Komatsu WA600-6 Wheel Loader Service Manual
2,050 pages · Publication SEN00235-18
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- Models
- WA600-6
- Serial coverage
- 60001 and up
- Manual type
- Service Manual
- Pages
- 2,050
- Publication
- SEN00235-18
- Condition
- Brand new
What's inside
From the manual's own table of contents: 270 sections, 610 entries. See sample pages (PDF, 1611 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 and technical data
Specification dimension drawing
Specifications
Weight table
Table of fuel, coolant and lubricants
Engine and cooling system
Engine mount and transmission mount
Cooling system
Cooling fan pump
Cooling fan motor
Power train, Part 1
Power train
Power train system diagram
Show all 270 sections
Torque converter and transmission piping diagram
Torque converter
Modulation clutch
Torque converter regulator valve
Transmission
Transfer
Transmission control valve
ECMV
Main relief valve and torque converter relief valve
Lubrication relief valve
Power train, Part 2
Torque converter oil cooler
Torque converter oil filter
Drive shaft
Center support
Axle
Differential
Limited slip differential50 topics
- Final drive
- Steering system
- Steering piping diagram
- Steering column
- 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 system
- 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
- Undercarriage and frame
- Axle mount
- Center hinge pin
- Hydraulic system, Part 1
- Hydraulic piping diagram
- Work equipment control lever linkage
- Hydraulic tank
- Work equipment hydraulic pump
- Hydraulic system, Part 2
- Control valve
- CLSS
- Each function and operation of each valve
- Accumulator (for PPC circuit)
- Accumulator (for ECSS)
- Triple pump
- Work equipment
- Work equipment linkage
- Bucket
- Bucket positioner and boom kick-out
- Work equipment lubrication
- Work equipment cylinder
Cab and its attachments
ROPS cab
Air conditioner
Electrical system, Part 1
Machine monitor system
Machine monitor
Electrical system, Part 2
Work equipment control system
Transmission controller system
Electrical system, Part 3
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
Sketches of special tools
Measuring engine speed
Measuring exhaust gas color
Measuring exhaust temperature
Adjusting valve clearance
Testing compression pressures
Measuring blow-by pressure
Measuring engine oil pressure
Testing EGR valve and bypass valve drive 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 and gear shift 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 valve45 topics
- Measuring operating effort of AJSS lever (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 pressure
- 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 pressure
- 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
- accumulator with nitrogen gas
- brake accumulator with nitrogen gas
- 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
- and 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 performing troubleshooting
- How to proceed in troubleshooting
- Testing before troubleshooting
- Classification and procedures of troubleshooting
- Information in troubleshooting table
- Troubleshooting method for disconnecting wiring harness of pressure sensor system
- 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 Oil Filter Clogging
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 Oil Pressure Low
Failure code [2G43ZG] Rear Accumulator Oil Pressure Low
Failure code [44K0L4] (Bucket positioner: ON/OFF signals disagree)
Failure code [A000N1] (or VHMS_LED display: “n2” → “01”) Engine: Overrun
Failure code [AA1ANX] Air Cleaner Clogging
Failure code [AB00L6] Alternator: Signal disagrees with run and stop of engine
Failure code [AB00MA] Alternator: Malfunction
Failure code [B@BAZG] Engine oil pressure: Low error
Failure code [B@BAZK] Eng Oil Level Low
Failure code [B@BCNS] Engine coolant temperature: Overheating
Failure code [B@BCZK] Engine coolant level low
Failure code [B@C7NS] Brake oil overheating
Failure code [b@CENS] Torque converter oil overheating
Failure code [B@GAZK] Low Battery Fluid Level
Failure code [B@HANS] Hyd Oil Overheat
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 Temp Sensor High Error
Failure code [CA265] Fuel Temp Sensor Low Error56 topics
- 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] Sens Supply 1 Volt 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] Rail Press Sensor High Error
- Failure code [CA452] Rail Press Sensor Low Error
- Failure code [CA553] Common rail pressure high error 1
- Failure code [CA554] Common rail pressure sensor in range error
- Failure code [CA559] Supply pump pressure very low error 1
- Failure code [CA689] Engine Ne speed sensor error
- 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 [CA1228] EGR valve servo error 1
- Failure code [CA1625] EGR valve servo error 2
- Failure code [CA1626] Bypass valve solenoid current high error
- Failure code [CA1627] Bypass valve solenoid current low error
- Failure code [CA1628] Bypass Valve Servo Error 1
- Failure code [CA1629] Bypass Valve Servo Error 2
- Failure code [CA1631] Bypass valve lift sensor high error
- Failure code [CA1632] Bypass valve lift sensor low 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 [CA2271] EGR valve lift sensor high error
- Failure code [CA2272] EGR valve lift sensor low error
- Failure code [CA2351] EGR valve solenoid operation short circuit
- Failure code [CA2352] EGR valve solenoid operation disconnect
- Failure code [CA2555] Intake air heater relay open circuit error
- Failure code [CA2556] Intake air heater relay short circuit error
- Failure code [D191KA] AJSS neutral safety relay open circuit
- 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 open circuit
- Failure code [D5ZHKB] Terminal C signal short circuit
Failure code [D5ZHKZ] Terminal C signal open or short circuit1 topic
- stopped state
Failure code [DA80L4] Auto-greasing controller disagrees with ON/OFF signal
Failure code [DAF3KK] Machine monitor: Source voltage low (input)
Failure code [DAF5KP] Machine monitor: Output voltage low1 topic
- Defective communication (Abnormality in target component system)
Failure code [DAQ0KK] Transmission controller: Source voltage low
Failure code [DAQ0KT] Transmission controller: Defect in controller2 topics
- Low source voltage (input)
- Disagreement of model selection signals
Failure code [DAQRMA] Transmission controller (Option setting): Malfunction
Failure code [DB90KK] Work equipment controller: Source voltage low (input)
Failure code [DB90KT] Work equipment controller: Defect in controller2 topics
- Out of input signal range)
- Disagreement of model selection signals)
Failure code [DB9RMA] Work equipment controller (Option setting): Malfunction5 topics
- Defective operation)
- (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 time1 topic
- Switch is kept pressed for long time)
Failure code [DD1CLD] Load meter subtotal switch: Switch is kept pressed for long time40 topics
- pressed for long time)
- 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] Parking brake switch (Neutralizer): ON/OFF signals disagree
- pressed for long time)
- 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 shift-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
- 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)
- range)
- 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)
- range)
- operating state of engine)
Failure code [DHTBKA] Modulation clutch oil pressure sensor: Disconnection
Failure code [DHTBKB] Modulation clutch oil pressure sensor: Short circuit2 topics
- 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): Disconnection1 topic
- 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
Failure code [DK5BKA] Bucket EPC lever potentiometer (Main): Disconnection
Failure code [DK5BL8] Bucket EPC lever potentiometer (Main): Analog signals disagree
Failure code [DK5CKA] Bucket EPC lever potentiometer (Sub): Disconnection3 topics
- Disconnection
- Short circuit with power supply line
- Analog signals disagree
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: Disconnection1 topic
- disagree
Failure code [DLT3KA] Transmission output shaft speed sensor (2): Disconnection
Failure code [DLT4KB] Transmission output shaft speed sensor (1): Short circuit1 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: Disconnection50 topics
- 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
- power supply line)
- Failure code [DWM1KA] Work equipment neutral lock solenoid: Disconnection
- Failure code [DWM1KB] Work equipment neutral lock solenoid: Short circuit
- power supply line)
- Failure code [DWN6KA] Lift arm raise magnet detent solenoid: Disconnection
- Failure code [DWN6KB] Lift arm raise magnet detent solenoid: Short circuit
- supply line)
- Failure code [DWN7KA] Lift arm float magnet detent solenoid: Disconnection
- Failure code [DWN7KB] Lift arm float magnet detent solenoid: Short circuit
- supply line)
- Failure code [DWN8KA] Bucket tilt magnet detent solenoid: Disconnection
- Failure code [DWN8KB] Bucket tilt magnet detent solenoid: Short circuit
- Failure code [DWNFKA] Modulation clutch cut-off release solenoid: Disconnection
- Failure code [DWNFKB] Modulation clutch cut-off release solenoid: Short circuit
- 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
- 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 circuit1 topic
- supply line)
Failure code [DXHKKA] 3-spool valve retract EPC solenoid: Disconnection
Failure code [DXHKKB] 3-spool valve retract EPC solenoid: Short circuit
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: Malfunction4 topics
- (Exhaust gas temperature (F): Abnormal heat)
- (Exhaust gas temperature (F): Overheat)
- (Exhaust gas temperature (R): abnormal heat)
- (Exhaust gas temperature (R): 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
When starting switch is turned to ON position, machine monitor displays nothing
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
- and 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]50 topics
- 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 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 occurs
- or engine overheats)
- Method of using troubleshooting chart
- 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 drops
- 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 tools 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
Disassembly and assembly of operator’s seat assembly
Removal and installation of air conditioner unit assembly
Removal and installation of AJSS lever switch assembly23 topics
- 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
- Power train hydraulic circuit diagram
- Brake hydraulic circuit diagram
- Steering wheel specification
- Steering wheel specification with ECSS
- AJSS (Advanced Joystick Steering System) specification
- AJSS (Advanced Joystick Steering System) specification with ECSS
- 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 (2,050 pages). Open the sample pages (PDF, 1610 KB)
- Specifications, page 395: Machine monitor electrical circuit diagram (Steering wheel specification)
- Troubleshooting, page 1,077: Troubleshooting by failure code (Display of code), Part 4
- Diagram, page 1,480: Troubleshooting by failure code (Display of code), Part 11
- Foldout diagram, page 2,048: Connector arrangement diagram
Other manuals for this machine
Save 10% on 2 manuals, 15% on 3 or more. Other manuals for the WA600-6 are listed below. Editions cover different serial number ranges: check the serial coverage and tick only the ones that match your machine.
This manual: Service Manual SEN00235-18$209.51
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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, 2,050 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.
Other editions and similar models
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).