Komatsu WA250-6 Install guide

WHEEL LOADER
SEN03813-03
WA250 -6
WA250PZ-6
SERIAL NUMBERS WA250- 75001
WA250PZ-75001 and up

WA250, 250PZ-6 00-100 1
SEN03822-03
WHEEL LOADER
WA250-6
WA250PZ-6
Machine model Serial number
WA250-6 75001 and up
WA250PZ-6 75001 and up
00 Index and foreword 00
100 Index
Composition of shop manual ..........................................................................................................................
2
Table of contents............................................................................................................................................. 4

SEN03822-03
00-100 2 WA250, 250PZ-6
Composition of shop manual
100 Index
Composition of shop manual 1
The contents of this shop manual are shown together with Form No. in a list.
Note 1: Always keep the latest version of this manual in accordance with this list and utilize accordingly.
The marks shown to the right of Form No. denote the following:
Q: New issue (to be filed additionally) q: Revision (to be replaced for each Form No.)
Note 2: This shop manual can be supplied for each Form No.
Note 3: To file this shop manual in the special binder for management, handle it as follows:
• Place a divider on the top of each section in thefile after matching the Tub No. with No. indicated
next to each Section Name shown in the table below:
• File overview and other materials in sections in the order shown below and utilize them accord-
ingly.
Section Title Form Number
Shop Manual, contents binder, binder label and tabs SEN03813-03
00 Index and foreword SEN03814-03
100 Index SEN03822-03
q
200 Foreword and general information SEN03823-01
01 Specification SEN03815-00
100 Specification and technical data SEN03824-00
10 Structure, function and maintenance standard SEN03816-01
100 Engine and cooling system SEN03825-00
200 Power train SEN03826-00
300 Steering system SEN03827-01
400 Brake system SEN03828-00
500 Undercarriage and frame SEN03829-00
600 Hydraulic system SEN03830-00
700 Work equipment SEN03831-00
800 Cab and its attachments SEN03832-00
910 Electrical system, Part 1 SEN03833-01
920 Electrical system, Part 2 SEN03834-01
20 Standard value table SEN03817-00
100 Standard service value table SEN03835-00
30 Testing and adjusting SEN03818-02
110 Testing and adjusting, Part 1 SEN03836-01
120 Testing and adjusting, Part 2 SEN03837-01
q
130 Testing and adjusting, Part 3 SEN03838-00

SEN03822-03
WA250, 250PZ-6 00-100 3
Composition of shop manual
100 Index
40 Troubleshooting SEN03819-01
100 Failure code table and fuse locations SEN03839-00
200 General information on troubleshooting SEN03840-01
310 Troubleshooting by failure code (Display of code), Part 1 SEN03841-00
320 Troubleshooting by failure code (Display of code), Part 2 SEN03842-00
330 Troubleshooting by failure code (Display of code), Part 3 SEN03843-00
340 Troubleshooting by failure code (Display of code), Part 4 SEN03844-00
350 Troubleshooting by failure code (Display of code), Part 5 SEN03845-00
360 Troubleshooting by failure code (Display of code), Part 6 SEN03846-00
370 Troubleshooting by failure code (Display of code), Part 7 SEN03847-00
400 Troubleshooting of electrical system (E-mode) SEN03848-00
500 Troubleshooting of hydraulic and mechanical system (H-mode) SEN03849-00
600 Troubleshooting of engine (S-mode) SEN03850-00
50 Disassembly and assembly SEN03820-02
100 General information on disassembly and assembly SEN03851-01
200 Engine and cooling system SEN03852-00
310 Power train, Part 1 SEN03853-00
320 Power train, Part 2 SEN03854-00
400 Undercarriage and frame SEN03855-00
500 Hydraulic system SEN03856-00
600 Work equipment SEN03857-01
700 Cab and its attachments SEN03858-00
800 Electrical system SEN03859-00
90 Diagrams and drawings SEN03821-01
100 Hydraulic diagrams and drawings SEN03860-01
200 Electrical diagrams and drawings SEN03861-01

SEN03822-03
00-100 4 WA250, 250PZ-6
Table of contents
100 Index
Table of contents 1
00 Index and foreword
100 Index SEN03822-03
Composition of shop manual......................................................................................................................... 2
Table of contents........................................................................................................................................... 4
200 Foreword and general information SEN03823-01
Safety notice ................................................................................................................................................. 2
How to read the shop manual....................................................................................................................... 7
Explanation of terms for maintenance standard............................................................................................ 9
Handling of electric equipment and hydraulic component............................................................................. 11
Handling of connectors newly used for engines............................................................................................ 20
How to read electric wire code...................................................................................................................... 23
Precautions when carrying out operation...................................................................................................... 26
Method of disassembling and connecting push-pull type coupler................................................................. 29
Standard tightening torque table................................................................................................................... 32
Conversion table........................................................................................................................................... 36
01 Specification
100 Specification and technical data SEN03824-00
Specification dimension drawing................................................................................................................... 3
Specifications................................................................................................................................................ 4
Weight table .................................................................................................................................................. 8
Table of fuel, coolant and lubricants.............................................................................................................. 10
10 Structure, function and maintenance standard
100 Engine and cooling system SEN03825-00
Engine mount and transfer mount................................................................................................................. 2
Damper ......................................................................................................................................................... 3
Cooling system.............................................................................................................................................. 4
Cooling system hydraulic piping diagram...................................................................................................... 5
Cooling fan motor.......................................................................................................................................... 7
200 Power train SEN03826-00
Power train.................................................................................................................................................... 3
Power train system diagram.......................................................................................................................... 4
Drive shaft..................................................................................................................................................... 6
HST hydraulic piping diagram....................................................................................................................... 7
HST pump..................................................................................................................................................... 8
HST motor..................................................................................................................................................... 16
Transfer......................................................................................................................................................... 22
Clutch solenoid valve.................................................................................................................................... 33
Axle............................................................................................................................................................... 34
Differential..................................................................................................................................................... 36
Torque proportioning differential.................................................................................................................... 41
Limited slip differential................................................................................................................................... 44
Final drive...................................................................................................................................................... 48
300 Steering system SEN03827-01
Steering piping diagram ................................................................................................................................ 3
Steering column ............................................................................................................................................ 4
Priority valve.................................................................................................................................................. 5
Orbit-roll valve............................................................................................................................................... 8
2-way restrictor valve.................................................................................................................................... 16
Cushion valve................................................................................................................................................ 17
Steering cylinder............................................................................................................................................ 18
Emergency steering piping diagram.............................................................................................................. 20
Emergency steering valve............................................................................................................................. 21
Steering relief valve....................................................................................................................................... 24

SEN03822-03
WA250, 250PZ-6 00-100 5
Table of contents
100 Index
400 Brake system SEN03828-00
Brake piping diagram..................................................................................................................................... 3
Charge valve ................................................................................................................................................. 4
Brake valve.................................................................................................................................................... 8
Inching valve.................................................................................................................................................. 12
Accumulator (for brake)................................................................................................................................. 13
Slack adjuster................................................................................................................................................ 14
Brake............................................................................................................................................................. 16
Parking brake control..................................................................................................................................... 21
Parking brake ................................................................................................................................................ 22
500 Undercarriage and frame SEN03829-00
Axle mount and center hinge pin................................................................................................................... 2
Tires............................................................................................................................................................... 7
600 Hydraulic system SEN03830-00
Work equipment hydraulic piping diagram .................................................................................................... 2
Work equipment control lever linkage ........................................................................................................... 6
Hydraulic tank................................................................................................................................................ 10
4-gear pump.................................................................................................................................................. 12
Work equipment control valve ....................................................................................................................... 14
PPC valve...................................................................................................................................................... 39
Lock valve...................................................................................................................................................... 54
Accumulator (for PPC circuit)........................................................................................................................ 55
Bypass valve ................................................................................................................................................. 56
Quick coupler solenoid valve......................................................................................................................... 59
ECSS valve ................................................................................................................................................... 60
Accumulator (for ECSS)................................................................................................................................ 62
700 Work equipment SEN03831-00
Work equipment linkage................................................................................................................................ 2
Bucket............................................................................................................................................................ 6
Bucket positioner and boom kick-out............................................................................................................. 10
Work equipment cylinder............................................................................................................................... 23
800 Cab and its attachments SEN03832-00
Cab................................................................................................................................................................ 3
Air conditioner................................................................................................................................................ 4
910 Electrical system, Part 1 SEN03833-01
Machine monitor system................................................................................................................................ 2
Machine monitor............................................................................................................................................ 6
920 Electrical system, Part 2 SEN03834-01
Electrical system (HST controller system)..................................................................................................... 2
HST controller................................................................................................................................................ 18
ECSS system ................................................................................................................................................ 20
KOMTRAX system ........................................................................................................................................ 22
Engine starting circuit .................................................................................................................................... 24
Engine stopping circuit .................................................................................................................................. 26
Preheating circuit........................................................................................................................................... 27
Engine output derating function..................................................................................................................... 28
Automatic warm-up function.......................................................................................................................... 28
Parking brake circuit...................................................................................................................................... 29
Coupler plunger control system..................................................................................................................... 32
Multi-function knob ........................................................................................................................................ 33
Max. traction switch....................................................................................................................................... 34
Sensor........................................................................................................................................................... 35
20 Standard value table
100 Standard service value table SEN03835-00
Standard service value table for engine ........................................................................................................ 2
Standard service value table for chassis....................................................................................................... 3

SEN03822-03
00-100 6 WA250, 250PZ-6
Table of contents
100 Index
30 Testing and adjusting
110 Testing and adjusting, Part 1 SEN03836-01
Tools for testing, adjusting, and troubleshooting........................................................................................... 4
Sketches of special tools............................................................................................................................... 9
Measuring engine speed............................................................................................................................... 10
Measuring exhaust gas color........................................................................................................................ 12
Adjusting valve clearance ............................................................................................................................. 14
Measuring compression pressure................................................................................................................. 16
Measuring blow-by pressure......................................................................................................................... 19
Measuring engine oil pressure...................................................................................................................... 20
Measuring intake air (boost) pressure........................................................................................................... 21
Handling fuel system equipment................................................................................................................... 23
Releasing residual pressure in fuel system................................................................................................... 23
Measuring fuel pressure................................................................................................................................ 24
Measuring fuel return rate and leakage ........................................................................................................ 26
Bleeding air from fuel circuit.......................................................................................................................... 30
Testing leakage in fuel system...................................................................................................................... 31
Handling reduced cylinder mode operation................................................................................................... 32
Handling no-injection cranking operation...................................................................................................... 32
Handling controller voltage circuit................................................................................................................. 33
Check of muffler and muffler stack for looseness and damage .................................................................... 33
Check of muffler function .............................................................................................................................. 34
Check of installed condition of cylinder head and manifolds......................................................................... 34
Check of engine piping for damage and looseness...................................................................................... 35
Testing and adjusting air conditioner compressor belt tension...................................................................... 35
Replacing alternator belt............................................................................................................................... 36
120 Testing and adjusting, Part 2 SEN03837-01
Checking operating force of accelerator pedal.............................................................................................. 3
Checking directional lever............................................................................................................................. 4
Testing and adjusting HST oil pressure......................................................................................................... 5
Testing clutch control pressure...................................................................................................................... 9
Testing and adjusting steering wheel............................................................................................................ 10
Testing and adjusting steering oil pressure................................................................................................... 12
Bleeding air from steering circuit................................................................................................................... 14
Testing hydraulic fan ..................................................................................................................................... 15
Measuring brake pedal.................................................................................................................................. 17
Testing and adjusting brake pedal linkage.................................................................................................... 18
Measuring brake performance...................................................................................................................... 19
Testing and adjusting accumulator charge pressure..................................................................................... 20
Testing wheel brake oil pressure................................................................................................................... 22
Testing wear of brake disc............................................................................................................................. 25
Bleeding air from wheel brake circuit............................................................................................................ 26
Releasing residual pressure in brake accumulator circuit............................................................................. 27
Testing parking brake performance............................................................................................................... 28
Testing and adjusting parking brake control cable ........................................................................................ 29
Measuring and adjusting work equipment control lever................................................................................ 30
Testing and adjusting work equipment hydraulic pressure............................................................................ 31
Testing work equipment PPC oil pressure .................................................................................................... 32
Bleeding air from hydraulic circuit................................................................................................................. 34
Releasing remaining pressure in hydraulic circuit......................................................................................... 35
Testing and adjusting bucket positioner........................................................................................................ 36
Testing and adjusting of boom kick-out switch.............................................................................................. 37
Checking proximity switch operation pilot lamp ............................................................................................ 38
Procedure for testing diodes......................................................................................................................... 39
Preparation work for troubleshooting for electric system.............................................................................. 41
Starting KOMTRAX terminal operations........................................................................................................ 45
Indicator lamps of KOMTRAX terminal......................................................................................................... 49

SEN03822-03
WA250, 250PZ-6 00-100 7
Table of contents
100 Index
130 Testing and adjusting, Part 3 SEN03838-00
Adjusting machine monitor............................................................................................................................ 2
Adjusting replaced, reassembled or added sensor, controller, etc. with machine monitor ............................ 3
Special functions of machine monitor (EMMS).............................................................................................. 5
Pm clinic inspection chart.............................................................................................................................. 59
40 Troubleshooting
100 Failure code table and fuse locations SEN03839-00
Failure codes table........................................................................................................................................ 2
Fuse locations ............................................................................................................................................... 8
200 General information on troubleshooting SEN03840-01
Points to remember when troubleshooting.................................................................................................... 2
Sequence of events in troubleshooting ......................................................................................................... 3
Testing before troubleshooting ...................................................................................................................... 4
Classification and procedures of troubleshooting.......................................................................................... 5
Information contained in troubleshooting table.............................................................................................. 8
Connection table for connector pin numbers................................................................................................. 10
T- branch box and T- branch adapter table ................................................................................................... 46
310 Troubleshooting by failure code (Display of code), Part 1 SEN03841-00
Failure code [2G40GZ] Brake: Oil pressure reduction .................................................................................. 2
Failure code [6091NX] HST filter: Clogging................................................................................................... 4
Failure code [989FN1] Travel speed: Overrun alarm .................................................................................... 6
Failure code [AB00L6] Alternator R system: Hot short.................................................................................. 8
Failure code [AB00MA] Alternator R system: Ground fault/Disconnection charge/Low charge voltage ....... 10
Failure code [B@BAZG] Engine: Oil pressure reduction............................................................................... 12
Failure code [B@BCNS] Engine: Overheat................................................................................................... 13
Failure code [B@BCZK] Engine: Low coolant level ...................................................................................... 14
Failure code [B@C6NS] Front brake: High oil temperature .......................................................................... 16
Failure code [B@CRNS] HST: High oil temperature ..................................................................................... 17
320 Troubleshooting by failure code (Display of code), Part 2 SEN03842-00
Failure code [CA111] Abnormality in engine controller.................................................................................. 3
Failure code [CA115] Engine Ne or Bkup speed sensor error.......................................................................4
Failure code [CA122] Charge pressure sensor high error............................................................................. 6
Failure code [CA123] Charge pressure sensor low error.............................................................................. 8
Failure code [CA131] Throttle sensor high error ........................................................................................... 10
Failure code [CA132] Throttle sensor low error............................................................................................. 12
Failure code [CA144] Coolant sensor high error........................................................................................... 14
Failure code [CA145] Coolant sensor low error............................................................................................. 16
Failure code [CA153] Charge temperature sensor high error .......................................................................18
Failure code [CA154] Charge temperature sensor low error......................................................................... 20
Failure code [CA155] Derating of speed by abnormally high charge temperature........................................ 22
Failure code [CA187] Sensor power supply 2 low error................................................................................ 24
Failure code [CA221] Atmospheric pressure sensor high error.....................................................................26
Failure code [CA222] Atmospheric sensor low error..................................................................................... 28
Failure code [CA227] Sensor power supply 2 high error............................................................................... 30
Failure code [CA234] Engine overspeed....................................................................................................... 31
Failure code [CA238] Ne speed sensor power supply error.......................................................................... 32
Failure code [CA271] IMV (IMA) Short circuit................................................................................................ 33
Failure code [CA272] IMV (IMA) Disconnection............................................................................................ 34
Failure code [CA322] Injector #1 open/short error ........................................................................................ 36
Failure code [CA323] Injector #5 open/short error ........................................................................................ 38
Failure code [CA324] Injector #3 open/short error ........................................................................................ 40
Failure code [CA325] Injector #6 open/short error ........................................................................................ 42
Failure code [CA331] Injector #2 open/short error ........................................................................................ 44
Failure code [CA332] Injector #4 open/short error ........................................................................................ 46
Failure code [CA342] Calibration code inconsistency................................................................................... 48
Failure code [CA351] Injectors drive circuit error .......................................................................................... 50

SEN03822-03
00-100 8 WA250, 250PZ-6
Table of contents
100 Index
Failure code [CA352] Sensor power supply 1 low error................................................................................ 52
Failure code [CA386] Sensor power supply 1 high error .............................................................................. 54
330 Troubleshooting by failure code (Display of code), Part 3 SEN03843-00
Failure code [CA428] Abnormally high level in water sensor........................................................................ 4
Failure code [CA429] Abnormally low level in water sensor......................................................................... 6
Failure code [CA431] Idle validation switch error.......................................................................................... 8
Failure code [CA432] Idle validation action error.......................................................................................... 12
Failure code [CA435] Engine oil pressure switch error................................................................................. 16
Failure code [CA441] Battery voltage low error ............................................................................................ 17
Failure code [CA442] Battery voltage high error........................................................................................... 20
Failure code [CA449] Common rail pressure high error 2............................................................................. 22
Failure code [CA451] Common rail pressure sensor high error.................................................................... 24
Failure code [CA452] Common rail pressure sensor low error..................................................................... 26
Failure code [CA488] Derating of torque by abnormally high charge temperature....................................... 28
Failure code [CA553] Common rail pressure high error 1............................................................................. 29
Failure code [CA559] Supply pump pressure very low error......................................................................... 30
Failure code [CA689] Engine Ne speed sensor error ................................................................................... 32
Failure code [CA731] Engine Bkup speed sensor phase error..................................................................... 34
Failure code [CA757] All continuous data lost error...................................................................................... 35
Failure code [CA778] Engine Bkup speed sensor error................................................................................ 38
Failure code [CA1633] KOMNET datalink timeout error............................................................................... 40
Failure code [CA2185] Throttle sensor supply voltage high error.................................................................44
Failure code [CA2186] Throttle sensor power supply low error....................................................................46
Failure code [CA2249] Supply pump pressure very low error 2.................................................................... 48
Failure code [CA2311] Abnormality in IMV (IMA) solenoid........................................................................... 50
Failure code [CA2555] Intake heater relay disconnection error.................................................................... 52
Failure code [CA2556] Intake heater relay short circuit error........................................................................ 54
340 Troubleshooting by failure code (Display of code), Part 4 SEN03844-00
Failure code [D160KY] Backup alarm/lamp relay 1 circuit: Hot short ........................................................... 2
Failure code [D192KY] ECSS solenoid relay: Hot short ............................................................................... 4
Failure code [D1B0KA] HST safety relay: Disconnection ............................................................................. 6
Failure code [D1B0KB] HST safety relay: Ground fault................................................................................ 8
Failure code [D1B0KY] HST safety relay: Hot short ..................................................................................... 10
Failure code [D5ZHL6] IGN C system: Ground fault/Disconnection............................................................. 12
Failure code [DAF3KK] UNSW power supply: Ground fault/Disconnection.................................................. 14
Failure code [DAFRKR] Machine monitor CAN-NET Signal: Disconnection ................................................ 16
Failure code [DAJ0KK] HST controller power supply: Low voltage .............................................................. 20
Failure code [DAJ0KT] HST controller memory (EEPROM): Abnormality.................................................... 22
Failure code [DAJ1L4] HST controller main power line: Disconnection/Ground fault................................... 24
Failure code [DAJ1L6] HST controller main power line: Hot short................................................................ 26
Failure code [DAJ2KK] Controller solenoid power supply: Low voltage ....................................................... 28
Failure code [DAJ2L3] HST controller load power supply holding line: Hot short in wiring harness............. 30
Failure code [DAJ2L4] HST controller load power supply holding line: Disconnection/Ground fault............ 32
Failure code [DAJ5KX] Sensor 5V power supply: Out of output range......................................................... 34
Failure code [DAJ9KQ] HST controller model selection: Disagreement of model selection signals............. 36
Failure code [DAJRKR] HST controller CAN-NET signal: Disconnection..................................................... 37
Failure code [DAJRMA] HST controller: Disagreement in option selection .................................................. 43
350 Troubleshooting by failure code (Display of code), Part 5 SEN03845-00
Failure code [DB2RKR] Engine controller CAN-NET: Disconnection in signal line....................................... 3
Failure code [DD1NL4] Fan automatic reverse switch signal: Abnormality .................................................. 8
Failure code [DD1NLD] Fan reverse switch signal: Abnormality .................................................................. 10
Failure code [DDB6KA] Parking brake switch A: Disconnection/Hot short................................................... 12
Failure code [DDB6KB] Parking brake switch B: Ground fault......................................................................14
Failure code [DDB6KZ] Parking brake switch (bottom switch) or parking brake reminder switch
(intermediate switch): Trouble................................................................................................................. 16
Failure code [DDB6L0] Parking brake switch A: Ground fault ......................................................................18
Failure code [DDB6L4] Parking brake switch B: Disconnection/Hot short.................................................... 20
Failure code [DDD7KX] Travel speed control dial signal: Disconnection/Ground fault................................. 22

SEN03822-03
WA250, 250PZ-6 00-100 9
Table of contents
100 Index
Failure code [DDD7KY] Travel speed control dial signal: Hot short.............................................................. 24
Failure code [DDE5MA] Emergency steering operation switch: Disconnection............................................ 26
Failure code [DDK3KA] Directional selector switch: Disconnection/Hot short............................................... 28
Failure code [DDK3KB] Directional selector switch: Ground fault.................................................................30
Failure code [DDK6KA] FNR lever: Disconnection/Ground fault................................................................... 32
Failure code [DDK6KY] FNR lever: Hot short................................................................................................ 36
Failure code [DDS5L6] Steering: Low oil pressure (Operation of emergency steering)................................ 38
360 Troubleshooting by failure code (Display of code), Part 6 SEN03846-00
Failure code [DF10KA] Travel speed range selector switch: Disconnection/Ground fault ............................ 3
Failure code [DF10KB] Travel speed range selector switch: Hot short......................................................... 6
Failure code [DGH1KX] HST oil temperature sensor: Ground fault.............................................................. 8
Failure code [DGR2KB] Brake oil temperature sensor: Ground fault............................................................ 9
Failure code [DGR2KZ] Brake oil temperature sensor: Disconnection/Hot short.......................................... 10
Failure code [DHH1KX] HST oil pressure sensor: Disconnection/Ground fault............................................ 12
Failure code [DHH1KY] HST oil pressure sensor: Hot short......................................................................... 14
Failure code [DHTCL6] HST filter clogging sensor: Functional defect.......................................................... 16
Failure code [DJF1KA] Fuel level sensor: Disconnection/Hot short.............................................................. 18
Failure code [DLT3KX] Travel speed sensor B: Abnormality......................................................................... 20
Failure code [DLT4KX] Travel speed sensor A: Abnormality......................................................................... 24
Failure code [DLT4LC] Travel speed sensor A & B: Abnormality.................................................................. 26
Failure code [DV00KY] Alarm buzzer: Hot short........................................................................................... 28
Failure code [DW26KA] Motor 2 solenoid: Disconnection/Ground fault........................................................ 30
Failure code [DW26KY] Motor 2 solenoid: Hot short..................................................................................... 32
Failure code [DW7BKY] Fan reverse solenoid circuit: Hot short...................................................................34
Failure code [DW7BKZ] Fan reverse solenoid circuit: Disconnection/Ground fault ...................................... 36
370 Troubleshooting by failure code (Display of code), Part 7 SEN03847-00
Failure code [DX16KA] Fan EPC solenoid: Disconnection ...........................................................................2
Failure code [DX16KB] Fan EPC solenoid: Ground fault.............................................................................. 3
Failure code [DX16KY] Fan EPC solenoid: Hot short ................................................................................... 4
Failure code [DX19KA] Motor 1 solenoid: Disconnection.............................................................................. 6
Failure code [DX19KB] Motor 1 solenoid: Ground fault................................................................................. 8
Failure code [DX19KY] Motor 1 solenoid: Hot short...................................................................................... 10
Failure code [DX20KA] Clutch EPC solenoid: Disconnection ....................................................................... 12
Failure code [DX20KB] Clutch EPC solenoid: Ground fault.......................................................................... 14
Failure code [DX20KY] Clutch EPC solenoid: Hot short ............................................................................... 16
Failure code [DXH7KB] Reverse solenoid: Ground fault............................................................................... 18
Failure code [DXH7KZ] Reverse solenoid: Disconnection/Hot short............................................................. 20
Failure code [DXH8KB] Forward solenoid: Ground fault............................................................................... 22
Failure code [DXH8KZ] Forward solenoid: Disconnection/Hot short............................................................. 24
Failure code [J141N1] Steering pump: Overrun alarm.................................................................................. 26
Failure code [M100N1] HST pump: Overrun alarm....................................................................................... 26
Failure code [M400N1] Motor 1: Overrun alarm............................................................................................ 27
400 Troubleshooting of electrical system (E-mode) SEN03848-00
E-1 Engine does not start.............................................................................................................................. 3
E-2. Preheater does not operate normally..................................................................................................... 10
E-3 Defective boom kick-out function and cancellation................................................................................. 14
E-4 Defective bucket positioner function and cancellation............................................................................ 18
E-5 Defective lift arm FLOATING holding function and cancellation ............................................................. 22
E-6 Travel direction selection system does not function................................................................................ 26
E-7 Wiper does not operate........................................................................................................................... 30
E-8 Windshield washer does not operate...................................................................................................... 34
E-9 Headlamp, clearance lamp and tail lamp do not light up or go off.......................................................... 38
E-10 Working lamp does not light up or go off............................................................................................... 46
E-11 Turn signal lamp and hazard lamp do not light up or go off.................................................................. 51
E-12 Brake lamp does not light or it keeps lighting up .................................................................................. 58
E-13 Backup lamp does not light or it keeps lighting up................................................................................ 60
E-14 Backup alarm does not sound or it keeps sounding............................................................................. 63
E-15 Horn does not sound or it keeps sounding ........................................................................................... 66