Komatsu WD600-6 Wheel Loader Service Manual
1,861 pages · Publication SEN04979-06
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- Models
- WD600-6
- Serial coverage
- 55001 and up
- Manual type
- Service Manual
- Pages
- 1,861
- Publication
- SEN04979-06
- Condition
- Brand new
What's inside
From the manual's own table of contents: 277 sections, 567 entries. See sample pages (PDF, 780 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
Damper
Cooling system
Cooling fan pump
Cooling fan motor
Power train
Power train system diagram
Torque converter and transmission piping diagram
Torque converter
Show all 277 sections
Modulation clutch
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 pump
- Control valve
- CLSS
- Functions and operation by valve
- Accumulator (for PPC circuit)
- Triple pump
- Work equipment linkage
- Cutting edge and end bit
- Work equipment lubrication
- Hydraulic 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
Electric lever (Work equipment)
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
Moving method of machine disabled by short-to-power failure in work equipment potentiometer
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 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 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
- Moving machine for removing operator cab
- 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 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 [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 [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)52 topics
- 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 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 [D198KA] (Transmission oil pressure bypass solenoid: Disconnection)
- Failure code [D198KB] (Transmission oil pressure bypass solenoid: Short circuit)
- Failure code [D198KY] (Transmission oil pressure bypass solenoid: 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)
- Failure code [D5ZHL6] (Terminal C signal: Signal does not match engine running or stopped state)
- Failure code [DA80L4] (Auto grease controller: ON/OFF signals disagree)
- Failure code [DAF3KK] (Machine monitor: Low source voltage (input))
- Failure code [DAF5KP] (5V power source output voltage defective)
- (Abnormality in target component system))
- Failure code [DAQ0KK] (Transmission controller: Low source voltage)
- Failure code [DAQ0KT] (Transmission controller: Abnormality in controller)
- Failure code [DAQ2KK] (Transmission controller load power supply line: Low source voltage (input))
- Disagreement of model selection signals)
- (Abnormality in target component system))
- Failure code [DAQRMA] (Transmission controller CAN communication: Malfunction)
- (Abnormality in target component system)
- Failure code [DB90KK] Work equipment controller: Low source voltage (input)
- Failure code [DB90KT] (Work equipment controller: Abnormality in controller)
- Failure code [DB92KK] Work equipment controller load power supply line: Low source voltage (input)
- Failure code [DB95KX] (Work equipment controller power supply output: 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)
- Failure code [DB9RMC] (CAN communication with transmission controller: Defective operation)
- Low source voltage (input)
- (VHMS controller: Disagreement of model selection signals)
- VHMS controller battery power supply: Low source voltage (input)
- (VHMS controller 5 V power supply output: Low output voltage)
- (VHMS controller 24 V power supply output: Low output voltage)
- (VHMS controller 12 V power supply output: Low output voltage)
- 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)
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)
Failure code [DDD1LD] (Pitch operation switch: Switch is kept 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 [DDP5KA] (Lock detection pressure switch of steering lock lever: Disconnection)
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 [DF10KA] (Transmission shift lever switch: Disconnection)
Failure code [DF10KB] (Transmission shift lever switch: Short circuit)1 topic
- (Atmospheric temperature 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)4 topics
- (Exhaust gas temperature sensor (F): Disconnection)
- (Exhaust gas temperature sensor (F): Short circuit)
- (Exhaust gas temperature sensor (R): Disconnection)
- (Exhaust gas temperature 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)
Failure code [DHE5KB] (or VHMS_LED display: “n3” o “32”) (Blow-by pressure sensor: Short circuit)52 topics
- (Blow-by pressure sensor: Short circuit with power supply line)
- Signal disagrees with operating state of engine)
- (Steering oil pressure sensor: Out of input signal range)
- Failure code [DHTBKA] (Modulation clutch oil pressure sensor: Disconnection)
- Failure code [DHTBKB] (Modulation clutch oil pressure sensor: Short circuit)
- (Front brake oil pressure sensor (F): Out of input signal range)
- (Rear brake oil pressure 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 EPC lever potentiometer (Main): Disconnection)
- Failure code [DK59KY] (Lift EPC lever potentiometer (Main): Short circuit with power supply line)
- Failure code [DK59L8] (Lift EPC lever potentiometer (Main): Analog signals disagree)
- Failure code [DK5AKA] (Lift EPC lever potentiometer (Sub): Disconnection)
- Failure code [DK5AKY] (Lift EPC lever potentiometer (Sub): Short circuit with power supply line)
- Failure code [DK5BKA] (Tilt & pitch EPC lever potentiometer (Main): Disconnection)
- Failure code [DK5BL8] (Tilt & pitch EPC lever potentiometer (Main): Analog signals disagree)
- Failure code [DK5CKA] (Tilt & pitch EPC lever potentiometer (Sub): Disconnection)
- Failure code [DK5CKY] (Tilt & pitch EPC lever potentiometer (Sub): Short circuit with power supply line)
- 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 [DLFALC] (Modulation clutch output shaft speed sensor: Speed signals disagree)
- 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)
- Failure code [DLT4KX] (Transmission output shaft speed sensor (1): Out of input signal range)
- Failure code [DV00KB] (Alarm buzzer: Short circuit)
- Failure code [DW4PKA] (Blade raise EPC solenoid: Disconnection)
- Failure code [DW4PKB] (Blade raise EPC solenoid: Short circuit)
- Failure code [DW4PKY] (Blade raise EPC solenoid: Short circuit with power supply line)
- Failure code [DW4QKA] (Blade lower EPC solenoid: Disconnection)
- Failure code [DW4QKB] (Blade lower EPC solenoid: Short circuit)
- Failure code [DW4QKY] (Blade lower EPC solenoid: Short circuit with power supply line)
- Failure code [DW4RKA] (Tilt & pitch EPC solenoid: Disconnection)
- Failure code [DW4RKB] (Tilt & pitch EPC solenoid: Short circuit)
- Failure code [DW4RKY] (Tilt & pitch EPC solenoid: Short circuit with power supply line)
- Failure code [DW4SKA] (Tilt & pitch EPC solenoid: Disconnection)
- Failure code [DW4SKB] (Tilt & pitch EPC solenoid: Short circuit)
- Failure code [DW4SKY] (Tilt & pitch 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 [DWM1KA] (Work equipment neutral lock solenoid: Disconnection)
- Failure code [DWM1KB] (Work equipment neutral lock solenoid: Short circuit)
- Failure code [DWM1KY] (Work equipment neutral lock solenoid: Short circuit with power supply line)
- Failure code [DWN7KA] (Blade float magnet detent solenoid: Disconnection)
- Failure code [DWN7KB] (Blade float magnet detent solenoid: Short circuit)
- Failure code [DWN7KY] (Blade float magnet detent solenoid: Short circuit with power supply line)
- Failure code [DWNFKA] (Modulation clutch cut-off release solenoid: Disconnection)
- Failure code [DWNFKB] (Modulation clutch cut-off release solenoid: Short circuit)
- Failure code [DWNFKY] (Modulation clutch cut-off release solenoid: Short circuit with 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] (RH pitch REAR EPC solenoid: Disconnection)
Failure code [DXHJKB] (RH pitch REAR EPC solenoid: Short circuit)
Failure code [DXHJKY] (RH pitch REAR EPC solenoid: Short circuit with power supply line)
Failure code [DXHKKA] (RH pitch FORWARD EPC solenoid: Disconnection)
Failure code [DXHKKB] (RH pitch FORWARD EPC solenoid: Short circuit)
Failure code [DXHKKY] (RH pitch FORWARD EPC solenoid: Short circuit with power 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)1 topic
- (Exhaust gas temperature (F): Abnormal heat)
Failure code [F@BYNS] (or VHMS_LED display: “n3” o “61”) (Exhaust gas temperature (F): Overheat)1 topic
- (Exhaust gas temperature (R): abnormal heat)
Failure code [F@BZNS] (or VHMS_LED display “n3” o “71”) (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 up54 topics
- 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 on
- Travel speed is slow, thrusting force is weak, uphill traveling power is weak, 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]
- 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)
- Blade does not rise
- Blade speed is low or rising force of lift is insufficient
- When rising, blade comes to move slowly at specific height
- Lift cylinder cannot hold down blade (Blade floats)
- Hydraulic drifts of blade occur often
- Blade wobbles during operation
- Blade does not tilt and pitch
- Blade speed is low or tilt and pitch force is insufficient
- Bucket comes to operate slowly in the midst of tilt and pitch
- Tilt & pitch cylinder cannot hold down blade
- Blade wobbles during travel when loaded (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
- Fan speed is abnormal (Fan sound and vibration are abnormally large or 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 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
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 assembly29 topics
- Removal and installation of control valve assembly
- Disassembly and assembly of control valve assembly
- Removal and installation of steering valve 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 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 machine monitor assembly
- Power train hydraulic circuit diagram
- Brake 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 list and stereogram
Inside this manual
Real pages from this service manual (1,861 pages). Open the sample pages (PDF, 780 KB)
- Troubleshooting, page 973: 303 Troubleshooting by failure code (Display of code), Part 3
- Diagram, page 1,281: 309 Troubleshooting by failure code (Display of code), Part 9
- Specifications, page 1,589: 202 Engine and cooling system, Part 2
- Foldout diagram, page 1,850: Electrical circuit diagram (2/10)
Other manuals for this machine
Save 10% on 2 manuals, 15% on 3 or more. Other manuals for the WD600-6 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 SEN04979-06$189.67
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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, 1,861 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).