WA470-7 Komatsu Service Manual PDF Download

SEN06006-17

WHEEL LOADER

WA470 -7 SERIAL NUMBERS

10001

and up

00 Index and foreword

WA470-7

00-1

Index

00 Index and foreword

Index 00 Index and foreword ................................................................................................................................... 00-1 Foreword, safety and general information ............................................................................................. 00-19 Important safety notice................................................................................................................... 00-19 How to read the shop manual ........................................................................................................ 00-26 Explanation of terms for maintenance standard ............................................................................. 00-28 Handling equipment of fuel system devices ................................................................................... 00-30 Handling of intake system parts ..................................................................................................... 00-31 Handling of hydraulic equipment .................................................................................................... 00-32 Method of disconnecting and connecting of push-pull type coupler ................................................ 00-34 Handling of electrical equipment .................................................................................................... 00-37 How to read electric wire code ....................................................................................................... 00-45 Precautions when performing operation ......................................................................................... 00-48 Practical use of KOMTRAX ............................................................................................................ 00-53 Standard tightening torque table .................................................................................................... 00-54 List of abbreviation ......................................................................................................................... 00-60 Conversion table ............................................................................................................................ 00-65 01 Specification.............................................................................................................................................. 01-1 Table of contents..................................................................................................................................... 01-2 Specifications.......................................................................................................................................... 01-3 Specification drawing ....................................................................................................................... 01-3 Specifications................................................................................................................................... 01-5 Weight table ................................................................................................................................... 01-10 Table of fuel, coolant, and lubricants .............................................................................................. 01-12 10 Structure and function ............................................................................................................................... 10-1 Table of contents..................................................................................................................................... 10-2 Engine and cooling system ..................................................................................................................... 10-4 Engine related parts ......................................................................................................................... 10-4 KVGT ............................................................................................................................................... 10-6 EGR system piping drawing ........................................................................................................... 10-12 EGR system circuit diagram........................................................................................................... 10-14 EGR valve...................................................................................................................................... 10-15 EGR cooler .................................................................................................................................... 10-17 KCCV layout drawing ..................................................................................................................... 10-19 KCCV ventilator ............................................................................................................................. 10-21 KDPF ............................................................................................................................................. 10-23 Cooling system .............................................................................................................................. 10-27 Cooling fan pump........................................................................................................................... 10-30 Cooling fan motor........................................................................................................................... 10-39 Power train............................................................................................................................................ 10-46 Power train system......................................................................................................................... 10-46 Drive shaft...................................................................................................................................... 10-49 Power train piping drawing ............................................................................................................. 10-50 Transmission control ...................................................................................................................... 10-51 Torque converter ............................................................................................................................ 10-54 Transmission.................................................................................................................................. 10-59 Transmission control valve ............................................................................................................. 10-78 Forward and reverse clutch ECMV and 1st and 2nd clutch ECMV ................................................. 10-81 3rd, 4th clutch ECMV ..................................................................................................................... 10-88 Lockup clutch ECMV...................................................................................................................... 10-95 Main relief and torque converter relief valve ................................................................................... 10-99 Axle...............................................................................................................................................10-101 Differential.....................................................................................................................................10-103 Final drive .....................................................................................................................................10-113 Steering system ...................................................................................................................................10-115 Layout of steering parts.................................................................................................................10-115 Steering column ............................................................................................................................10-116 00-2

WA470-7

00 Index and foreword

Index

Joystick steering lever linkage.......................................................................................................10-117 Steering pump...............................................................................................................................10-118 Steering valve ...............................................................................................................................10-130 Orbit-roll valve...............................................................................................................................10-144 Stop valve .....................................................................................................................................10-150 Emergency steering motor ............................................................................................................10-151 Emergency steering pump ............................................................................................................10-152 Brake system .......................................................................................................................................10-153 Layout of brake parts ....................................................................................................................10-153 Charge valve.................................................................................................................................10-155 Brake valve ...................................................................................................................................10-161 Slack adjuster ...............................................................................................................................10-165 Accumulator (for brake).................................................................................................................10-168 Brake ............................................................................................................................................10-169 Parking brake control ....................................................................................................................10-172 Parking brake................................................................................................................................10-173 Parking brake solenoid valve ........................................................................................................10-174 Parking brake emergency release valve........................................................................................10-177 Undercarriage and frame .....................................................................................................................10-178 Axle mount and center hinge pin ...................................................................................................10-178 Tire................................................................................................................................................10-179 Hydraulic system..................................................................................................................................10-181 Hydraulic component layout ..........................................................................................................10-181 Work equipment control ................................................................................................................10-183 Hydraulic tank ...............................................................................................................................10-185 Double type gear pump.................................................................................................................10-188 Work equipment pump ..................................................................................................................10-189 Control valve .................................................................................................................................10-210 CLSS ............................................................................................................................................10-219 Hydraulic circuit diagram and names of valves..............................................................................10-223 Accumulator charge valve .............................................................................................................10-234 Work equipment lock solenoid valve .............................................................................................10-238 Accumulator (for PPC circuit) ........................................................................................................10-239 Accumulator (for ECSS) ................................................................................................................10-240 Work equipment ...................................................................................................................................10-241 Work equipment linkage................................................................................................................10-241 Bucket...........................................................................................................................................10-242 Bucket positioner and boom positioner .........................................................................................10-243 Cab and its attachments ......................................................................................................................10-244 ROPS cab.....................................................................................................................................10-244 Electrical system ..................................................................................................................................10-245 Engine control system...................................................................................................................10-245 Preheating system ........................................................................................................................10-247 Engine power mode selector circuit...............................................................................................10-249 Engine output limit function ...........................................................................................................10-250 Automatic warm-up function..........................................................................................................10-251 Parking brake control system ........................................................................................................10-252 System operating lamp function ....................................................................................................10-254 Battery disconnect switch function ................................................................................................10-256 Transmission controller system .....................................................................................................10-258 Work equipment control system ....................................................................................................10-283 Machine monitor system ...............................................................................................................10-302 Rear view monitor system .............................................................................................................10-325 KOMTRAX system ........................................................................................................................10-328 System component parts ..............................................................................................................10-331 Sensor ..........................................................................................................................................10-362 20 STANDARD VALUE TABLE ...................................................................................................................... 20-1 Table of contents..................................................................................................................................... 20-2 WA470-7

00-3

Index

00 Index and foreword

Standard service value table ................................................................................................................... 20-3 Standard value table for engine ....................................................................................................... 20-3 Standard value table for machine..................................................................................................... 20-5 Standard value table for electrical system ...................................................................................... 20-21 30 TESTING AND ADJUSTING ..................................................................................................................... 30-1 Table of contents..................................................................................................................................... 30-2 Precautions before work ...................................................................................................................... 30-3-1 Related information on testing and adjusting........................................................................................... 30-4 Tools for testing and adjusting.......................................................................................................... 30-4 Sketch of tools for testing and adjusting ........................................................................................... 30-8 Engine and cooling system ................................................................................................................... 30-10 Testing engine speed ..................................................................................................................... 30-10 Testing boost pressure ................................................................................................................... 30-12 Testing exhaust gas color............................................................................................................... 30-14 Test mass air flow and temperature sensor ................................................................................ 30-15-1 Testing and adjusting valve clearance ............................................................................................ 30-16 Testing compression pressure........................................................................................................ 30-18 Testing blowby pressure................................................................................................................. 30-22 Testing engine oil pressure............................................................................................................. 30-24 Testing EGR valve and KVGT oil pressures ................................................................................... 30-25 Testing fuel pressure ...................................................................................................................... 30-26 Testing fuel return rate and leakage ............................................................................................... 30-27 Bleeding air from fuel system ......................................................................................................... 30-31 Testing fuel circuit for leakage ........................................................................................................ 30-33 Handling cylinder cutout mode operation ....................................................................................... 30-34 Handling no-injection cranking operation........................................................................................ 30-35 Testing of KDPF and muffler stack for looseness and damage....................................................... 30-36 Testing of installed condition of cylinder heads and manifolds........................................................ 30-37 Testing engine piping for damage and looseness........................................................................... 30-38 Testing and adjusting air conditioner compressor belt tension........................................................ 30-39 Testing and adjusting alternator belt tension .................................................................................. 30-41 Procedures for cleaning fuel doser................................................................................................. 30-43 Writing compensation values at replacement of injector and engine controller ............................... 30-46 Writing compensation amount for soot accumulation caused by ash on engine controller.............. 30-50 Power train............................................................................................................................................ 30-52 Adjusting transmission output speed sensor .................................................................................. 30-52 Adjusting transmission input speed sensor .................................................................................... 30-53 Flushing procedure for torque converter and transmission hydraulic circuit.................................... 30-54 Retrieval of disabled machine due to transmission valve failure ..................................................... 30-56 Testing oil leakage from axle final drive .......................................................................................... 30-58 Testing drive shaft for looseness, backlash, and damage............................................................... 30-59 Testing and adjusting power train oil pressure................................................................................ 30-60 Steering system .................................................................................................................................... 30-75 Testing directional lever.................................................................................................................. 30-75 Testing steering wheel.................................................................................................................... 30-76 Testing work equipment control lever ............................................................................................. 30-78 Testing and adjusting steering circuit oil pressure .......................................................................... 30-80 Bleeding air from steering cylinder circuit. ...................................................................................... 30-83 Testing and adjusting steering stopper valve .................................................................................. 30-84 Brake system ........................................................................................................................................ 30-85 Testing brake pedal ........................................................................................................................ 30-85 Testing and adjusting brake pedal linkage...................................................................................... 30-86 Testing braking performance .......................................................................................................... 30-87 Testing and adjusting of accumulator charge pressure................................................................... 30-88 Testing of brake accumulator nitrogen gas pressure and procedure for charging brake accumulator with nitrogen gas................................................................................................................................ 30-90 Testing wheel brake oil pressure .................................................................................................... 30-94 Testing lowering of wheel brake pressure....................................................................................... 30-96 Testing wear of wheel brake disc.................................................................................................... 30-98 00-4

WA470-7

This is the sample of the manual Click on the download link for complete manual

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00 Index and foreword

Index

Bleeding air from wheel brake circuit.............................................................................................. 30-99 Releasing remaining pressure in brake accumulator circuit...........................................................30-101 Testing parking brake performance ...............................................................................................30-102 Testing parking brake oil pressure.................................................................................................30-103 Testing wear of parking brake disc ................................................................................................30-104 Method of releasing parking brake manually .................................................................................30-105 Hydraulic system..................................................................................................................................30-107 Testing cooling fan speed..............................................................................................................30-107 Testing cooling fan pump circuit oil pressure .................................................................................30-108 Bleeding air from hydraulic fan circuit............................................................................................30-110 Testing and adjusting work equipment EPC oil pressure ...............................................................30-112 Testing and adjusting work equipment oil pressure .......................................................................30-115 Bleeding air from work equipment circuit.......................................................................................30-119 Releasing remaining pressure from work equipment circuit...........................................................30-120 Testing of ECSS accumulator nitrogen gas pressure and procedure for charging accumulator with nitrogen gas .....................................................................................................................................30-121 Work equipment ...................................................................................................................................30-125 Testing and adjusting bucket position detection lever. ...................................................................30-125 Testing and adjusting boom position detection lever .....................................................................30-126 Electrical system ..................................................................................................................................30-127 Adjusting replaced, reassembled or added sensor, controller, etc. with machine monitor..............30-127 Special functions of machine monitor ............................................................................................30-129 Adjusting rearview camera angle ..................................................................................................30-218 Handling voltage circuit of engine controller ..................................................................................30-219 Handling battery disconnect switch ...............................................................................................30-220 Testing diodes ...............................................................................................................................30-221 Pm clinic ..............................................................................................................................................30-222 Pm Clinic service ..........................................................................................................................30-222 Check sheet ..................................................................................................................................30-223 40 Troubleshooting ........................................................................................................................................ 40-1 Table of contents..................................................................................................................................... 40-2 Precautions before work .................................................................................................................... 40-11-1 Related information on troubleshooting ................................................................................................. 40-12 Troubleshooting points ................................................................................................................... 40-12 Sequence of events in troubleshooting .......................................................................................... 40-14 Check before troubleshooting ........................................................................................................ 40-16 Inspection procedure before troubleshooting ................................................................................. 40-18 Preparation work for troubleshooting of electrical system............................................................... 40-35 Classification and procedures for troubleshooting .......................................................................... 40-41 Symptom and troubleshooting numbers ......................................................................................... 40-44 Information in troubleshooting table ............................................................................................... 40-47 Connector list and layout................................................................................................................ 40-49 Connector contact identification ....................................................................................................40-188 T-branch box and T-branch adapter table......................................................................................40-227 Fuse location table ........................................................................................................................40-232 Precautions for KDPF (KCSF and KDOC) Cleaning and Replacement .........................................40-235 Precautions when performing troubleshooting of machine monitor................................................40-238 Processing procedure of harness checker for troubleshooting of machine monitor LCD unit.........40-240 Preparation of dummy temperature sensor (for KDOC and KDPF temperature sensors) ..............40-245 Preparation of short circuit electrical connector (for failure codes [CA1883] and [CA3135]) ..........40-246 Failure codes table........................................................................................................................40-247 Troubleshooting by failure code (display of code).................................................................................40-262 Failure code [1500L0] ...................................................................................................................40-262 Failure code [15SAL1]...................................................................................................................40-263 Failure code [15SALH] ..................................................................................................................40-266 Failure code [15SBL1]...................................................................................................................40-270 Failure code [15SBLH] ..................................................................................................................40-273 Failure code [15SEL1]...................................................................................................................40-277 WA470-7

00-5

Index

00 Index and foreword

Failure code [15SELH] ..................................................................................................................40-279 Failure code [15SFL1]...................................................................................................................40-282 Failure code [15SFLH] ..................................................................................................................40-285 Failure code [15SGL1] ..................................................................................................................40-288 Failure code [15SGLH]..................................................................................................................40-291 Failure code [15SHL1] ..................................................................................................................40-294 Failure code [15SHLH]..................................................................................................................40-297 Failure code [2F00MA]..................................................................................................................40-300 Failure code [2G42ZG]..................................................................................................................40-307 Failure code [2G43ZG]..................................................................................................................40-311 Failure code [879AKA] ..................................................................................................................40-315 Failure code [879AKB] ..................................................................................................................40-316 Failure code [879BKA] ..................................................................................................................40-317 Failure code [879BKB] ..................................................................................................................40-318 Failure code [879CKA] ..................................................................................................................40-319 Failure code [879CKB] ..................................................................................................................40-320 Failure code [879DKZ] ..................................................................................................................40-321 Failure code [879EMC] .................................................................................................................40-322 Failure code [879FMC]..................................................................................................................40-323 Failure code [989A00] ...................................................................................................................40-324 Failure code [989L00] ...................................................................................................................40-326 Failure code [989M00] ..................................................................................................................40-327 Failure code [989N00]...................................................................................................................40-328 Failure code [A1U0N3]..................................................................................................................40-329 Failure code [A1U0N4]..................................................................................................................40-332 Failure code [AA10NX]..................................................................................................................40-335 Failure code [AB00KE]..................................................................................................................40-338 Failure code [AB00KY]..................................................................................................................40-340 Failure code [B@BAZG]................................................................................................................40-342 Failure code [B@BAZK] ................................................................................................................40-343 Failure code [B@BCNS] ...............................................................................................................40-346 Failure code [B@BCZK]................................................................................................................40-347 Failure code [B@C7NS]................................................................................................................40-350 Failure code [B@CENS] ...............................................................................................................40-353 Failure code [B@HANS] ...............................................................................................................40-355 Failure code [CA115].....................................................................................................................40-357 Failure code [CA122] ....................................................................................................................40-359 Failure code [CA123] ....................................................................................................................40-363 Failure code [CA131] ....................................................................................................................40-367 Failure code [CA132] ....................................................................................................................40-370 Failure code [CA135] ....................................................................................................................40-374 Failure code [CA141] ....................................................................................................................40-378 Failure code [CA144] ....................................................................................................................40-382 Failure code [CA145] ....................................................................................................................40-385 Failure code [CA153] ....................................................................................................................40-388 Failure code [CA154] ....................................................................................................................40-391 Failure code [CA187] ....................................................................................................................40-394 Failure code [CA221] ....................................................................................................................40-397 Failure code [CA222] ....................................................................................................................40-401 Failure code [CA227] ....................................................................................................................40-405 Failure code [CA234] ....................................................................................................................40-406 Failure code [CA238] ....................................................................................................................40-408 Failure code [CA239] ....................................................................................................................40-410 Failure code [CA271] ....................................................................................................................40-412 Failure code [CA272] ....................................................................................................................40-415 Failure code [CA273] ....................................................................................................................40-418 Failure code [CA274] ....................................................................................................................40-421 Failure code [CA322] ....................................................................................................................40-424 00-6

WA470-7

00 Index and foreword

Index

Failure code [CA323] ....................................................................................................................40-428 Failure code [CA324] ....................................................................................................................40-432 Failure code [CA325] ....................................................................................................................40-436 Failure code [CA331] ....................................................................................................................40-440 Failure code [CA332] ....................................................................................................................40-444 Failure code [CA343] ....................................................................................................................40-448 Failure code [CA351] ....................................................................................................................40-449 Failure code [CA352] ....................................................................................................................40-450 Failure code [CA356] ....................................................................................................................40-453 Failure code [CA357] ....................................................................................................................40-456 Failure code [CA386] ....................................................................................................................40-460 Failure code [CA431] ....................................................................................................................40-461 Failure code [CA432] ....................................................................................................................40-466 Failure code [CA441] ....................................................................................................................40-471 Failure code [CA442] ....................................................................................................................40-475 Failure code [CA449] ....................................................................................................................40-476 Failure code [CA451] ....................................................................................................................40-477 Failure code [CA452] ....................................................................................................................40-480 Failure code [CA515] ....................................................................................................................40-483 Failure code [CA516] ....................................................................................................................40-486 Failure code [CA553] ....................................................................................................................40-489 Failure code [CA555] ....................................................................................................................40-492 Failure code [CA556] ....................................................................................................................40-494 Failure code [CA559] ....................................................................................................................40-496 Failure code [CA595] ....................................................................................................................40-503 Failure code [CA687] ....................................................................................................................40-504 Failure code [CA689] ....................................................................................................................40-508 Failure code [CA691] ....................................................................................................................40-512 Failure code [CA692] ....................................................................................................................40-516 Failure code [CA697] ....................................................................................................................40-520 Failure code [CA698] ....................................................................................................................40-521 Failure code [CA731] ....................................................................................................................40-522 Failure code [CA778] ....................................................................................................................40-523 Failure code [CA1117] ...................................................................................................................40-528 Failure code [CA1664] ..................................................................................................................40-530 Failure code [CA1691] ..................................................................................................................40-535 Failure code [CA1695] ..................................................................................................................40-540 Failure code [CA1696] ..................................................................................................................40-543 Failure code [CA1843] ..................................................................................................................40-546 Failure code [CA1844] ..................................................................................................................40-550 Failure code [CA1879] ..................................................................................................................40-554 Failure code [CA1881] ..................................................................................................................40-557 Failure code [CA1883] ..................................................................................................................40-561 Failure code [CA1921] ..................................................................................................................40-568 Failure code [CA1922] ..................................................................................................................40-571 Failure code [CA1923] ..................................................................................................................40-578 Failure code [CA1924] ..................................................................................................................40-581 Failure code [CA1925] ..................................................................................................................40-585 Failure code [CA1927] ..................................................................................................................40-588 Failure code [CA1928] ..................................................................................................................40-591 Failure code [CA1942] ..................................................................................................................40-594 Failure code [CA1963] ..................................................................................................................40-596 Failure code [CA1977] ..................................................................................................................40-603 Failure code [CA1993] ..................................................................................................................40-606 Failure code [CA2185] ..................................................................................................................40-610 Failure code [CA2186] ..................................................................................................................40-613 Failure code [CA2249] ..................................................................................................................40-616 Failure code [CA2265] ..................................................................................................................40-617 WA470-7

00-7

Index

00 Index and foreword

Failure code [CA2266] ..................................................................................................................40-620 Failure code [CA2271] ..................................................................................................................40-624 Failure code [CA2272] ..................................................................................................................40-628 Failure code [CA2349] ..................................................................................................................40-632 Failure code [CA2353] ..................................................................................................................40-635 Failure code [CA2357] ..................................................................................................................40-639 Failure code [CA2381] ..................................................................................................................40-643 Failure code [CA2382] ..................................................................................................................40-647 Failure code [CA2383] ..................................................................................................................40-651 Failure code [CA2386] ..................................................................................................................40-654 Failure code [CA2387] ..................................................................................................................40-658 Failure code [CA2555] ..................................................................................................................40-662 Failure code [CA2556] ..................................................................................................................40-665 Failure code [CA2637] ..................................................................................................................40-668 Failure code [CA2639] ..................................................................................................................40-672 Failure code [CA2732] ..................................................................................................................40-676 Failure code [CA2733] ..................................................................................................................40-679 Failure code [CA2741] ..................................................................................................................40-682 Failure code [CA2765] ..................................................................................................................40-684 Failure code [CA2878] ..................................................................................................................40-685 Failure code [CA2881] ..................................................................................................................40-691 Failure code [CA3133] ..................................................................................................................40-700 Failure code [CA3134] ..................................................................................................................40-703 Failure code [CA3135] ..................................................................................................................40-706 Failure code [CA3167] ..................................................................................................................40-712 Failure code [CA3251] ..................................................................................................................40-718 Failure code [CA3253] ..................................................................................................................40-723 Failure code [CA3254] ..................................................................................................................40-728 Failure code [CA3255] ..................................................................................................................40-734 Failure code [CA3256] ..................................................................................................................40-740 Failure code [CA3311]...................................................................................................................40-745 Failure code [CA3312] ..................................................................................................................40-750 Failure code [CA3313] ..................................................................................................................40-756 Failure code [CA3314] ..................................................................................................................40-762 Failure code [CA3315] ..................................................................................................................40-768 Failure code [CA3316] ..................................................................................................................40-776 Failure code [CA3317] ..................................................................................................................40-782 Failure code [CA3318] ..................................................................................................................40-788 Failure code [CA3319] ..................................................................................................................40-797 Failure code [CA3321] ..................................................................................................................40-803 Failure code [CA3322] ..................................................................................................................40-809 Failure code [CA3419] ..................................................................................................................40-818 Failure code [CA3421] ..................................................................................................................40-820 Failure code [D150KA] ..................................................................................................................40-823 Failure code [D150KB] ..................................................................................................................40-826 Failure code [D150KY] ..................................................................................................................40-829 Failure code [D160KA] ..................................................................................................................40-832 Failure code [D160KB] ..................................................................................................................40-836 Failure code [D160KY] ..................................................................................................................40-840 Failure code [D191KA] ..................................................................................................................40-844 Failure code [D191KB] ..................................................................................................................40-847 Failure code [D191KY] ..................................................................................................................40-850 Failure code [D192KA] ..................................................................................................................40-853 Failure code [D192KB] ..................................................................................................................40-856 Failure code [D192KY] ..................................................................................................................40-859 Failure code [D193KA] ..................................................................................................................40-862 Failure code [D193KB] ..................................................................................................................40-865 Failure code [D193KY] ..................................................................................................................40-868 00-8

WA470-7

00 Index and foreword

Index

Failure code [D193MC] .................................................................................................................40-871 Failure code [D19JKZ] ..................................................................................................................40-874 Failure code [D1E6KA]..................................................................................................................40-877 Failure code [D1E6KB]..................................................................................................................40-880 Failure code [D1E6KY]..................................................................................................................40-883 Failure code [D5ZHKA] .................................................................................................................40-886 Failure code [D5ZHKB] .................................................................................................................40-889 Failure code [D5ZHKZ] .................................................................................................................40-892 Failure code [D5ZHL6] ..................................................................................................................40-895 Failure code [D811MC] .................................................................................................................40-897 Failure code [D862KA] ..................................................................................................................40-898 Failure code [D8ALKA]..................................................................................................................40-899 Failure code [D8ALKB]..................................................................................................................40-901 Failure code [D8AQK4] .................................................................................................................40-904 Failure code [D8AQKR].................................................................................................................40-905 Failure code [DAF0KT]..................................................................................................................40-909 Failure code [DAF0MB].................................................................................................................40-910 Failure code [DAF0MC].................................................................................................................40-911 Failure code [DAF3KK] .................................................................................................................40-912 Failure code [DAF8KB] .................................................................................................................40-916 Failure code [DAFDKB].................................................................................................................40-918 Failure code [DAFGMC] ................................................................................................................40-920 Failure code [DAFLKA] .................................................................................................................40-921 Failure code [DAFLKB] .................................................................................................................40-923 Failure code [DAFQKR] ................................................................................................................40-926 Failure code [DAQ0KK].................................................................................................................40-928 Failure code [DAQ0KT] .................................................................................................................40-932 Failure code [DAQ0MC] ................................................................................................................40-933 Failure code [DAQ1KA].................................................................................................................40-934 Failure code [DAQ2KK].................................................................................................................40-937 Failure code [DAQ4KB].................................................................................................................40-942 Failure code [DAQ9KQ] ................................................................................................................40-945 Failure code [DAQLKA].................................................................................................................40-947 Failure code [DAQLKB].................................................................................................................40-950 Failure code [DAQQKR] ................................................................................................................40-953 Failure code [DAQRKR] ................................................................................................................40-955 Failure code [DAQRMA]................................................................................................................40-958 Failure code [DAZ9KQ] .................................................................................................................40-960 Failure code [DAZQKR] ................................................................................................................40-961 Failure code [DB2QKR].................................................................................................................40-963 Failure code [DB2RKR].................................................................................................................40-972 Failure code [DB90KK]..................................................................................................................40-979 Failure code [DB90KT]..................................................................................................................40-983 Failure code [DB90MC].................................................................................................................40-984 Failure code [DB91KA]..................................................................................................................40-985 Failure code [DB92KK]..................................................................................................................40-988 Failure code [DB95KX]..................................................................................................................40-992 Failure code [DB96KX]..................................................................................................................40-998 Failure code [DB99KQ] ...............................................................................................................40-1004 Failure code [DB9LKA]................................................................................................................40-1006 Failure code [DB9LKB]................................................................................................................40-1008 Failure code [DB9QKR]...............................................................................................................40-1011 Failure code [DB9RKR]...............................................................................................................40-1013 Failure code [DB9RMA] ..............................................................................................................40-1015 Failure code [DBE5KX] ...............................................................................................................40-1017 Failure code [DBE6KX] ...............................................................................................................40-1020 Failure code [DD1ALD] ...............................................................................................................40-1022 Failure code [DDAAL6] ...............................................................................................................40-1027 WA470-7

00-9

Index

00 Index and foreword

Failure code [DDB6L4]................................................................................................................40-1030 Failure code [DDD1LD] ...............................................................................................................40-1034 Failure code [DDK3KA] ...............................................................................................................40-1039 Failure code [DDK3KB] ...............................................................................................................40-1047 Failure code [DDK4KA] ...............................................................................................................40-1054 Failure code [DDK4KB] ...............................................................................................................40-1058 Failure code [DDK5L4]................................................................................................................40-1062 Failure code [DDK6KA] ...............................................................................................................40-1065 Failure code [DDK6KB] ...............................................................................................................40-1068 Failure code [DDNRKY] ..............................................................................................................40-1071 Failure code [DDT0L4] ................................................................................................................40-1076 Failure code [DDT4LD] ...............................................................................................................40-1081 Failure code [DDT9LD] ...............................................................................................................40-1086 Failure code [DDW9LD] ..............................................................................................................40-1091 Failure code [DDWLLD] ..............................................................................................................40-1095 Failure code [DF10KA]................................................................................................................40-1099 Failure code [DF10KB]................................................................................................................40-1103 Failure code [DGF1KA] ...............................................................................................................40-1106 Failure code [DGF1KB] ............................................................................................................... 40-1110 Failure code [DGH2KX]............................................................................................................... 40-1112 Failure code [DGR2KB]............................................................................................................... 40-1116 Failure code [DGR2KZ]............................................................................................................... 40-1118 Failure code [DGT1KA] ...............................................................................................................40-1121 Failure code [DGT1KB] ...............................................................................................................40-1125 Failure code [DH21KA] ...............................................................................................................40-1128 Failure code [DH21KB] ...............................................................................................................40-1132 Failure code [DHA4KA] ...............................................................................................................40-1135 Failure code [DHPCKX] ..............................................................................................................40-1138 Failure code [DHPDKX] ..............................................................................................................40-1142 Failure code [DHT1KX] ...............................................................................................................40-1146 Failure code [DHT5KX] ...............................................................................................................40-1149 Failure code [DHT7KX] ...............................................................................................................40-1152 Failure code [DHT8KA] ...............................................................................................................40-1155 Failure code [DHT8KB] ...............................................................................................................40-1158 Failure code [DHT8ZG] ...............................................................................................................40-1161 Failure code [DHUDKA] ..............................................................................................................40-1162 Failure code [DHUDKB] ..............................................................................................................40-1166 Failure code [DJF1KA] ................................................................................................................40-1169 Failure code [DK55KA]................................................................................................................40-1172 Failure code [DK55KY]................................................................................................................40-1176 Failure code [DK55L5] ................................................................................................................40-1179 Failure code [DK59KA]................................................................................................................40-1181 Failure code [DK59KY]................................................................................................................40-1188 Failure code [DK59L8] ................................................................................................................40-1195 Failure code [DK5AKA] ...............................................................................................................40-1206 Failure code [DK5AKY] ...............................................................................................................40-1213 Failure code [DK5BKA] ...............................................................................................................40-1220 Failure code [DK5BKY] ...............................................................................................................40-1227 Failure code [DK5BL8] ................................................................................................................40-1234 Failure code [DK5CKA] ...............................................................................................................40-1243 Failure code [DK5CKY] ...............................................................................................................40-1250 Failure code [DK5DKA] ...............................................................................................................40-1257 Failure code [DK5DKY] ...............................................................................................................40-1264 Failure code [DK5DL8]................................................................................................................40-1271 Failure code [DK5EKA] ...............................................................................................................40-1281 Failure code [DK5EKY] ...............................................................................................................40-1288 Failure code [DK5FKA] ...............................................................................................................40-1295 Failure code [DK5FKY] ...............................................................................................................40-1299 00-10

WA470-7

00 Index and foreword

Index

Failure code [DK5FL8] ................................................................................................................40-1303 Failure code [DK5GKA]...............................................................................................................40-1307 Failure code [DK5GKY]...............................................................................................................40-1311 Failure code [DKA0KA] ...............................................................................................................40-1315 Failure code [DKA0KY] ...............................................................................................................40-1319 Failure code [DKA0L0] ................................................................................................................40-1322 Failure code [DKA1KA] ...............................................................................................................40-1325 Failure code [DKA1KY] ...............................................................................................................40-1329 Failure code [DLF1KA]................................................................................................................40-1332 Failure code [DLF1LC] ................................................................................................................40-1335 Failure code [DLM3KA] ...............................................................................................................40-1338 Failure code [DLM3LC] ...............................................................................................................40-1341 Failure code [DLT3KA] ................................................................................................................40-1344 Failure code [DLT3LC] ................................................................................................................40-1347 Failure code [DPQ1KR]...............................................................................................................40-1350 Failure code [DPQ2KR]...............................................................................................................40-1355 Failure code [DPQ3KR]...............................................................................................................40-1360 Failure code [DSJ0KR]................................................................................................................40-1365 Failure code [DT20KB]................................................................................................................40-1369 Failure code [DT22KB]................................................................................................................40-1375 Failure code [DV00KB]................................................................................................................40-1381 Failure code [DW4PKA] ..............................................................................................................40-1383 Failure code [DW4PKB] ..............................................................................................................40-1386 Failure code [DW4PKY] ..............................................................................................................40-1389 Failure code [DW4QKA] ..............................................................................................................40-1392 Failure code [DW4QKB] ..............................................................................................................40-1395 Failure code [DW4QKY] ..............................................................................................................40-1398 Failure code [DW4RKA] ..............................................................................................................40-1401 Failure code [DW4RKB] ..............................................................................................................40-1404 Failure code [DW4RKY] ..............................................................................................................40-1407 Failure code [DW4SKA] ..............................................................................................................40-1410 Failure code [DW4SKB] ..............................................................................................................40-1413 Failure code [DW4SKY] ..............................................................................................................40-1416 Failure code [DW7BKA] ..............................................................................................................40-1419 Failure code [DW7BKB] ..............................................................................................................40-1422 Failure code [DW7BKY] ..............................................................................................................40-1425 Failure code [DWM1KA]..............................................................................................................40-1427 Failure code [DWM1KB]..............................................................................................................40-1430 Failure code [DWM1KY]..............................................................................................................40-1433 Failure code [DWN6KA] ..............................................................................................................40-1436 Failure code [DWN6KB] ..............................................................................................................40-1441 Failure code [DWN6KY] ..............................................................................................................40-1446 Failure code [DWN8KA] ..............................................................................................................40-1451 Failure code [DWN8KB] ..............................................................................................................40-1456 Failure code [DWN8KY] ..............................................................................................................40-1461 Failure code [DX16KA]................................................................................................................40-1466 Failure code [DX16KB]................................................................................................................40-1469 Failure code [DX16KY]................................................................................................................40-1472 Failure code [DXA1KA] ...............................................................................................................40-1475 Failure code [DXA1KB] ...............................................................................................................40-1478 Failure code [DXA1KY] ...............................................................................................................40-1481 Failure code [DXANKA]...............................................................................................................40-1484 Failure code [DXANKB]...............................................................................................................40-1487 Failure code [DXANKY]...............................................................................................................40-1490 Failure code [DXH1KA] ...............................................................................................................40-1493 Failure code [DXH1KB] ...............................................................................................................40-1496 Failure code [DXH1KY] ...............................................................................................................40-1499 Failure code [DXH4KA] ...............................................................................................................40-1502 WA470-7

00-11

Index

00 Index and foreword

Failure code [DXH4KB] ...............................................................................................................40-1505 Failure code [DXH4KY] ...............................................................................................................40-1508 Failure code [DXH5KA] ...............................................................................................................40-1511 Failure code [DXH5KB] ...............................................................................................................40-1514 Failure code [DXH5KY] ...............................................................................................................40-1517 Failure code [DXH6KA] ...............................................................................................................40-1520 Failure code [DXH6KB] ...............................................................................................................40-1523 Failure code [DXH6KY] ...............................................................................................................40-1526 Failure code [DXH7KA] ...............................................................................................................40-1529 Failure code [DXH7KB] ...............................................................................................................40-1532 Failure code [DXH7KY] ...............................................................................................................40-1535 Failure code [DXH8KA] ...............................................................................................................40-1538 Failure code [DXH8KB] ...............................................................................................................40-1541 Failure code [DXH8KY] ...............................................................................................................40-1544 Failure code [DXHHKA] ..............................................................................................................40-1547 Failure code [DXHHKB] ..............................................................................................................40-1550 Failure code [DXHHKY] ..............................................................................................................40-1553 Failure code [DXHJKA] ...............................................................................................................40-1556 Failure code [DXHJKB] ...............................................................................................................40-1560 Failure code [DXHJKY] ...............................................................................................................40-1563 Failure code [DXHKKA]...............................................................................................................40-1566 Failure code [DXHKKB]...............................................................................................................40-1570 Failure code [DXHKKY]...............................................................................................................40-1573 Failure code [DXHLKA] ...............................................................................................................40-1576 Failure code [DXHLKB] ...............................................................................................................40-1579 Failure code [DXHLKY] ...............................................................................................................40-1582 Failure code [DXHMKA] ..............................................................................................................40-1585 Failure code [DXHMKB] ..............................................................................................................40-1588 Failure code [DXHMKY] ..............................................................................................................40-1591 Failure code [DY30MA] ...............................................................................................................40-1594 Failure code [DY30MC]...............................................................................................................40-1601 Failure code [DY30ME] ...............................................................................................................40-1609 Failure code [LA00L3] .................................................................................................................40-1611 Troubleshooting of electrical system (E-mode)...................................................................................40-1612 E-1 The engine does not start .....................................................................................................40-1612 E-2 Manual preheating system does not work.............................................................................40-1618 E-3 Automatic preheating system does not work.........................................................................40-1621 E-4 While preheating is working, preheating monitor does not light up........................................40-1623 E-5 All of LCD unit, LED unit, and meter unit on machine monitor display nothing ......................40-1625 E-6 LCD unit on machine monitor displays nothing .....................................................................40-1628 E-7 Backlight of LCD unit on machine monitor is abnormal (Backlight goes out or flickers) ........40-1630 E-8 LCD on machine monitor does not display properly..............................................................40-1632 E-9 Meter unit display on machine monitor is abnormal ..............................................................40-1634 E-10 Night lighting lamp of meter unit on machine monitor is abnormal ......................................40-1637 E-11 Caution LED on machine monitor is abnormal ....................................................................40-1640 E-12 LED of switch panel on machine monitor is abnormal or switches does not operate properly .......... ................................................................................................................................................40-1642 E-13 2 switches operation of switch panel on machine monitor does not function.......................40-1644 E-14 Switch panel buzzer of machine monitor is abnormal .........................................................40-1647 E-15 Rear view monitor does not light up or backlight flickers.....................................................40-1649 E-16 Rear view monitor images are not displayed clearly ...........................................................40-1652 E-17 Rear view monitor brightness cannot be adjusted...............................................................40-1655 E-18 Night lighting lamp of rearview monitor is abnormal ............................................................40-1658 E-19 Some items of gauges and caution lamps on machine monitor are not displayed properly.40-1660 E-20 Parking brake indicator lamp does not light when the parking brake is set to ON (Parking) position ................................................................................................................................................40-1661 E-21 When brake accumulator oil pressure drops, the brake oil pressure caution lamp does not light ..... ................................................................................................................................................40-1665 00-12

WA470-7

00 Index and foreword

Index

E-22 Air cleaner clogging indicator lamp does not light up ..........................................................40-1667 E-23 Radiator coolant level caution lamp does not light up .........................................................40-1668 E-24 Indication of hydraulic oil temperature gauge does not increase, or hydraulic oil temperature caution lamp does not light............................................................................................................40-1670 E-25 Indication of torque converter oil temperature gauge does not increase, or torque converter oil temperature caution lamp does not light up .............................................................................40-1672 E-26 Fuel level gauge does not indicate correct level..................................................................40-1673 E-27 Seat belt caution lamp indication is abnormal. ....................................................................40-1675 E-28 Horn does not sound ..........................................................................................................40-1676 E-29 Horn does not stop sounding ..............................................................................................40-1679 E-30 Alarm buzzer does not sound .............................................................................................40-1681 E-31 When starting switch is in ON position, alarm buzzer does not stop sounding ....................40-1682 E-32 Kickdown does not work when kickdown switch is turned on ..............................................40-1683 E-33 Hold switch does not work when it is pressed .....................................................................40-1685 E-34 Parking brake does not work even if it is applied, or the brake drags when parking brake is released and FR drive is operated ..............................................................................................40-1687 E-35 Transmission cut-off mode is not selected or not released..................................................40-1690 E-36 Transmission cut-off setting cannot be released .................................................................40-1692 E-37 Directional selector (FNR) switch mode is not selected or not released ..............................40-1694 E-38 When operating engine power mode selector switch, engine mode selector function does not operate properly ..........................................................................................................................40-1696 E-39 Flow of loader pump does not increase from the minimum rate ..........................................40-1698 E-40 ECSS function cannot be selected or cannot be released ..................................................40-1699 E-41 None of headlamp, clearance lamp, and tail lamp light up ..................................................40-1701 E-42 Clearance lamp and tail lamp do not light up or go out .......................................................40-1704 E-43 Both “high and low beams” of headlamp do not light up or go out.......................................40-1708 E-44 “Low beam” of head lamp does not light up or go out .........................................................40-1713 E-45 “High beam” of headlamp does not light up or go out .........................................................40-1716 E-46 Front working lamp does not light up or go out ...................................................................40-1719 E-47 Rear working lamp does not light up or go out ....................................................................40-1723 E-48 All of turn signal lamps and hazard lamps do not light up or go out.....................................40-1726 E-49 Turn signal lamps do not light up or go out .........................................................................40-1730 E-50 Hazard lamp does not light up or go out .............................................................................40-1735 E-51 Brake lamp does not light or stays lighted...........................................................................40-1740 E-52 Backup lamp does not light up or does not go out ..............................................................40-1744 E-53 Backup buzzer does not sound or continues to sound ........................................................40-1749 E-54 Front wiper does not operate ..............................................................................................40-1752 E-55 Rear wiper does not operate...............................................................................................40-1755 E-56 Window washer does not operate.......................................................................................40-1757 E-57 Fuel feed pump does not operate or stop automatically......................................................40-1760 E-58 Fan does not rotate in reverse ............................................................................................40-1762 E-59 Fan remains rotated in reverse ...........................................................................................40-1763 E-60 KOMTRAX system does not operate normally....................................................................40-1764 Troubleshooting of hydraulic and mechanical systems (H-mode).......................................................40-1766 Information mentioned in troubleshooting table (H-mode) ...........................................................40-1766 System chart of hydraulic and mechanical systems ....................................................................40-1767 Failure mode and cause table .....................................................................................................40-1770 H-1 Machine does not start .........................................................................................................40-1777 H-2 Torque converter lockup pressure cannot be released (engine stalls)...................................40-1780 H-3 Torque converter lockup clutch does not engage..................................................................40-1781 H-4 Travel speed is slow, bucket thrust force is weak, gradability is low, or gear speed does not shift ..... ................................................................................................................................................40-1782 H-5 Large shock is made when machine moves off or gear is shifted .........................................40-1785 H-6 Large time lag is observed when machine starts and gear is shifted ....................................40-1787 H-7 Oil temperature of torque converter is high...........................................................................40-1789 H-8 Machine does not turn ..........................................................................................................40-1791 H-9 Turning response is poor ......................................................................................................40-1795 H-10 Steering wheel is heavy to turn...........................................................................................40-1799 WA470-7

00-13