Disconnection)
    • power supply line)
  • Failure code [DKA0KA] (Lift arm angle sensor: Disconnection)
  • Failure code [DKA0KX] (Lift arm angle sensor: Out of input signal range)
  • Failure code [DKA0KY] (Lift arm angle sensor: Short circuit with power supply line)
  • Failure code [DKA0L0] (Lift arm angle sensor: Improper position)
Failure code [DKD0KA] (Frame angle sensor: Disconnection)
Failure code [DKD0KY] (Frame angle sensor: Short circuit with power supply line)
Failure code [DKD0KZ] (AJSS lever and frame angle sensor: Disconnection or short circuit)
Failure code [DLFAKA] (Modulation clutch output shaft speed sensor: Disconnection)
Failure code [DLT3KA] (Transmission output shaft speed sensor (2): Disconnection)
Failure code [DLT3LC] (Transmission output shaft speed sensor (2): Speed signals disagree)
Failure code [DLT4KB] (Transmission output shaft speed sensor (1): Short circuit)1 topic
  • range)
Failure code [DUM1KB] (Remote positioner raise indicator lamp: Short circuit)
Failure code [DUM2KB] (Remote positioner lower indicator lamp: Short circuit)
Failure code [DV00KB] (Alarm buzzer: Short circuit)
Failure code [DW4PKA] (Lift arm raise EPC solenoid: Disconnection)
Failure code [DW4PKB] (Lift arm raise EPC solenoid: Short circuit)
Failure code [DW4PKY] (Lift arm raise EPC solenoid: Short circuit with power supply line)
Failure code [DW4QKA] (Lift arm lower EPC solenoid: Disconnection)
Failure code [DW4QKB] (Lift arm lower EPC solenoid: Short circuit)
Failure code [DW4QKY] (Lift arm lower EPC solenoid: Short circuit with power supply line)
Failure code [DW4RKA] (Bucket tilt EPC solenoid: Disconnection)
Failure code [DW4RKB] (Bucket tilt EPC solenoid: Short circuit)
Failure code [DW4RKY] (Bucket tilt EPC solenoid: Short circuit with power supply line)
Failure code [DW4SKA] (Bucket dump EPC solenoid: Disconnection)
Failure code [DW4SKB] (Bucket dump EPC solenoid: Short circuit)
Failure code [DW4SKY] (Bucket dump EPC solenoid: Short circuit with power supply line)
Failure code [DW7BKA] (Fan reverse solenoid: Disconnection)
Failure code [DW7BKB] (Fan reverse solenoid: Short circuit)
Failure code [DW7BKY] (Fan reverse solenoid: Short circuit with power supply line)
Failure code [DW7DKA] (Hydraulic drive fan neutral solenoid: Disconnection)
Failure code [DW7DKB] (Hydraulic drive fan neutral solenoid: Short circuit)1 topic
  • power supply line)
Failure code [DWM1KA] (Work equipment neutral lock solenoid: Disconnection)
Failure code [DWM1KB] (Work equipment neutral lock solenoid: Short circuit)
Failure code [DWN6KA] (Lift arm raise magnet detent solenoid: Disconnection)
Failure code [DWN6KB] (Lift arm raise magnet detent solenoid: Short circuit)1 topic
  • supply line)
Failure code [DWN7KA] (Lift arm float magnet detent solenoid: Disconnection)
Failure code [DWN7KB] (Lift arm float magnet detent solenoid: Short circuit)
Failure code [DWN8KA] (Bucket tilt magnet detent solenoid: Disconnection)
Failure code [DWN8KB] (Bucket tilt magnet detent solenoid: Short circuit)
Failure code [DWN8KY] (Bucket tilt magnet detent solenoid: Shorted with the power source)
Failure code [DWNFKA] (Modulation clutch cut-off release solenoid: Disconnection)
Failure code [DWNFKB] (Modulation clutch cut-off release solenoid: Short circuit)1 topic
  • power source line)
Failure code [DX16KA] (Fan pump EPC solenoid: Disconnection)
Failure code [DX16KB] (Fan pump EPC solenoid: Short circuit)
Failure code [DX16KY] (Fan pump EPC solenoid: Short circuit with power supply line)
Failure code [DXA1KA] (Pump PC-EPC solenoid: Disconnection)
Failure code [DXA1KB] (Pump PC-EPC solenoid: Short circuit)50 topics
  • Failure code [DXF0KA] (AJSS EPC solenoid: Disconnection)
  • Failure code [DXF0KB] (AJSS EPC solenoid: Short circuit)
  • Failure code [DXH1KA] (Lockup ECMV solenoid: Disconnection)
  • Failure code [DXH1KB] (Lockup ECMV solenoid: Short circuit)
  • Failure code [DXH1KY] (Lockup ECMV solenoid: Short circuit with power supply line)
  • Failure code [DXH4KA] (1st clutch ECMV solenoid: Disconnection)
  • Failure code [DXH4KB] (1st clutch ECMV solenoid: Short circuit)
  • Failure code [DXH4KY] (1st clutch ECMV solenoid: Short circuit with power supply line)
  • Failure code [DXH5KA] (2nd clutch ECMV solenoid: Disconnection)
  • Failure code [DXH5KB] (2nd clutch ECMV solenoid: Short circuit)
  • Failure code [DXH5KY] (2nd clutch ECMV solenoid: Short circuit with power supply line)
  • Failure code [DXH6KA] (3rd clutch ECMV solenoid: Disconnection)
  • Failure code [DXH6KB] (3rd clutch ECMV solenoid: Short circuit)
  • Failure code [DXH6KY] (3rd clutch ECMV solenoid: Short circuit with power supply line)
  • Failure code [DXH7KA] (R clutch ECMV solenoid: Disconnection)
  • Failure code [DXH7KB] (R clutch ECMV solenoid: Short circuit)
  • Failure code [DXH7KY] (R clutch ECMV solenoid: Short circuit with power supply line)
  • Failure code [DXH8KA] (F clutch ECMV solenoid: Disconnection)
  • Failure code [DXH8KB] (F clutch ECMV solenoid: Short circuit)
  • Failure code [DXH8KY] (F clutch ECMV solenoid: Short circuit with power supply line)
  • Failure code [DXHHKA] (4th clutch ECMV solenoid: Disconnection)
  • Failure code [DXHHKB] (4th clutch ECMV solenoid: Short circuit)
  • Failure code [DXHHKY] (4th clutch ECMV solenoid: Short circuit with power supply line)
  • Failure code [DXHJKA] (3-spool valve extract EPC solenoid: Disconnection)
  • Failure code [DXHJKB] (3-spool valve extract EPC solenoid: Short circuit)
    • supply line)
  • Failure code [DXHKKA] (3-spool valve retract EPC solenoid: Disconnection)
  • Failure code [DXHKKB] (3-spool valve retract EPC solenoid: Short circuit)
    • supply line)
  • Failure code [DXHPKA] (Modulation clutch solenoid: Disconnection)
  • Failure code [DXHPKB] (Modulation clutch solenoid: Short circuit)
  • Failure code [DXHPKY] (Modulation clutch solenoid: Short circuit with power source line)
  • Failure code [DXHPMA] (Modulation clutch solenoid: Malfunction)
  • Failure code [F@BBZL] (or VHMS_LED display: “n3” o “38”) (Blow-by pressure: High error)
    • Abnormal heat)
    • Overheat)
    • abnormal heat)
    • Overheat)
  • Before carrying out troubleshooting of electrical system
  • Information in troubleshooting table
  • Engine does not start
  • Wiper does not operate
  • Windshield washer does not operate
  • Headlamp, clearance lamp, tail lamp, and license lamp do not light up or go off
  • Working lamp does not light up or go off
  • Step lamp does not light up or go off
  • Turn signal lamp and hazard lamp do not light up or go off
  • Brake lamp does not light or it keeps lighting up
  • Backup lamp does not light or it keeps lighting up
  • Backup buzzer does not sound or it keeps sounding
Horn does not sound or it keeps sounding
Alarm buzzer does not sound or it keeps sounding
Air conditioner does not operate or stop
Electric priming pump does not operate or does not stop automatically
Method of using troubleshooting chart
Table of failure modes and causes
Machine does not start
Torque converter lockup is not switched (engine stalls)
Torque converter lockup is not turned on1 topic
  • gear is not shifted
Shocks are large at the times of starting and shifting gear
Time lag is large at the times of starting and shifting gear
Torque converter oil temperature is high
Steering does not turn [machine with steering wheel]
Steering does not turn [machine with AJSS]
Turning, response of steering is poor [machine with steering wheel]
Turning, response of AJSS is poor [machine with AJSS]
Steering is heavy [machine with steering wheel]
When machine turns, it shakes or makes large shocks [machine with steering wheel]
When machine turns, it shakes or makes large shocks [machine with AJSS]
Wheel brake does not work or does not work well
Wheel brake is not released or it drags
Parking brake does not work or does not work well
Parking brake is not released or it drags (including emergency release system)
Lift arm does not rise
Lift arm speed is low or rising force of lift arm is insufficient
When rising, lift arm comes to move slowly at specific height
Lift arm cylinder cannot hold down bucket (Bucket floats)
Hydraulic drifts of lift arm occur often
Lift arm wobbles during operation
Bucket does not tilt back
Bucket speed is low or tilting back force is insufficient
Bucket comes to operate slowly in the midst of tilting-back
Bucket cylinder cannot hold down bucket
Hydraulic drifts of bucket occur often
Bucket wobbles during travel with cargo (Work equipment valve is set to “HOLD”)
During operation of machine, engine speed lowers remarkably or engine stalls
Large shocks are made when work equipment starts and stops
When work equipment circuit is relieved singly, other work equipment moves
ECSS does not operate, and pitching bouncing occurs1 topic
  • engine overheats)
Engine does not start easily
Engine does not start
Engine does not pick up smoothly
Engine stops during operation
Engine does not rotate smoothly (Hunting occurs)
Engine lacks output (or lacks power)
Exhaust smoke is black (Incomplete combustion)
Oil is consumed much (or exhaust gas color is blue)
Engine oil becomes contaminated quickly
Fuel consumption is excessive
Coolant contains oil (blows back or reduces)
Oil pressure drops44 topics
  • Oil level rises (Water, fuel in oil)
  • Coolant temperature rises too high (Overheating)
  • Abnormal noise is made
  • Vibration is excessive
  • Air cannot be bled from fuel circuit
  • How to read this manual
  • Coating materials list
  • Special tool list
  • Sketches of special tools
  • Removal and installation of engine assembly
  • Removal and installation of radiator assembly
  • Removal and installation of air aftercooler
  • Removal and installation of cooling fan and fan motor assembly
  • Removal and installation of damper assembly
  • Disassembly and assembly of damper assembly
  • Removal and installation of fuel tank assembly
  • Removal and installation of engine hood assembly
  • Removal and installation of bulkhead assembly
  • Removal and installation of fuel supply pump assembly
  • Removal and installation of cylinder head assembly
  • Removal and installation of fuel injector assembly
  • Removal and installation of engine front seal
  • Removal and installation of engine rear seal
  • Removal and installation of parking brake assembly
  • Removal and installation of torque converter and transmission assembly
  • Disassembly and assembly of torque converter assembly
  • Disassembly and assembly of transmission assembly
  • Disassembly and assembly of transfer assembly
  • Disassembly and assembly of parking brake assembly
  • Removal and installation of front axle assembly
  • Removal and installation of rear axle assembly
  • Removal and installation of center support assembly
  • Disassembly and assembly of center support assembly
  • Disassembly and assembly of differential assembly
  • Removal and installation of final drive carrier assembly
  • Disassembly and assembly of final drive carrier assembly
  • Removal and installation of front final drive brake assembly
  • Disassembly and assembly of final drive assembly
  • Disassembly and assembly of brake assembly
  • Removal and installation of brake valve assembly
  • Disassembly and assembly of accumulator and charge valve assembly
  • Disassembly and assembly of slack adjustor assembly
  • Removal and installation of center hinge pin
  • Removal and installation of counterweight assembly
Removal and installation of hydraulic tank assembly
Removal and installation of hydraulic pump assembly
Removal and installation of control valve assembly
Disassembly and assembly of control valve assembly
Removal and installation of steering valve assembly
Removal and installation of ECSS accumulator assembly
Disassembly and assembly of hydraulic cylinder assembly
Removal and installation of work equipment assembly
Removal and installation of operator's cab assembly
Removal and installation of operator's cab glass (stuck glass)
Removal and installation of floor frame assembly
Removal and installation of engine controller assembly
Removal and installation of transmission controller assembly
Removal and installation of loader controller assembly
Removal and installation of VHMS controller assembly
Removal and installation of monitor assembly
Removal and installation of printer assembly
Removal and installation of air conditioner unit assembly
Power train hydraulic circuit diagram
Brake hydraulic circuit diagram
Work equipment hydraulic circuit diagram
Air conditioner electrical circuit diagram
Electrical circuit diagram (1/10)
Electrical circuit diagram (2/10)
Electrical circuit diagram (3/10)
Electrical circuit diagram (4/10)
Electrical circuit diagram (5/10)
Electrical circuit diagram (6/10)
Electrical circuit diagram (7/10)
Electrical circuit diagram (8/10)
Electrical circuit diagram (9/10)
Electrical circuit diagram (10/10)
Connector arrangement diagram

Inside this manual

Real pages from this service manual (1,924 pages). Open the sample pages (PDF, 1617 KB)

Sample pages from the Komatsu WA600-6R Wheel Loader Service Manual: Specifications, Diagram, Troubleshooting, Foldout diagram
  • Specifications, page 543: Atmospheric temperature sensor
  • Diagram, page 978: Failure code [CA274] (PCV2 Disconnection)
  • Troubleshooting, page 1,587: S-10 Fuel consumption is excessive
  • Foldout diagram, page 1,922: Connector arrangement diagram

This is a service manual

Here's how it compares to the other manual types.

This manual

Service manual

Factory repair procedures and technical information such as specifications, troubleshooting, and wiring and hydraulic diagrams, for the models and systems the manual covers. See What's inside for its topics.

Operator's manual

Safe operation, controls, maintenance schedules, lubrication points, inspections, and basic checks. Repair procedures are in the service manual.

Parts manual

Illustrated diagrams with factory part numbers for identifying components and ordering parts. Repair procedures are in the service manual.

Engine service manuals are sometimes sold separately, since certain machine models were offered with more than one engine option.

What it's used for

Factory manual for in-house farm and construction shop use. Straightforward, complete, and easy to follow. It contains the OEM information dealership service departments and parts counters use to diagnose problems, identify components, and perform maintenance or repairs correctly.

Service shops and owner/operators who repair their own equipment

Identifying correct parts and seeing how assemblies come apart and go back together

Keeping equipment running with less downtime

Factory manual, 1,924 pages

Quantity one is the manual described above.

Fast free USA shipping

Ships in 1 business day.

60-day returns

Free if the mistake is ours. A manual ordered in error must come back unopened in its shrink-wrap; you pay return shipping and a 20% restocking fee applies. Return policy

Binder not included

Manuals over about 300 pages may need a standard 3-ring binder, which you can buy locally to keep the pages organized for shop use.

Questions about model, serial number, engine coverage or contents? Contact us before purchasing and we'll help confirm it's the right manual. Please verify the manual type, machine model, serial number range and engine coverage before purchasing: manuals ordered in error carry a 20% restocking fee (return policy).