Komatsu WA380-7 Wheel Loader Shop Manual SEN05650-13 PDF

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Komatsu WA380-7 Wheel Loader Shop Manual SEN05650-13  – PDF DOWNLOAD

FILE DETAILS:

Komatsu WA380-7 Wheel Loader Shop Manual SEN05650-13  – PDF DOWNLOAD

Language : English
Pages : 2388
Downloadable : Yes
File Type : PDF

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TABLE OF CONTENTS:

Komatsu WA380-7 Wheel Loader Shop Manual SEN05650-13  – PDF DOWNLOAD

• SERIAL NUMBERS 10001 and up

Cover 1
00 Index and foreword . 3
Index . 4
Foreword, safety and general information 20
Important safety notice . 20
How to read the shop manual . 27
Explanation of terms for maintenance standard . 29
Handling equipment of fuel system devices . 31
Handling of intake system parts . 32
Handling of hydraulic equipment . 33
Method of disconnecting and connecting of push-pull type coupler 35
Handling of electrical equipment 38
How to read electric wire code 46
Precautions when performing operation . 49
Practical use of KOMTRAX 54
Standard tightening torque table 55
List of abbreviation 61
Conversion table 66
01 Specification 71
Table of contents . 72
Specifications 73
Specification drawing . 73
Specification . 75
Weight table 81
Table of fuel, coolant and lubricants . 83
10 Structure and function . 85
Table of contents . 86
Engine and cooling system . 88
Engine related parts 88
KVGT 90
EGR system piping drawing . 97
EGR system circuit diagram 99
EGR valve . 101
EGR cooler 103
KCCV layout drawing . 104
KCCV ventilator . 106
KDPF 108
Cooling system 112
Cooling fan pump 115
Cooling fan motor . 124
Power train . 132
Power train system 132
Drive shaft . 135
Power train piping drawing 136
Transmission control 137
Torque converter 139
Transmission 144
Transmission control valve 163
Forward and reverse clutch ECMV and gear speed clutch ECMV 166
Lockup clutch ECMV 173
Main relief and torque converter relief valve . 177
Axle 179
Differential 183
Limited slip differential . 187
Final drive . 191
Steering system . 193
Layout of steering devices 193
Steering column . 194
Steering pump . 195
Steering valve 207
Orbit-roll valve 221
Stop valve 227
Emergency steering motor 228
Emergency steering pump . 229
Brake system 230
Layout of brake parts . 230
Charge valve 232
Brake valve . 238
Accumulator (for brake) . 242
Brake . 243
Parking brake control . 246
Parking brake . 247
Parking brake solenoid valve 248
Parking brake emergency release valve . 251
Undercarriage and frame . 252
Axle mount and center hinge pin . 252
Tire 253
Hydraulic system 255
Hydraulic component layout 255
Work equipment control 257
Hydraulic tank 259
Double type gear pump . 261
Work equipment pump . 262
Control valve . 274
CLSS 284
Hydraulic circuit diagram and name of valves 288
ECCS accumulator charge valve . 303
Stabilizer valve 307
Work equipment lock solenoid valve 312
Accumulator (for PPC circuit) . 313
ECSS accumulator 314
Work equipment 315
Work equipment linkage 315
Bucket 316
Bucket positioner and boom positioner . 317
Cab and its attachments . 318
ROPS cab 318
Electrical system . 319
Engine control system . 319
Preheating system . 321
Engine power mode selector circuit 323
Engine output limit function 324
Automatic warm-up function 325
Parking brake control system 326
System operating lamp function 328
Battery disconnect switch function 330
Transmission controller system 332
Work equipment control system . 367
Machine monitor system 388
Rear view monitor system 414
KOMTRAX system 417
System component parts 420
Sensor 454
20 Standard value tables 477
Table of contents . 478
Standard service value table 479
Standard value table for engine . 479
Standard value table for machine 481
30 Testing and adjusting 495
Table of contents . 496
Related information on testing and adjusting 498
Tools for testing and adjusting . 498
Sketch of tools for testing and adjusting . 503
Engine and cooling system . 504
Testing engine speed 504
Testing boost pressure 505
Testing exhaust gas temperature . 507
Testing exhaust gas color . 509
Testing mass air flow and temperaturesensor 511
Testing and adjusting valve clearance . 513
Testing compression pressure 515
Testing blowby pressure . 519
Testing engine oil pressure . 521
Testing EGR valve and KVGT oil pressure . 522
Testing fuel pressure . 523
Testing fuel delivery, return and leakage . 528
Bleeding air from fuel system . 534
Testing fuel circuit for leakage 536
Handling cylinder cutout mode operation . 537
Handling no-injection cranking operation 538
Testing of KDPF and muffler stack for looseness and damage 539
Testing of installed condition of cylinder heads and manifolds 540
Testing engine piping for damage and looseness 541
Testing and adjusting air conditioner compressor belt tension . 542
Check alternator belt, replace 543
Check auto-tensioner, replace . 545
Writing compensation amount for soot accumulation caused by ash on engine controller 547
Power train . 549
Adjusting transmission output speed sensor 549
Adjusting transmission input speed sensor . 550
Flushing procedure for torque converter and transmission hydraulic circuit 551
Retrieval of disabled machine due to transmission valve failure . 552
Testing oil leakage from axle final drive . 554
Testing drive shaft for looseness, backlash, and damage . 555
Testing and adjusting power train oil pressure 556
Steering system . 571
Testing directional lever . 571
Testing steering wheel 572
Testing work equipment control lever 574
Testing and adjusting steering circuit pressure . 576
Bleeding air from steering cylinder circuit. 579
Testing and adjusting steering stopper valve 580
Brake system 581
Testing brake pedal . 581
Testing and adjusting brake pedal linkage . 582
Testing braking performance . 583
Measuring accumulator nitrogen gas pressure and charging procedure for accumulator nitrogen gas . 584
Testing and adjusting of brake accumulator charge pressure 588
Testing wheel brake oil pressure 590
Testing lowering of wheel brake pressure 591
Testing wear of wheel brake disc 594
Bleeding air from wheel brake circuit . 595
Releasing remaining pressure in brake accumulator circuit . 596
Testing parking brake performance . 597
Testing parking brake oil pressure 598
Testing wear of parking brake disc 600
Method of releasing parking brake manually 601
Hydraulic system 602
Testing cooling fan speed . 602
Testing cooling fan pump circuit oil pressure . 603
Bleeding air from hydraulic fan circuit . 604
Testing and adjusting work equipment PPC oil pressure . 605
Testing and adjusting work equipment oil pressure . 608
Bleeding air from work equipment circuit 612
Releasing remaining pressure from work equipment circuit 613
Checking of E.C.S.S. accumulator nitrogen gas pressure and procedure for charging accumulator with nitrogen gas . 614
Work equipment 618
Testing and adjusting bucket position detection lever . 618
Testing and adjusting boom position detection lever . 619
Electrical system . 620
Adjusting replaced, reassembled or added sensor, controller, etc. with machine monitor 620
Special functions of machine monitor 622
Adjusting rearview camera angle . 716
Handling voltage circuit of engine controller . 717
Handling battery disconnect switch 718
Testing diodes 719
Pm clinic . 720
Pm Clinic service . 720
Check sheet . 721
40 Troubleshooting 727
Table of contents . 728
Related information on troubleshooting 738
Troubleshooting points 738
Sequence of events in troubleshooting . 740
Check before troubleshooting 742
Inspection procedure before troubleshooting . 744
Preparation work for troubleshooting of electrical system . 761
Classification and procedures for troubleshooting . 767
Symptom and troubleshooting numbers . 770
Information in troubleshooting table 773
Connector list and layout . 775
Procedure for troubleshooting wiring harness of pressure sensor system for open circuit . 791
Fuse location table . 794
Precautions for KDPF (KCSF and KDOC) Cleaning and Replacement . 797
Precautions when performing troubleshooting of machine monitor 800
Processing procedure of harness checker for troubleshooting of machine monitor LCD unit . 802
Preparation of dummy temperature sensor (for KDOC and KDPF temperature sensors) . 807
Preparation of short circuit electrical connector (for failure codes [CA1883] and [CA3135]) . 808
Failure codes table . 809
Troubleshooting by failure code (Display of code) . 823
Failure code [1500L0] Double Engagement of T/M Clutches . 823
Failure code [15SAL1] Release Trouble of ECMV (Forward) . 824
Failure code [15SALH] Malfunction of ECMV (Forward) . 826
Failure code [15SBL1] Release Trouble of ECMV (Reverse) . 828
Failure code [15SBLH] Malfunction of ECMV (Reverse) . 830
Failure code [15SEL1] Release Trouble of ECMV (1st) . 832
Failure code [15SELH] Malfunction of ECMV (1st) . 834
Failure code [15SFL1] Release Trouble of ECMV (2nd) . 836
Failure code [15SFLH] Malfunction of ECMV (2nd) . 838
Failure code [15SGL1] Release Trouble of ECMV (3rd) . 840
Failure code [15SGLH] Malfunction of ECMV (3rd) . 842
Failure code [15SHL1] Release Trouble of ECMV (4th) . 844
Failure code [15SHLH] Malfunction of ECMV (4th) . 846
Failure code [2F00MA] Failure of Parking Brake Circuit 848
Failure code [2G42ZG] Accumulator Oil Pressure Low (Front) 851
Failure code [2G43ZG] Accumulator Oil Pressure Low (Rear) . 853
Failure code [879AKA] A/C Inner Sensor Open Circuit . 855
Failure code [879AKB] A/C Inner Sensor Short Circuit 856
Failure code [879BKA] A/C Outer Sensor Open Circuit . 857
Failure code [879BKB] A/C Outer Sensor Short Circuit 858
Failure code [879CKA] Ventilating Sensor Open Circuit . 859
Failure code [879CKB] Ventilating Sensor Short Circuit 860
Failure code [879DKZ] Sunlight Sensor Open or Short Circuit . 861
Failure code [879EMC] Ventilation Damper Abnormality 862
Failure code [879FMC] Air Mix Damper Abnormality 863
Failure code [989A00] Engine Overrun Prevention Activated . 864
Failure code [989L00] Engine Controller Lock Caution 1 865
Failure code [989M00] Engine Controller Lock Caution 2 866
Failure code [989N00] Engine Controller Lock Caution 3 867
Failure code [A1U0N3] HC Desorb Request 1 . 868
Failure code [A1U0N4] HC Desorb Request 2 . 870
Failure code [AA10NX] Air Cleaner Clogging 872
Failure code [AB00KE] Charge Voltage Low 874
Failure code [AB00KY] Hot Short of Alternator R Terminal 876
Failure code [B@BAZG] Eng Oil Press Low . 877
Failure code [B@BAZK] Engine Oil Level Low 878
Failure code [B@BCNS] Eng Water Overheat 879
Failure code [B@BCZK] Eng Water Level Low . 880
Failure code [B@C7NS] High Brake Oil Temp . 882
Failure code [B@CENS] T/C Oil Temp. Overheat 884
Failure code [B@HANS] HYD Oil Temp. Overheat 885
Failure code [CA115] Eng Ne and Bkup Speed Sens Error . 886
Failure code [CA122] Chg Air Press Sensor High Error 887
Failure code [CA123] Chg Air Press Sensor Low Error . 889
Failure code [CA131] Throttle Sensor High Error . 891
Failure code [CA132] Throttle Sensor Low Error 893
Failure code [CA144] Coolant Temp Sens High Error . 895
Failure code [CA145] Coolant Temp Sens Low Error 897
Failure code [CA153] Chg Air Temp Sensor High Error . 899
Failure code [CA154] Chg Air Temp Sensor Low Error 901
Failure code [CA187] Sensor 2 Supply Volt Low Error . 903
Failure code [CA221] Ambient Press Sensor High Error 905
Failure code [CA222] Ambient Press Sensor Low Error . 907
Failure code [CA227] Sensor 2 Supply Volt High Error 909
Failure code [CA234] Eng Overspeed 910
Failure code [CA238] Ne Speed Sensor Supply Volt Error 911
Failure code [CA239] Ne Speed Sens Supply Volt High Error . 912
Failure code [CA271] IMV/PCV1 Short Error . 913
Failure code [CA272] IMV/PCV1 Open Error 915
Failure code [CA295] Ambient Press Sens In Range Error 917
Failure code [CA322] Inj #1(L#1) Open/Short Error . 918
Failure code [CA323] Inj #5(L#5) Open/Short Error . 920
Failure code [CA324] Inj #3(L#3) Open/Short Error . 922
Failure code [CA325] Inj #6(L#6) Open/Short Error . 924
Failure code [CA331] Inj #2(L#2) Open/Short Error . 926
Failure code [CA332] Inj #4(L#4) Open/Short Error . 928
Failure code [CA343] ECM Critical Internal Failure 930
Failure code [CA351] Injectors Drive Circuit Error 931
Failure code [CA352] Sensor 1 Supply Volt Low Error . 932
Failure code [CA356] Mass Air Flow Sensor High Error 934
Failure code [CA357] Mass Air Flow Sensor Low Error . 936
Failure code [CA386] Sensor 1 Supply Volt High Error 938
Failure code [CA428] Water in Fuel Sensor High Error 939
Failure code [CA429] Water in Fuel Sensor Low Error . 941
Failure code [CA431] Idle Validation Sw Error . 943
Failure code [CA432] Idle Validation Process Error 946
Failure code [CA435] Eng Oil Press Sw Error . 949
Failure code [CA441] Battery Voltage Low Error 950
Failure code [CA442] Battery Voltage High Error . 952
Failure code [CA449] Rail Press Very High Error . 953
Failure code [CA451] Rail Press Sensor High Error . 954
Failure code [CA452] Rail Press Sensor Low Error 956
Failure code [CA488] Chg Air Temp High Torque Derate 958
Failure code [CA515] Rail Press Sens Sup Volt High Error 959
Failure code [CA516] Rail Press Sens Sup Volt Low Error . 961
Failure code [CA553] Rail Press High Error 963
Failure code [CA555] Crankcase Press High Error 1 . 964
Failure code [CA556] Crankcase Press High Error 2 . 965
Failure code [CA559] Rail Press Low Error . 966
Failure code [CA595] Turbo Speed High Error 2 . 968
Failure code [CA687] Turbo Speed Low Error 969
Failure code [CA689] Eng Ne Speed Sensor Error 971
Failure code [CA691] Intake Air Temp Sens High Error 973
Failure code [CA692] Intake Air Temp Sens Low Error . 975
Failure code [CA697] ECM Internal Temp Sensor High Error 977
Failure code [CA698] ECM Int Temp Sensor Low Error 978
Failure code [CA731] Eng Bkup Speed Sens Phase Error 979
Failure code [CA778] Eng Bkup Speed Sensor Error 981
Failure code [CA1117] Persistent Data Lost Error 986
Failure code [CA1664] KDOC Malfunction 987
Failure code [CA1691] Regeneration Ineffective 990
Failure code [CA1695] Sensor 5 Supply Volt High Error . 993
Failure code [CA1696] Sensor 5 Supply Volt Low Error 994
Failure code [CA1843] Crankcase Press Sens High Error . 996
Failure code [CA1844] Crankcase Press Sens Low Error 998
Failure code [CA1879] KDPF Delta P Sensor High Error 1000
Failure code [CA1881] KDPF Delta P Sensor Low Error .1002
Failure code [CA1883] KDPF Delta P Sens In Range Error 1004
Failure code [CA1921] KDPF Soot Load High Error 1 .1008
Failure code [CA1922] KDPF Soot Load High Error 2 .1011
Failure code [CA1942] Crankcase Press Sens In Range Error .1016
Failure code [CA1993] KDPF Delta Pressure Low Error .1017
Failure code [CA2185] Throt Sensor Sup Volt High Error 1020
Failure code [CA2186] Throt Sensor Sup Volt Low Error .1022
Failure code [CA2249] Rail Press Very Low Error .1024
Failure code [CA2271] EGR Valve Pos Sens High Error .1025
Failure code [CA2272] EGR Valve Pos Sens Low Error 1027
Failure code [CA2288] Turbo Speed High Error 1 1030
Failure code [CA2311] IMV Solenoid Error 1031
Failure code [CA2349] EGR Valve Solenoid Open Error .1032
Failure code [CA2353] EGR Valve Solenoid Short Error 1034
Failure code [CA2357] EGR Valve Servo Error .1036
Failure code [CA2373] Exhaust Manifold Press Sens High error 1037
Failure code [CA2374] Exhaust Manifold Press Sens Low error .1039
Failure code [CA2375] EGR Orifice Temp Sens High Error 1041
Failure code [CA2376] EGR Orifice Temp Sens Low Error .1043
Failure code [CA2381] KVGT Pos Sens High Error 1045
Failure code [CA2382] KVGT Pos Sens Low Error .1047
Failure code [CA2383] KVGT Solenoid Open Error 1050
Failure code [CA2386] KVGT Solenoid Short Error .1052
Failure code [CA2387] VGT Servo Error .1054
Failure code [CA2554] Exh Manifold Press Sens In Range Error 1057
Failure code [CA2555] Grid Htr Relay Volt Low Error .1060
Failure code [CA2556] Grid Htr Relay Volt High Error 1062
Failure code [CA2637] KDOC Face Plugging 1064
Failure code [CA2639] Manual Stationary Regeneration Request 1066
Failure code [CA2961] EGR Orifice Temp High Error 1 .1069
Failure code [CA2973] Chg Air Press Sensor In Range Error .1070
Failure code [CA3133] KDPF Outlet Press Sens High Error .1071
Failure code [CA3134] KDPF Outlet Press Sens Low Error 1073
Failure code [CA3135] KDPF Outlet Press Sens In Range Error .1075
Failure code [CA3251] KDOC Inlet Temp High Error 1079
Failure code [CA3253] KDOC Temp Error – Non Regeneration 1082
Failure code [CA3254] KDOC Outlet Temp High Error 1 .1085
Failure code [CA3255] KDPF Temp Error – Non Regeneration 1088
Failure code [CA3256] KDPF Outlet Temp High Error 1 .1091
Failure code [CA3311] KDOC Outlet Temp High Error 2 .1094
Failure code [CA3312] KDPF Outlet Temp High Error 2 .1098
Failure code [CA3313] KDOC Inlet Temp Sensor Low Error 1102
Failure code [CA3314] KDOC Inlet Temp Sens High Error .1105
Failure code [CA3315] KDOC Inlet Temp Sens In Range Error .1108
Failure code [CA3316] KDOC Outlet Temp Sens Low Error .1113
Failure code [CA3317] KDOC Outlet Temp Sens High Error 1116
Failure code [CA3318] KDOC Outlet Temp Sens In Range Error 1120
Failure code [CA3319] KDPF Outlet Temp Sens High Error 1125
Failure code [CA3321] KDPF Outlet Temp Sens Low Error .1129
Failure code [CA3322] KDPF Outlet Temp Sens In Range Error 1132
Failure code [CA3419] Mass Air Flow Sensor Sup Volt High Error 1136
Failure code [CA3421] Mass Air Flow Sensor Sup Volt Low Error .1138
Failure code [CA3741] Rail Press Valve Trip Error .1140
Failure code [D150KA] Disconnection of Emerg. Steering Relay 1141
Failure code [D150KB] Ground Fault of Emerg. Steering Relay .1143
Failure code [D150KY] Hot Short of Emergency Steering Relay .1145
Failure code [D160KA] Disconnection of Backup Lamp Relay Output .1147
Failure code [D160KB] Ground Fault of Backup Lamp Relay Output 1149
Failure code [D160KY] Hot Short of Backup Lamp Relay Output .1151
Failure code [D191KA] Disconnection of Neutral Output Relay .1153
Failure code [D191KB] Ground Fault of Neutral Output Relay 1156
Failure code [D191KY] Hot Short of Neutral Output Relay .1159
Failure code [D192KA] Disconnection of ECSS Solenoid 1161
Failure code [D192KB] Ground Fault of ECSS Solenoid .1163
Failure code [D192KY] Hot Short of ECSS Solenoid 1164
Failure code [D19JKZ] Personal Code Relay Abnormality .1165
Failure code [D1E6KA] Disconnection of Parking Brake Relay 1167
Failure code [D1E6KB] Ground Fault of Parking Brake Relay .1169
Failure code [D1E6KY] Hot Short of Parking Brake Relay 1171
Failure code [D5ZHKA] Failure of Key SW C Signal 1173
Failure code [D5ZHKB] Key SW C Signal Short Circuit .1175
Failure code [D5ZHKZ] Failure of Key SW C Signal 1177
Failure code [D5ZHL6] Disconnection of Key SW C .1179
Failure code [D811MC] KOMTRAX Error .1181
Failure code [D862KA] GPS Antenna Open Circuit 1182
Failure code [D8ALKA] Operating Lamp Open Circuit (KOMTRAX) .1183
Failure code [D8ALKB] Operating Lamp Short Circuit (KOMTRAX) 1185
Failure code [D8AQK4] CAN2 Discon (KOMTRAX) 2 .1187
Failure code [D8AQKR] CAN2 Discon (KOMTRAX) .1188
Failure code [DAF0KT] Abnormality of Non-volatile Memory (MON) 1189
Failure code [DAF0MB] Monitor ROM Abnormality .1190
Failure code [DAF0MC] Monitor Error .1191
Failure code [DAF3KK] Controller Power Source Low (MON) .1192
Failure code [DAF8KB] Camera Power Supply Short Circuit .1194
Failure code [DAFDKB] Monitor 12V Power Output Short Circuit 1195
Failure code [DAFGMC] GPS Module Error 1197
Failure code [DAFLKA] Operating Lamp Open Circuit (MON) .1198
Failure code [DAFLKB] Operating Lamp Short Circuit (MON) 1200
Failure code [DAFQKR] CAN2 Discon (Monitor) .1202
Failure code [DAQ0KK] Controller Power Source Low (T/M) .1203
Failure code [DAQ0KT] Abnormality of Non-volatile Memory (T/M) 1206
Failure code [DAQ0MC] T/M Con Error .1207
Failure code [DAQ1KA] Disconnection of Key SW ACC (T/M) .1208
Failure code [DAQ2KK] Solenoid Power Source Low (T/M) .1210
Failure code [DAQ4KB] Ground Fault of Sol. Self-Holding Relay .1213
Failure code [DAQ9KQ] Inconsistency of Model Selection (T/M) 1215
Failure code [DAQLKA] Operating Lamp Open Circuit (T/M) .1216
Failure code [DAQLKB] Operating Lamp Short Circuit (T/M) 1218
Failure code [DAQQKR] CAN2 Discon (Transmission Con) 1220
Failure code [DAQRKR] CAN1 Discon (Transmission Con) 1221
Failure code [DAQRMA] Inconsistency of Option Selection (T/M) .1222
Failure code [DAZ9KQ] A/C Model Selection Abnormality .1223
Failure code [DAZQKR] CAN2 Discon (Aircon ECU) 1224
Failure code [DB2QKR] CAN2 Discon (Engine Con) 1225
Failure code [DB2RKR] CAN1 Discon (Engine Con) 1230
Failure code [DB90KK] Drop in BBC Controller Main Power Source 1236
Failure code [DB90KT] Abnormality of Non-volatile Memory (BBC) 1238
Failure code [DB90MC] BBC Error .1239
Failure code [DB91KA] Disconnection of Key SW ACC (BBC) .1240
Failure code [DB92KK] Solenoid Power Source Low (BBC) .1242
Failure code [DB95KX] Failure of 5 V Power Source 1 .1244
Failure code [DB96KX] Failure of 5 V Power Source 2 .1248
Failure code [DB99KQ] Inconsistency of Model Selection (BBC) 1252
Failure code [DB9LKA] Operating Lamp Open Circuit (BBC) .1253
Failure code [DB9LKB] Operating Lamp Short Circuit (BBC) 1255
Failure code [DB9QKR] CAN2 Discon (Bucket Boom Con) .1257
Failure code [DB9RKR] CAN1 Discon (Bucket Boom Con) .1258
Failure code [DB9RMA] Inconsistency of Option Selection (BBC) .1259
Failure code [DBE5KX] Failure of 5V Power Source 1260
Failure code [DBE6KX] Failure of 24 V Power Source 1262
Failure code [DD1ALD] Ground Fault of Remote Positioner Set SW 1264
Failure code [DDAAL6] Discon Engine Shutdown Secondary Switch .1268
Failure code [DDB6L4] Neutral Signal Malfunction 1270
Failure code [DDD1LD] Failure of Bucket Positioner Set Switch .1273
Failure code [DDK3KA] FNR SW Input Signal Disconnection .1277
Failure code [DDK3KB] FNR SW Input Signal Short Circuit .1282
Failure code [DDK6KA] FNR Lever Input Signal Disconnection 1286
Failure code [DDK6KB] FNR Lever Input Signal Short Circuit 1289
Failure code [DDNRKY] Hot Short of Work Equipment Lock SW .1291
Failure code [DDT0L4] Failure of Shift Mode Select SW .1295
Failure code [DDT4LD] Ground Fault of T/M Cut Off Set SW Signal .1299
Failure code [DDT9LD] Ground Fault of T/M Cut Off SW Signal .1303
Failure code [DDW9LD] Ground Fault of Kickdown Switch .1307
Failure code [DDWLLD] Ground Fault of T/M Shift Hold SW .1311
Failure code [DF10KA] Disconnection of Shift Lever Input 1315
Failure code [DF10KB] Ground Fault of Shift Lever Input .1317
Failure code [DGF1KA] Disconnection of T/M Oil Temp. Sensor .1320
Failure code [DGF1KB] Ground Fault of T/M Oil Temp. Sensor 1322
Failure code [DGH2KX] Out of Range of HYD Oil Temp. Sensor 1324
Failure code [DGR2KB] Ground Fault of Brake Oil Temp. Sensor 1326
Failure code [DGR2KZ] Failure of Brake Oil Temp. Sensor .1327
Failure code [DGT1KA] Disconnection of T/C Oil Temp. Sensor .1329
Failure code [DGT1KB] Ground Fault of T/C Oil Temp. Sensor 1331
Failure code [DH21KA] Failure of Loader Pump Press. Sensor 1333
Failure code [DH21KB] Loader Pump Press. Sensor Short Circuit .1335
Failure code [DHA4KA] Failure of Air Cleaner Sensor Circuit .1337
Failure code [DHPCKX] Out of Range of Boom Bottom Press. Sensor .1339
Failure code [DHPDKX] Out of Range of Boom Head Press. Sensor .1341
Failure code [DHT1KX] Out of Range of T/M Cut Off Press. Sensor .1343
Failure code [DHT5KX] Out of Range of T/C Input Pressure Sensor .1345
Failure code [DHT7KX] Out of Range of T/C Output Pressure Sensor 1348
Failure code [DHT8KA] Failure of Steering Pump Press. Sensor 1350
Failure code [DHT8KB] Steering Pump Press. Sensor Short Circuit .1352
Failure code [DHT8ZG] Steering Oil Pressure Low .1354
Failure code [DHUDKA] Failure of Emrg. Steering Press. Sensor .1355
Failure code [DHUDKB] Emrg. Steering Press. S. Short Circuit 1357
Failure code [DJF1KA] Disconnection of Fuel Level Sensor 1359
Failure code [DK55KA] Failure of FNR Lever Potentio .1361
Failure code [DK55KY] Hot Short of FNR Lever Potentio Circuit .1364
Failure code [DK55L5] Failure of FNR Lever Potentio .1366
Failure code [DK59KA] Failure of Boom Lever Potentio (Main) .1367
Failure code [DK59KY] Hot Short of Boom Lever Potentio (Main) .1373
Failure code [DK59L8] Boom Lever Potentio (Main & Sub) Disagree .1378
Failure code [DK5AKA] Failure of Boom Lever Potentio (Sub) 1385
Failure code [DK5AKY] Hot Short of Boom Lever Potentio (Sub) 1391
Failure code [DK5BKA] Failure of Bucket Lever Potentio (Main) .1396
Failure code [DK5BKY] Hot Short of Bucket Lever Potentio (Main) .1401
Failure code [DK5BL8] Bucket Lever Potentio (Main&Sub) Disagree .1406
Failure code [DK5CKA] Failure of Bucket Lever Potentio (Sub) 1413
Failure code [DK5CKY] Hot Short of Bucket Lever Potentio (Sub) 1418
Failure code [DK5DKA] Failure of 3rd Lever Potentio (Main) 1423
Failure code [DK5DKY] Hot Short of 3rd Lever Potentio (Main) 1428
Failure code [DK5DL8] 3rd Lever Potentio (Main & Sub) Disagree 1432
Failure code [DK5EKA] Failure of 3rd Lever Potentio (Sub) .1438
Failure code [DK5EKY] Hot Short of 3rd Lever Potentio (Sub) .1443
Failure code [DK5KKA] Failure of 4th Lever Potentio (Main) 1447
Failure code [DK5KKY] Hot Short of 4th Lever Potentio (Main) 1452
Failure code [DK5KL8] 4th Lever Potentio (Main & Sub) Disagree 1456
Failure code [DK5LKA] Failure of 4th Lever Potentio (Sub) .1462
Failure code [DK5LKY] Hot Short of 4th Lever Potentio (Sub) .1467
Failure code [DKA0KA] Failure of Boom Angle Sensor 1471
Failure code [DKA0KY] Hot Short of Boom Angle Sensor Circuit 1473
Failure code [DKA0L0] Boom Angle Sensor Dislocation .1475
Failure code [DKA1KA] Failure of Bucket Angle Sensor 1477
Failure code [DKA1KY] Hot Short of Bucket Angle Sensor Circuit 1480
Failure code [DLF1KA] Disconnection of T/M Input Speed Sensor .1482
Failure code [DLF1LC] Failure of T/M Input Speed Sensor .1484
Failure code [DLM3KA] Disconnection of Radiator Fan Speed Sensor 1486
Failure code [DLM3LC] Failure of Radiator Fan Speed Sensor 1488
Failure code [DLT3KA] Disconnection of Output Speed Sens. (Main) 1490
Failure code [DLT3LC] Failure of Output Speed Sensor (Main) .1492
Failure code [DPQ1KR] LIN Discon (Switch Panel) .1494
Failure code [DPQ2KR] LIN Discon (LED Unit) .1497
Failure code [DPQ3KR] LIN Discon (Rear View Monitor) 1500
Failure code [DSJ0KR] CAN2 Discon (Meter Unit) 1503
Failure code [DT20KB] Ground Fault of T/M Cut Off Indicator .1505
Failure code [DT22KB] Ground Fault of Work Equip. Lock Indic. .1509
Failure code [DV00KB] Ground Fault of Buzzer Output .1513
Failure code [DW4PKA] Disconnection of Boom EPC Solenoid (Raise) 1515
Failure code [DW4PKB] Ground Fault of Boom EPC Solenoid (Raise) .1517
Failure code [DW4PKY] Hot Short of Boom EPC Solenoid (Raise) 1519
Failure code [DW4QKA] Disconnection of Boom EPC Solenoid (Lower) 1521
Failure code [DW4QKB] Ground Fault of Boom EPC Solenoid (Lower) .1523
Failure code [DW4QKY] Hot Short of Boom EPC Solenoid (Lower) 1525
Failure code [DW4RKA] Disconnection of Bucket EPC Sol. (Tilt) .1527
Failure code [DW4RKB] Ground Fault of Bucket EPC Solenoid (Tilt) 1529
Failure code [DW4RKY] Hot Short of Bucket EPC Solenoid (Tilt) .1531
Failure code [DW4SKA] Disconnection of Bucket EPC Sol. (Dump) .1533
Failure code [DW4SKB] Ground Fault of Bucket EPC Solenoid (Dump) 1535
Failure code [DW4SKY] Hot Short of Bucket EPC Solenoid (Dump) .1537
Failure code [DW7BKA] Disconnection of Fan Reverse Solenoid .1539
Failure code [DW7BKB] Ground Fault of Radiator Fan Rev. Sol. 1540
Failure code [DW7BKY] Hot Short of Radiator Fan Rev. Sol. .1542
Failure code [DWM1KA] Disconnection of Neutral Lock Solenoid 1543
Failure code [DWM1KB] Ground Fault of Neutral Lock Solenoid .1545
Failure code [DWM1KY] Hot Short of Neutral Lock Solenoid 1547
Failure code [DWN6KA] Disconnection of Detent Solenoid (Boom) .1549
Failure code [DWN6KB] Ground Fault of Detent Solenoid (Boom) 1553
Failure code [DWN6KY] Hot Short of Detent Solenoid (Boom) .1557
Failure code [DWN8KA] Disconnection of Detent Solenoid (Bucket) .1561
Failure code [DWN8KB] Ground Fault of Detent Solenoid (Bucket) 1565
Failure code [DWN8KY] Hot Short of Detent Solenoid (Bucket) .1569
Failure code [DX16KA] Disconnection of Rad. Fan Pump EPC Sol. .1573
Failure code [DX16KB] Ground Fault of Rad. Fan Pump EPC Sol. 1575
Failure code [DX16KY] Hot Short of Radiator Fan Pump EPC Sol. .1577
Failure code [DXA1KA] Disconnection of Loader Pump EPC Solenoid .1579
Failure code [DXA1KB] Ground Fault of Loader Pump EPC Solenoid 1581
Failure code [DXA1KY] Hot Short of Loader Pump EPC Solenoid .1583
Failure code [DXANKA] Disconnection of Steering Pump EPC Sol. .1585
Failure code [DXANKB] Ground Fault of Steering Pump EPC Solenoid 1587
Failure code [DXANKY] Hot Short of Steering Pump EPC Solenoid .1589
Failure code [DXH1KA] Disconnection of ECMV Solenoid (Lockup) .1590
Failure code [DXH1KB] Ground Fault of ECMV Solenoid (Lockup) 1592
Failure code [DXH1KY] Hot Short of ECMV Solenoid (Lockup) .1594
Failure code [DXH4KA] Disconnection of ECMV Solenoid (1st) 1596
Failure code [DXH4KB] Ground Fault of ECMV Solenoid (1st) .1598
Failure code [DXH4KY] Hot Short of ECMV Solenoid (1st) 1600
Failure code [DXH5KA] Disconnection of ECMV Solenoid (2nd) 1602
Failure code [DXH5KB] Ground Fault of ECMV Solenoid (2nd) .1604
Failure code [DXH5KY] Hot Short of ECMV Solenoid (2nd) 1606
Failure code [DXH6KA] Disconnection of ECMV Solenoid (3rd) 1608
Failure code [DXH6KB] Ground Fault of ECMV Solenoid (3rd) .1610
Failure code [DXH6KY] Hot Short of ECMV Solenoid (3rd) 1612
Failure code [DXH7KA] Disconnection of ECMV Solenoid (Reverse) 1614
Failure code [DXH7KB] Ground Fault of ECMV Solenoid (Reverse) .1616
Failure code [DXH7KY] Hot Short of ECMV Solenoid (Reverse) 1618
Failure code [DXH8KA] Disconnection of ECMV Solenoid (Forward) 1620
Failure code [DXH8KB] Ground Fault of ECMV Solenoid (Forward) .1622
Failure code [DXH8KY] Hot Short of ECMV Solenoid (Forward) 1624
Failure code [DXHHKA] Disconnection of ECMV Solenoid (4th) 1626
Failure code [DXHHKB] Ground Fault of ECMV Solenoid (4th) .1628
Failure code [DXHHKY] Hot Short of ECMV Solenoid (4th) 1630
Failure code [DXHJKA] Disconnection of 3rd EPC Solenoid (EXT) .1632
Failure code [DXHJKB] Ground Fault of 3rd EPC Solenoid (EXT) 1634
Failure code [DXHJKY] Hot Short of 3rd EPC Solenoid (EXT) .1636
Failure code [DXHKKA] Disconnection of 3rd EPC Solenoid (RET) .1638
Failure code [DXHKKB] Ground Fault of 3rd EPC Solenoid (RET) 1640
Failure code [DXHKKY] Hot Short of 3rd EPC Solenoid (RET) .1642
Failure code [DXJEKA] Disconnection of 4th EPC Solenoid (EXT) .1644
Failure code [DXJEKB] Ground Fault of 4th EPC Solenoid (EXT) 1646
Failure code [DXJEKY] Hot Short of 4th EPC Solenoid (EXT) .1648
Failure code [DXJFKA] Disconnection of 4th EPC Solenoid (RET) .1650
Failure code [DXJFKB] Ground Fault of 4th EPC Solenoid (RET) 1652
Failure code [DXJFKY] Hot Short of 4th EPC Solenoid (RET) .1654
Failure code [DY30MA] Malfunction 1 of Emerg. Steering Motor 1656
Failure code [DY30MC] Malfunction 2 of Emerg. Steering Motor 1659
Failure code [DY30ME] Emerg. Steering Long-Time Activated .1663
Failure code [H2K0KA] Failure of Quick Coupler Lock Signal 1665
Failure code [H2K0KY] Hot Short of Quick Coupler Lock Signal 1668
Failure code [LA00L3] Failure of Fan Reverse 1670
Troubleshooting of electrical system (E-mode) .1671
E-1 Engine does not start .1671
E-2 Manual preheating system does not work 1678
E-3 Automatic preheating system does not work .1681
E-4 While preheating is working, preheating monitor does not light up .1683
E-5 All of LCD unit, LED unit, and meter unit on machine monitor display nothing 1685
E-6 LCD unit on machine monitor displays nothing 1688
E-7 Backlight of LCD unit on machine monitor is abnormal (Backlight goes out or flickers) .1690
E-8 LCD on machine monitor does not display properly 1692
E-9 Meter unit display on machine monitor is abnormal .1694
E-10 Night lighting lamp of meter unit on machine monitor is abnormal .1697
E-11 Caution LED on machine monitor is abnormal .1700
E-12 LED of switch panel on machine monitor is abnormal or switches does not operate properly .1702
E-13 Two switches operation of switch panel on machine monitor does not function 1704
E-14 Switch panel buzzer of machine monitor is abnormal .1707
E-15 Rear view monitor does not light up or backlight flickers 1709
E-16 Rear view monitor images are not displayed clearly .1712
E-17 Rear view monitor brightness cannot be adjusted 1715
E-18 Night lighting lamp of rear view monitor is abnormal .1718
E-19 Some items of gauges and caution lamps on machine monitor are not displayed properly .1720
E-20 Parking brake indicator lamp does not light when the parking brake is set to ON (Parking) position .1721
E-21 When brake accumulator oil pressure drops, the brake oil pressure caution lamp does not light 1725
E-22 Air cleaner clogging indicator lamp does not light .1727
E-23 Radiator coolant level caution lamp does not light .1728
E-24 Indication of hydraulic oil temperature gauge does not increase, or hydraulic oil temperature caution lamp does not light 1730
E-25 Indication of torque converter oil temperature gauge does not increase, or torque converter oil temperature caution lamp does not light 1732
E-26 Fuel level gauge does not indicate correct level .1733
E-27 Seat belt caution lamp indication is abnormal 1735
E-28 Horn does not sound 1736
E-29 Horn does not stop sounding 1739
E-30 Alarm buzzer does not sound 1741
E-31 When starting switch is in ON position, alarm buzzer does not stop sounding 1742
E-32 Kickdown does not work when kickdown switch is turned ON .1743
E-33 The hold switch does not work when it is pressed .1745
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 1747
E-35 Transmission cut-off mode is not selected or not released 1750
E-36 Transmission cut-off setting cannot be released 1752
E-37 Directional selector (FNR) switch mode is not selected or not released .1754
E-38 When operating engine power selection switch, engine power selection function does not operate properly 1756
E-39 Flow of loader pump does not increase from the minimum rate 1758
E-40 ECSS function cannot be selected or cannot be released .1759
E-41 None of headlamp, clearance lamp, and tail lamp lights .1761
E-42 Clearance lamp and tail lamp do not light up or go out .1763
E-43 Both High and Low beams of headlamp do not light up or go out 1766
E-44 Low beam of headlamp does not light up or go out .1770
E-45 High beam of headlamp does not light up or go out 1772
E-46 Front working lamp does not light up or go out .1774
E-47 Rear working lamp does not light up or go out 1777
E-48 All of turn signal lamps and hazard lamps do not light up or go out 1780
E-49 Turn signal lamps do not light up or go out 1783
E-50 Hazard lamp does not light up or go out 1786
E-51 Brake lamp does not light up or stays lighted 1789
E-52 Backup lamp does not light or continues to light .1792
E-53 Backup buzzer does not sound or continues to sound .1795
E-54 Front wiper does not operate .1797
E-55 Rear wiper does not operate 1800
E-56 Window washer does not operate .1802
E-57 Fan does not rotate in reverse .1805
E-58 Fan remains in reverse rotation mode .1806
E-59 KOMTRAX system does not operate properly .1807
Troubleshooting of hydraulic and mechanical system (H-mode) .1809
Information described in troubleshooting table (H-mode) .1809
System chart of hydraulic and mechanical systems 1810
Failure mode and cause table 1812
H-1 Machine does not start 1818
H-2 Torque converter lockup clutch is not disengaged (engine stalls) 1821
H-3 Torque converter lockup clutch is not engaged .1822
H-4 Travel speed is slow, bucket thrust force is weak, gradability is low, or gear speed does not shift .1823
H-5 Large shock is made when machine starts or gear is shifted 1826
H-6 Machine starts or gear speed shifts with long time lag 1829
H-7 Torque converter oil temperature is high 1831
H-8 Machine does not turn .1834
H-9 Turning response is poor 1836
H-10 Steering wheel is heavy to turn 1838
H-11 Machine sways or large shocks are made while machine turns .1839
H-12 Turning radius differs between right and left turns 1841
H-13 Wheel brakes do not work or are weak .1842
H-14 Wheel brakes are not released or drag 1843
H-15 Parking brake does not work or it is weak 1844
H-16 Parking brake is not released or drags (including emergency release system) 1845
H-17 Boom does not rise .1846
H-18 Boom moves slow or boom lacks lifting force 1848
H-19 Rising boom slows down at certain height .1850
H-20 Lift cylinders do not serve to hold bucket on ground .1851
H-21 Hydraulic drift of boom is large .1852
H-22 Boom moves up and down during operation 1853
H-23 Bucket does not tilt back 1854
H-24 Bucket moves slow or bucket lacks tilt-back force 1856
H-25 Bucket decelerates during tilt-back operation 1858
H-26 Bucket cylinder does not hold bucket on ground .1859
H-27 Hydraulic drift of bucket is large .1860
H-28 Bucket tilts back and forth during carrying load (work equipment valve in HOLD) 1861
H-29 Boom and bucket control levers do not move smoothly and heavy to move 1862
H-30 Operating work equipment causes engine speed to lower significantly or engine to stall .1864
H-31 Large shocks are made when work equipment starts to move and stops .1865
H-32 When certain work equipment stalls hydraulically, other work equipment moves .1867
H-33 E.C.S.S. (travel damper) does not work and machine pitches and bounces .1868
H-34 Air conditioner does not work while cooling fan rotates in reverse mode 1869
H-35 Fan speed is abnormal (too high or low, or fan doe not rotate) .1870
H-36 Unusual noise is heard from around fan .1871
Troubleshooting of engine (S-mode) 1872
Information described in troubleshooting table (S mode) .1872
S-1 Engine does not crank when starting switch is turned to START position 1873
S-2 Engine cranks but no exhaust smoke comes out 1874
S-3 Fuel is being injected but engine does not start (misfiring: engine cranks but does not start) 1875
S-4 Engine startability is poor .1876
S-5 Engine does not pick up smoothly 1878
S-6 Engine stops during operation .1880
S-7 Engine runs rough or is unstable 1882
S-8 Engine lacks power 1883
S-9 KDPF gets clogged in a short time .1885
S-10 Engine oil consumption is excessive 1887
S-11 Engine oil becomes contaminated early 1888
S-12 Fuel consumption is excessive 1889
S-13 Oil is in coolant (or coolant spurts or coolant level goes down) .1890
S-14 Oil pressure drops .1891
S-15 Fuel mixes into engine oil .1892
S-16 Water mixes into engine oil (milky) 1893
S-17 Coolant temperature rises too high (overheating) .1894
S-18 Unusual noise is heard .1895
S-19 Vibration is excessive .1896
S-20 Air cannot be bled from fuel circuit .1897
S-21 Active regeneration is executed frequently .1898
S-22 Active regeneration takes time .1899
S-23 White smoke is exhausted during active regeneration 1900
50 Disassembly and assembly .1901
Table of contents .1902
Related information on disassembly and assembly .1904
How to read this manual .1904
Coating materials list 1906
Special tools list 1910
Sketches of special tools .1913
Engine and cooling system .1920
Removal and installation of supply pump assembly 1920
Removal and installation of injector assembly .1923
Removal and installation of cylinder head assembly 1934
Removal and installation of engine hood assembly 1953
Removal and installation of grille assembly .1956
Removal and installation of cooling system assembly .1957
Removal and installation of radiator core assembly 1960
Removal and installation of aftercooler .1963
Removal and installation of hydraulic oil cooler assembly .1965
Removal and installation of fuel cooler assembly 1966
Removal and installation of engine, torque converter and transmission assemblies 1967
Disconnection and connection of engine, torque converter and transmission assembly 1974
Removal and installation of engine front oil seal .1976
Removal and installation of engine rear oil seal 1979
Removal and installation of cooling fan and fan motor assembly 1982
Removal and installation of KDPF assembly .1984
Disassembly and assembly of KDPF assembly .1987
Removal and installation of KCCV assembly .1996
Removal and installation of air cleaner assembly 1997
Removal and installation of fuel tank assembly 1999
Power train .2002
Disassembly and assembly of torque converter assembly .2002
Disassembly and assembly of transmission assembly .2009
Disassembly and assembly of transmission clutch pack assembly .2022
Disassembly and assembly of differential assembly .2036
Disassembly and assembly of parking brake assembly 2059
Removal and installation of front axle assembly .2067
Removal and installation of rear axle assembly 2069
Disassembly and assembly of axle housing assembly .2074
Steering system .2084
Removal and installation of steering valve assembly .2084
Brake system 2086
Removal and installation of parking brake disc and plate 2086
Undercarriage and frame .2089
Removal and installation of center hinge pin 2089
Removal and installation of counterweight assembly 2097
Removal and installation of full-length fender assembly .2099
Hydraulic system 2100
Removal and installation of hydraulic tank assembly .2100
Removal and installation of work equipment controll valve assembly 2103
Removal and installation of power train pump and work equipment hydraulic pump assembly .2106
Removal and installation of steering pump and cooling fan pump assembly .2107
Disassembly and assembly of hydraulic cylinder assembly .2109
Work equipment 2116
Removal and installation of work equipment assembly .2116
Cab and its attachments .2121
Removal and installation of operator’s cab and floor frame assembly .2121
Removal and installation of operator’s cab glass (stuck window glass) .2125
Removal and installation of operator’s seat assembly 2133
Removal and installation of seat belt .2135
Electrical system .2136
Removal and installation of machine monitor assembly 2136
Removal and installation of engine controller assembly 2137
Removal and installation of work equipment controller assembly 2138
Removal and installation of transmission controller assembly 2140
Removal and installation of monitor controller assembly .2141
Removal and installation of mass air flow and temperature sensor 2143
Removal and installation of KOMTRAX terminal assembly .2144
60 Maintenance standard .2145
Table of contents .2146
Engine and cooling system .2147
Engine related parts 2147
Cooling fan pump 2148
Cooling fan motor .2151
Power train .2153
Drive shaft .2153
Torque converter 2154
Transmission 2156
Transmission control valve 2163
Forward and reverse clutch ECMV and gear speed clutch ECMV 2164
Lockup clutch ECMV 2165
Main relief and torque converter relief valve .2166
Front axle .2167
Rear axle 2168
Differential 2171
Limited slip differential .2174
Final drive .2178
Steering system .2180
Steering column .2180
Steering pump .2181
Steering valve 2185
Steering cylinder .2187
Emergency steering pump .2189
Brake system 2190
Charge valve 2190
Brake .2192
Parking brake .2194
Parking brake solenoid valve 2195
Undercarriage and frame .2196
Axle mount and center hinge pin .2196
Hydraulic system 2201
Hydraulic tank 2201
Double type gear pump .2202
Work equipment pump .2203
Control valve .2208
Stabilizer valve 2219
Work equipment 2220
Work equipment linkage 2220
Bucket 2223
Work equipment cylinder .2224
80 Appendix .2225
Table of contents .2226
Air conditioner components 2227
Precautions for refrigerant .2227
Air conditioner component .2228
Configuration and function of refrigeration cycle .2230
Outline of refrigeration cycle 2231
Air conditioner unit 2233
Dual pressure switch 2238
Air conditioner controller 2239
Compressor 2240
Condenser .2241
Receiver drier 2242
Sunlight sensor .2244
Outer temperature sensor (outside air temperature sensor) .2245
Procedure for testing and troubleshooting .2246
Circuit diagram and arrangement of connector pins .2248
System diagram 2250
Parts and connectors layout .2253
Testing with self-diagnosis function 2258
Testing temperature control system 2261
Testing vent (mode) changeover 2263
Testing FRESH/RECIRC air changeover .2265
Check evaporator temperature sensor .2267
Testing relays 2269
Troubleshooting chart 1 .2271
Troubleshooting chart 2 .2272
Information in troubleshooting table 2274
Failure code list related to air conditioner 2275
Failure code [879AKA] A/C Inner Sensor Open Circuit .2276
Failure code [879AKB] A/C Inner Sensor Short Circuit 2278
Failure code [879BKA] A/C Outer Sensor Open Circuit .2280
Failure code [879BKB] A/C Outer Sensor Short Circuit 2282
Failure code [879CKA] Ventilating Sensor Open Circuit .2284
Failure code [879CKB] Ventilating Sensor Short Circuit 2286
Failure code [879DKZ] Sunlight Sensor Open or Short Circuit .2288
Failure code [879EMC] Ventilation Damper Abnormality 2290
Failure code [879FMC] Air Mix Damper Abnormality 2293
A-1 Troubleshooting for power supply and CAN communication system (Air conditioner does not operate) 2296
A-2 Troubleshooting for compressor and refrigerant system (Air is not cooled) .2299
A-3 Troubleshooting for blower motor system (No air comes out or air flow is abnormal) 2302
A-4 Troubleshooting for FRESH/RECIRC air changeover .2305
Troubleshooting with gauge pressure .2307
Connection of service tool 2310
Precautions for disconnecting and connecting hoses and tubes in air conditioner circuit .2312
Handling of compressor oil 2314
90 Diagrams and drawings 2317
Table of contents .2318
Hydraulic circuit diagram .2319
Symbols in hydraulic circuit diagram 2319
Power train hydraulic circuit diagram .2323
Hydraulic circuit diagram .2325
Electric circuit diagram 2327
Symbols in electric circuit diagram .2327
Electric circuit diagram of machine body 2331
Electric circuit diagram of floor .2343
INDEX 2375

DESCRIPTION:

Komatsu WA380-7 Wheel Loader Shop Manual SEN05650-13  – PDF DOWNLOAD

• SERIAL NUMBERS 10001 and up

G.B 28/12/24