Complete service repair manual with Electrical Wiring Diagrams for Komatsu Bulldozer D150A & D155A, with all the technical information to maintain, diagnose, repair, and rebuild like professional mechanics.
Komatsu Bulldozer D150A & D155A workshop service repair manual includes:
* Numbered table of contents easy to use so that you can find the information you need fast.
* Detailed sub-steps expand on repair procedure information
* Numbered instructions guide you through every repair procedure step by step.
* Troubleshooting and electrical service procedures are combined with detailed wiring diagrams for ease of use.
* Notes, cautions and warnings throughout each chapter pinpoint critical information.
* Bold figure number help you quickly match illustrations with instructions.
* Detailed illustrations, drawings and photos guide you through every procedure.
* Enlarged inset helps you identify and examine parts in detail.
SEBM0170A07 – Bulldozer D150A-1, D155A-1 Shop Manual.pdf
SEBM0170A07R – Bulldozer D150A-1, D155A-1 Shop Manual (SN8408&up).pdf
PRODUCT DETAILS:
Total Pages: 1,110 + 993 pages
File Format: PDF
Language: English
TABLE OF CONTENTS
GENERAL
ENGINE
POWER TRAIN
UNDERCARRIAGE
HYDRAULIC SYSTEM
WORK EQUIPMENT
OTHERS
SEBM0170A07 – Bulldozer D150A-1, D155A-1 Shop Manual….2
COVER….2
CONTENTS….3
GENERAL….19
GENERAL….20
GENERAL VIEWS….21
SPECIFICATIONS….28
GENERAL ASSEMBLY DRAWING….30
ENGINE ASSEMBLY DRAWING….42
ENGINE SPECIFICATIONS….43
WEIGHT TABLE….46
POSITIONS OF SERIAL NUMBERS….52
TABLE OF OIL AND COOLANT QUANTITIES….54
OIL AND WATER FILLING AND DRAIN POINTS….56
ENGINE….59
11 STRUCTURE AND FUNCTION….59
STRUCTURE AND FUNCTION….60
RADIATOR, FAN….61
OIL COOLER….66
P.T.O. (POWER TAKE-OFF)….67
ENGINE CONTROL….68
FUEL PIPING….69
12 TESTING AND ADJUSTING….70
TESTING AND ADJUSTING….71
TESTING AND ADJUSTING TOOL LIST ….72
TESTING AND ADJUSTING, TROUBLE SHOOTING CRITERIA….73
GENERAL INSTRUCTIONS….77
MEASURING ENGINE SPEED….77
CRANKING METHOD….78
INTAKE AND EXHAUST SYSTEM….79
CHECKING AIR CLEANER ELEMENT FOR CLOGGING….79
INSPECTION OF TURBOCHARGER….80
ADJUSTMENT OF VALVE CLEARANCE….81
CHECKING EXHAUST COLOR….82
ENGINE BODY….83
MEASURING BLOW-BY….83
MEASURING COMPRESSION PRESSURE….84
LUBRICATION SYSTEM….85
CHECKING OIL….85
MEASURING OIL PRESSURE AND TEMPERATURE….86
FUEL SYSTEM….87
CHECKING FUEL….87
CHECKING FUEL CONTROL LEVER POSITION….87
AIR-BLEEDING OF FUEL CIRCUIT….88
CHECKING FUEL DELIVERY TIMING….88
13 DISASSEMBLY AND ASSEMBLY….90
DISASSEMBLY AND ASSEMBLY….91
DISMOUNTING TURBOCHARGER….92
MOUNTING TURBOCHARGER….94
DISMOUNTING ENGINE OIL COOLER….96
MOUNTING ENGINE OIL COOLER….99
DISMOUNTING TORQUE CONVERTER OIL COOLER….102
MOUNTING TORQUE CONVERTER OIL COOLER….105
DISMOUNTING NOZZLE HOLDER….108
MOUNTING NOZZLE HOLDER….109
DISMOUNTING FUEL INJECTION PUMP….110
MOUNTING FUEL INJECTION PUMP….112
DISMOUNTING AND MOUNTING FAN BELT….115
DISMOUNTING WATER PUMP….116
MOUNTING WATER PUMP….118
DISMOUNTING STARTING MOTOR….120
MOUNTING STARTING MOTOR….121
DISMOUNTING ALTERNATOR….122
MOUNTING ALTERNATOR….123
DISMOUNTING CYLINDER HEAD….124
MOUNTING CYLINDER HEAD….131
DISMOUNTING FUEL TANK….139
MOUNTING FUEL TANK….141
DISMOUNTING RADIATOR GUARD….149
MOUNTING RADIATOR GUARD….153
DISMOUNTING RADIATOR….157
MOUNTING RADIATOR ….161
DISMOUNTING ENGINE ….171
MOUNTING ENGINE….179
DISMOUNTING CHASSIS RELATED PARTS FROM ENGINE….210
MOUNTING CHASSIS RELATED PARTS ON ENGINE….212
POWER TRAIN….214
21 STRUCTURE AND FUNCTION….214
STRUCTURE AND FUNCTION….215
GENERAL ….216
MAIN CLUTCH (D150A)….220
INERTIA BRAKE….224
MAIN CLUTCH HYDRAULIC….225
MAIN CLUTCH HYDRAULIC BOOSTER ….226
HYDRAULIC SYSTEM….228
HYDRAULIC CIRCUIT….228
MAIN CLUTCH PUMP….229
TRANSMISSION (D150A)….230
INTERLOCK….235
DOUBLE MESH PREVENTIVE DEVICE….237
TRANSMISSION LUBRICATION VALVE….238
TORQUE CONVERTER (D155A)….239
TRANSMISSION (D155A)….244
POWER TRANSMITTING LINE….250
TORQFLOW HYDRAULIC PIPING….254
TORQFLOW HYDRAULIC SYSTEM….257
TORQFLOW HYDRAULIC CIRCUIT….258
TRANSMISSION LUBRICATION RELIEF VALVE….263
TRANSMISSION CONTROL VALVE….264
TRANSMISSION PUMP….271
TRANSMISSION, STEERING OIL STRAINER….272
TRANSMISSION OIL FILTER….273
BEVEL GEAR SHAFT AND STEERING CLUTCH….274
STEERING AND BRAKE PIPING….277
STEERING HYDRAULIC SYSTEM….281
STEERING HYDRAULIC CIRCUIT….282
BRAKE HYDRAULIC SYSTEM….285
BRAKE HYDRAULIC CIRCUIT….286
STEERING BRAKE AND BOOSTER….289
STEERING CONTROL VALVE….292
STEERING AND BRAKE PIPING….297
STEERING AND BRAKE HYDRAULIC SYSTEM….299
STEERING AND BRAKE HYDRAULIC CIRCUIT….300
STEERING BRAKE AND BOOSTER….301
STEERING CONTROL VALVE….307
STEERING PUMP….312
STEERING OIL FILTER….313
FINAL DRIVE….314
22 TESTING AND ADJUSTING….317
TESTING AND ADJUSTING….318
GENERAL….319
MAIN CLUTCH HYDRAULIC CONTROL….321
TORQFLOW HYDRAULIC CONTROL….323
STEERING HYDRAULIC CONTROL….329
BRAKE HYDRAULIC CONTROL….335
TABLE OF OIL PRESSURE MEASURING POINTS….339
MEASUREMENT OF OIL PRESSURE AND TEMPERATURE….340
PROCEDURE FOR MEASURING OIL PRESSURE AND TEMPERATURE….346
PROCEDURE FOR MEASUREMENT OF LEVER AND PEDAL TRAVEL….352
MEASUREMENT OF OPERATING FORCE….353
ADJUSTMENT PROCEDURE FOR STROKES….356
TABLE OF MAINTENANCE STANDARDS….359
23 DISASSEMBLY AND ASSEMBLY….362
DISASSEMBLY AND ASSEMBLY….363
DISASSEMBLY OF PTO AND FLYWHEEL HOUSING….366
ASSEMBLY OF PTO AND FLYWHEEL HOUSING….370
DISASSEMBLY OF MAIN CLUTCH ASSEMBLY….374
ASSEMBLY OF MAIN CLUTCH ASSEMBLY….377
DISASSEMBLY OF TRANSMISSION ASSEMBLY….382
ASSEMBLY OF TRANSMISSION ASSEMBLY….389
DISMOUNTING TORQUE CONVERTER….399
MOUNTING TORQUE CONVERTER….403
DISASSEMBLY OF TORQUE CONVERTER (1/2),(2/2)….407
ASSEMBLY OF TORQUE CONVERTER (1/2),(2/2)….415
DISMOUNTING TORQUE CONVERTER RELIEF VALVE….431
MOUNTING TORQUE CONVERTER RELIEF VALVE….432
DISMOUNTING TORQUE CONVERTER REGULATOR VALVE….433
MOUNTING TORQUE CONVERTER REGULATOR VALVE….434
DISMOUNTING TORQFLOW TRANSMISSION….435
MOUNTING TORQFLOW TRANSMISSION….443
DISASSEMBLY OF TORQFLOW TRANSMISSION (1/2),(2/2)….451
ASSEMBLY OF TORQFLOW TRANSMISSION (1/2),(2/2)….463
DISMOUNTING TRANSMISSION CONTROL VALVE….485
MOUNTING TRANSMISSION CONTROL VALVE….487
DISASSEMBLY OF TRANSMISSION CONTROL VALVE….489
ASSEMBLY OF TRANSMISSION CONTROL VALVE….491
DISMOUNTING TRANSMISSION LUBRICATION VALVE….494
MOUNTING TRANSMISSION LUBRICATION VALVE….495
DISMOUNTING STEERING CLUTCH….496
MOUNTING STEERING CLUTCH….500
DISASSEMBLY OF STEERING CLUTCH….512
ASSEMBLY OF STEERING CLUTCH ….514
DISMOUNTING BEVEL GEAR AND BEVEL GEAR SHAFT….516
MOUNTING BEVEL GEAR AND BEVEL GEAR SHAFT….519
DISMOUNTING FINAL DRIVE 1ST PINION….525
MOUNTING FINAL DRIVE 1ST PINION….527
DISMOUNTING STEERING CONTROL VALVE….530
MOUNTING STEERING CONTROL VALVE….531
DISMOUNTING STEERING BRAKE INTERLOCKING VALVE….532
MOUNTING STEERING BRAKE INTERLOCKING VALVE….533
DISASSEMBLY OF STEERING CONTROL VALVE….534
ASSEMBLY OF STEERING CONTROL VALVE….536
DISASSEMBLY OF STEERING BRAKE INTERLOCKING VALVE….538
ASSEMBLY OF STEERING BRAKE INTERLOCKING VALVE….538
DISMOUNTING BRAKE SAFETY VALVE….540
MOUNTING BRAKE SAFETY VALVE….541
DISASSEMBLY OF BRAKE SAFETY VALVE….542
ASSEMBLY OF BRAKE SAFETY VALVE….542
ADJUSTING MAIN CLUTCH….544
DISMOUNTING STEERING MAIN RELIEF VALVE….545
MOUNTING STEERING MAIN RELIEF VALVE….545
DISASSEMBLY OF STEERING MAIN RELIEF VALVE….546
ASSEMBLY OF STEERING MAIN RELIEF VALVE….546
DISMOUNTING BRAKE BOOSTER….547
MOUNTING BRAKE BOOSTER….548
DISASSEMBLY OF BRAKE BOOSTER….549
ASSEMBLY OF BRAKE BOOSTER….550
DISASSEMBLY OF FINAL DRIVE….551
ASSEMBLY OF FINAL DRIVE….557
DISMOUNTING TORQFLOW PUMP….564
MOUNTING TORQFLOW PUMP….566
DISMOUNTING STEERING PUMP….568
MOUNTING STEERING PUMP….569
DISMOUNTING TORQUE CONVERTER OIL COOLER….570
MOUNTING TORQUE CONVERTER OIL COOLER….573
DISMOUNTING FLOOR FRAME….576
MOUNTING FLOOR FRAME….580
DISMOUNTING FLOOR FRAME….584
MOUNTING FLOOR FRAME….586
DISMOUNTING ROPS CAB….588
MOUNTING ROPS CAB….591
TILTING ROPS CAB….594
RETURNING ROPS CAB ASSEMBLY TO ITS ORIGINAL POSITION….598
DISMOUNTING FUEL TANK….602
MOUNTING FUEL TANK….604
DISMOUNTING RADIATOR….606
MOUNTING RADIATOR….610
DISMOUNTING RADIATOR GUARD….614
MOUNTING RADIATOR GUARD….618
24 MAINTENANCE STANDARD….622
MAINTENANCE STANDARD….624
MAIN CLUTCH ….625
(1) PLATE, GEAR, SHAFT….625
(2) MAIN CLUTCH BOOSTER….627
(3) INERTIA BRAKE….628
TORQUE CONVERTER (K1015~3724)….629
(1) TORQUE CONVERTER….629
(2) RELIEF VALVE, REGULATOR VALVE….631
TORQUE CONVERTER (K3725～, K1001～)….632
(1) TORQUE CONVERTER….632
(2) RELIEF VALVE, REGULATOR VALVE….635
TRANSMISSION….636
(1) TRANSMISSION CASE, GEAR….636
(2) GEAR SHIFT LEVER….638
TRANSMISSION….640
(1) TRANSMISSION….640
(2) TRANSMISSION CONTROL VALVE….642
(3) TRANSMISSION CONTROL VALVE SPRING….646
BEVEL GEAR SHAFT AND STEERING SYSTEM….650
(1) BEVEL GEAR SHAFT AND BEVEL GEAR….650
(2) STEERING CLUTCH….652
(3) STEERING BRAKE….654
(4) STEERING CONTROL VALVE….655
(5) BRAKE VALVE AND BRAKE BOOSTER….659
FINAL DRIVE….660
UNDERCARRIAGE….663
31 STRUCTURE AND FUNCTION….663
STRUCTURE AND FUNCTION….664
TRACK (MASTER PIN TYPE)….665
TRACK (MASTER LINK TYPE)….666
TRACK GROUP….669
RECOIL SPRING….670
IDLER….671
TRACK ROLLER, CARRIER ROLLER….672
SUSPENSION….673
33 DISASSEMBLY AND ASSEMBLY….675
DISASSEMBLY AND ASSEMBLY….676
SEPARATION OF TRACK….677
CONNECTION OF TRACK….679
DISMOUNTING CARRIER ROLLER….685
MOUNTING CARRIER ROLLER….686
DISMOUNTING TRACK ROLLER….687
MOUNTING TRACK ROLLER….689
DISMOUNTING IDLER….691
MOUNTING IDLER….693
DISMOUNTING RECOIL SPRING….695
MOUNTING RECOIL SPRING….698
DISASSEMBLY OF RECOIL SPRING….701
ASSEMBLY OF RECOIL SPRING….703
DISMOUNTING TRACK FRAME….705
MOUNTING TRACK FRAME….707
34 MAINTENANCE STANDARD….709
MAINTENANCE STANDARD….711
UNDERCARRIAGE….712
(1) TRACK (MASTER PIN TYPE)….712
(2) TRACK (MASTER LINK TYPE) ….714
(2) LDLER….720
(3) TRACK ROLLER….722
(4) CARRIER ROLLER….724
(5) TRACK FRAME….725
(6) RECOIL SPRING….726
HYDRAULIC SYSTEM….727
61 STRUCTURE AND FUNCTION….727
STRUCTURE AND FUNCTION….728
HYDRAULIC CONTROL….729
HYDRAULIC TANK….738
HYDRAULIC CONTROL VALVE….740
RIPPER SELECTOR VALVE AND PILOT CHECK VALVE….743
PIN PULLER VALVE….747
PILOT VALVE….751
ROTARY SERVO VALVE….753
SERVO VALVE HYDRAULIC CONTROL (D150A)….756
SERVO VALVE HYDRAULIC CIRCUIT (D150A)….756
SERVO VALVE HYDRAULIC CONTROL (D155A)….757
SERVO VALVE HYDRAULIC CIRCUIT (D155A)….757
SAFETY VALVE….759
CYLINDER….760
PISTON VALVE….762
QUICK DROP VALVE….763
HYDRAULIC CONTROL ….764
PIN PULLER….786
62 TESTING AND ADJUSTING….789
TESTING AND ADJUSTING….790
GENERAL DESCRIPTION….791
HYDRAULIC CONTROL….792
PIN PULLER CONTROL….794
TABLE OF OIL PRESSURE MEASURING POINTS….795
MEASUREMENT OF OIL PRESSURE AND TEMPERATURE….796
MEASUREMENT PROCEDURE OF OIL PRESSURE AND TEMPERATURE….797
MEASURING THE HYDRAULIC PUMP DELIVERY….798
MEASUREMENT OF OPERATING FORCE….800
MEASUREMENT OF HYDRAULIC DRIFT RATE OF WORK EQUIPMENT….801
TABLE OF MAINTENANCE STANDARD….802
63 DISASSEMBLY AND ASSEMBLY….804
DISASSEMBLY AND ASSEMBLY….805
DISMOUNTING HYDRAULIC PUMP….808
MOUNTING HYDRAULIC PUMP….810
DISMOUNTING HYDRAULIC TANK….812
MOUNTING HYDRAULIC TANK….816
DISMOUNTING RIPPER AND BLADE CONTROL VALVE….820
MOUNTING RIPPER AND BLADE CONTROL VALVE….822
DISASSEMBLY OF RIPPER AND BLADE CONTROL VALVE….824
ASSEMBLY OF RIPPER AND BLADE CONTROL VALVE….827
DISASSEMBLY OF BLADE TILT CONTROL VALVE….830
ASSEMBLY OF BLADE TILT CONTROL VALVE….831
DISMOUNTING BLADE LIFT SERVO VALVE….832
MOUNTING BLADE LIFT SERVO VALVE….834
DISMOUNTING BLADE TILT SERVO VALVE….836
MOUNTING BLADE TILT SERVO VALVE….837
DISMOUNTING RIPPER SERVO VALVE….838
MOUNTING RIPPER SERVO VALVE….840
DISMOUNTING RIPPER PIN PULLER VALVE….842
MOUNTING RIPPER PIN PULLER VALVE….844
DISASSEMBLY OF PIN PULLER VALVE….846
ASSEMBLY OF PIN PULLER VALVE….847
DISMOUNTING RIPPER SELECTOR VALVE….848
MOUNTING RIPPER SELECTOR VALVE….851
DISASSEMBLY OF RIPPER SELECTOR VALVE….854
ASSEMBLY OF RIPPER SELECTOR VALVE….859
DISMOUNTING BLADE LIFT CYLINDER….864
MOUNTING BLADE LIFT CYLINDER….865
DISASSEMBLY OF BLADE LIFT CYLINDER ….866
ASSEMBLY OF BLADE LIFT CYLINDER….872
DISMOUNTING BLADE TILT CYLINDER….878
MOUNTING BLADE TILT CYLINDER….879
DISASSEMBLY OF BLADE TILT CYLINDER….880
ASSEMBLY OF BLADE TILT CYLINDER….886
DISMOUNTING RIPPER LIFT CYLINDER….892
MOUNTING RIPPER LIFT CYLINDER….893
DISMOUNTING RIPPER TILT CYLINDER….894
MOUNTING RIPPER TILT CYLINDER….895
DISASSEMBLY OF RIPPER CYLINDER….896
ASSEMBLY OF RIPPER CYLINDER….902
DISMOUNTING RIPPER PIN PULLER CYLINDER….908
MOUNTING RIPPER PIN PULLER CYLINDER….909
64 MAINTENANCE STANDARD….910
MAINTENANCE STANDARD….912
HYDRAULIC CONTROL VALVE….913
(1) BLADE LIFT AND RIPPER CONTROL VALVE….913
(2) BLADE LIFT CONTROL VALVE….914
(3) MAIN RELIEF VALVE….915
(4) SUCTION VALVE, SAFETY VALVE….916
(5) RIPPER SELECTOR VALVE….917
(6) RIPPER PIN PULLER VALVE….918
(7) PILOT VALVE….919
CYLINDER….920
(1) BLADE LIFT CYLINDER….920
(2) BLADE TILT CYLINDER….921
(3) RIPPER LIFT CYLINDER AND RIPPER TILT CYLINDER….922
WORK EQUIPMENT….923
71 STRUCTURE AND FUNCTION….923
STRAIGHT TILT DOZER….925
MULTI RIPPER….927
GIANT RIPPER….931
72 TESTING AND ADJUSTING….937
TESTING AND ADJUSTING….938
73 DISASSEMBLY AND ASSEMBLY….941
DISASSEMBLY AND ASSEMBLY….942
DISMOUNTING BLADE….943
MOUNTING BLADE….945
DISASSEMBLY TO BLADE….947
ASSEMBLY OF BLADE….950
DISASSEMBLY OF RIPPER….953
ASSEMBLY OF RIPPER….958
74 MAINTENANCE STANDARD….963
MAINTENANCE STANDARD….965
STRAIGHT TILT DOZER….966
(1) BLADE, FRAME, ARM AND CYLINDER YOKE….966
(2) CUTTING EDGE AND END BIT….968
MULTI RIPPER….969
GIANT RIPPER….971
OTHERS….973
90 ELECTRICAL SYSTEM….973
ELECTRICAL SYSTEM….974
ELECTRICAL CIRCUIT DIAGRAM….975
ELECTRICAL WIRING DIAGRAM ….983
WARNING MODULE….986
CORRECTIVE ACTION TO BE TAKEN WHEN WARNING MODULE IS ACTIVATED….987
A.P.S.(AUTOMATIC PRIMING SYSTEM)….989
SEBM0170A07R – Bulldozer D150A-1, D155A-1 Shop Manual (SN8408&up)….995
….995
Contents….996
Safety….1003
How to read the shop manual….1006
Hoisting instructions….1007
Standard tightening torque….1008
01 General….1011
Specifications….1022
General assembly drawing….1024
Engine specifications….1037
Weight table….1040
Position of serial numbers (Engine)….1046
Position of serial numbers (body)….1047
Table of oil and coolant….1048
11 Engine structure and function….1055
Radiator, fan….1058
Oil cooler….1064
P.T.O….1065
Engine control….1066
Fuel piping….1067
12 Engine Testing and adjusting….1069
Tool list….1072
Trouble shooting criteria….1073
General instructions….1078
Intake ans exhaust system….1080
Engine body….1084
Lubrication system….1086
Fuel system….1088
13 Engine disassembly and assembly….1091
Dismounting turbocharger….1094
mounting turbocharger….1096
Dismounting engine oil cooler….1098
Mounting engine oil cooler….1102
torque convertor oil cooler….1106
Nozzle holder….1112
Fuel injection pump….1116
Fan belt….1122
Water pump….1124
Starting motor….1128
Alternator….1131
Cylinder head….1136
Fuel tank….1152
Radiator guard….1162
Radiator….1170
Engine….1184
21 Power traing Structure and functions….1231
General….1234
Main clutch….1238
Inertia brake….1242
Transmisssion D150A….1248
Double mesh preventive device….1255
Torque convertor….1258
Transmission D155A….1262
Torqflow….1272
Transmission lubrication relief vanlve….1280
Transmission control valve….1281
Transmission pump….1289
Bevel gear shaft and steering clutch….1292
Steering and brake piping….1296
steering hydraulic system….1300
Brake hydraulic system….1304
Steering brake and booster D150A AND D155A….1308
Steering control valve….1312
Steering and brake piping….1318
Steering and brake hydraulic circuit….1321
Steering brake and booster D155A 25001….1322
Steering control valve d155a 25001….1328
Steering pump….1333
Final drive….1335
22 power train testing and adjusting….1339
Main clutch hydraulic control….1344
Torqflow hydraulic control….1346
Steering hydraulic control….1352
Brake hydraulic control….1358
Table of oil pressure measuring points….1362
Procedure for measuring oil pressure and temperature….1370
Procedure for measurment of lever and pedal travel….1376
Adjustment procedure for strokes….1380
Adjusting main clutch….1384
Table of maintenance standerds….1386
23 Power train disassembly and assembly….1389
pto and flywheel….1394
Main clutch….1402
Transmission assembly….1410
Torque convertor….1428
Torque convertor relief valve….1462
Torque converter regulator valve….1466
Torqflow transmission D155 15001 – 25000….1470
Torqflow transmission D155A Sn 25001….1510
Mounting Torqflow transmission….1515
Dismounting Transmission control valve….1520
Mounting transmission control valve….1522
Transmission lubrication valve….1529
Steering clutch….1532
Bevel gear and bevel gear shaft….1552
Final drive….1562
Steering control valve….1568
Steering brake interlocking valve….1572
Brake safety valve….1580
Brake booster….1588
Final drive….1594
Torqflow pump….1608
Steering pump….1612
Torque converter oil cooler….1616
Floor frame….1624
Rops cab….1636
Fuel tank….1650
Radiator….1654
Radiator guard….1662
24 Power Train Maintenance standard….1671
Transmission….1686
Bevel gear shaft and steering system….1700
Final drive….1714
31 Undercarriage Structure and function….1717
Track….1720
Track group….1724
Recail spring….1725
Idler….1726
Track roller, carrier roller….1727
Suspension….1728
32 undercarriage Testing and adjusting….1731
33 indercarriage Disassembly and assembly….1733
track….1736
Carrier roller….1744
Track roller….1748
Idler….1752
Recoil spring….1756
Track frame….1768
34 Undercarriage maintenance standard….1773
Undercarriage….1776
61 Hydraulic system structure and function….1791
Hydraulic control….1794
Hydraulic tank….1804
Hydraulic control valve….1806
Ripper selector valve and pilot check valve….1810
Pin puller valve….1814
Pilot valve….1818
Rotary servo valve….1821
Servo valve hydralic control/valve….1824
Safety valve….1827
Cylinders….1828
Piston valve….1830
Hydraulic control….1832
62 Hydraulic system testing and adjusting….1857
General description….1860
Hydraulic control….1862
Pin puller control….1864
Measurment of oil pressure and temperature….1865
Measurment of operating force….1869
Table of maintance standard….1872
63 Hydraulic control sysyem Disassembly and assembly….1875
Disassembly and assembly….1877
Hydraulic pump….1880
Hydraulic tank….1884
Ripper & blade control valve….1892
Blade tilt control valve….1903
Blade tilt servo valve….1908
Ripper servo valve….1916
Ripper pin puller valve….1920
Ripper selector valve….1928
Blade lift cylinder….1947
Blade tilt cylinder….1964
Ripper lift & Tilt cylinder….1980
Ripper pin puller cylinder….2000
64 Hydraulic system Maintance standard….2003
Torque specifications for nuts and bolts….2004
Hydraulic control valve….2006
Cylinders….2015
71 Work equipment structure and function….2019
Multi ripper….2024
Giant ripper….2028
72 Work equipment testing and adjustment….2035
Straight tilt dozer….2038
73 work equipment disassembly & assembly….2041
Blade….2044
Ripper….2055
74 Work equipment Maintenance standard….2067
Torque specifications….2068
Straight tilt dozer….2070
Multi ripper….2074
Giant ripper….2076
90 Others Electrical system….2079
Electical circuit diagram….2082
Electical wiring diagram….2090
Warning module….2093
Automatic priming system….2096
Komatsu Bulldozer D150A & D155A Repair Service Manual