Komatsu Hydraulic Excavator PC800-8,PC800LC-8 Shop Manual UEN00373-05 PDF

Description

Komatsu Hydraulic Excavator PC800-8,PC800LC-8 Shop Manual UEN00373-05 –  PDF DOWNLOAD

FILE DETAILS:

Komatsu Hydraulic Excavator PC800-8,PC800LC-8 Shop Manual UEN00373-05 –  PDF DOWNLOAD

Language : English
Pages : 1038
Downloadable : Yes
File Type : PDF

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TABLE OF CONTENTS:

Komatsu Hydraulic Excavator PC800-8,PC800LC-8 Shop Manual UEN00373-05 –  PDF DOWNLOAD

• SERIAL NUMBERS
  PC800- 50001           and up
  PC800LC- 50001      and up
  PC800- K5000          and up
  PC800LC- K50001  and up

00 Index and foreword . 3
Index . 3
Organization list of the shop manual 4
Table of contents . 6
00 Index and foreword . 15
Foreword and general information 15
Foreword and general information 16
Safety notice . 16
How to read the shop manual . 20
Explanation of terms for maintenance standard . 22
Handling electric equipment and hydraulic component . 24
How to read electric wire code 32
Method of disassembling and connecting push-pull type coupler . 35
Standard tightening torque table 38
Conversion table 42
01 Specification 49
Specification and technical data 49
Specification and technical data 50
Specification drawings 50
Working range drawing . 51
Specifications 52
Weight table 58
Table of fuel, coolant and lubricants . 61
10 Structure, function and maintenance standard . 65
Engine and cooling system . 65
Engine and cooling system . 66
Coupling 66
Coupling lubrication system . 67
Radiator, oil cooler 68
10 Structure, function and maintenance standard . 71
Power train . 71
Power train . 72
Power train . 72
Swing machinery . 74
Swing circle 76
Final drive . 78
Sprocket 80
10 Structure, function and maintenance standard . 83
Undercarriage and frame . 83
Undercarriage and frame . 84
Track frame and recoil spring . 84
Idler . 86
Carrier roller 88
Track roller 90
Track shoe 92
10 Structure, function and maintenance standard . 97
Hydraulic system, Part 1 97
Hydraulic system, Part 1 98
Hydraulic piping drawing 98
Hydraulic tank, hydraulic filter 100
Hydraulic pump 102
Operation of pump control mechanism . 108
EPC valve . 110
Self pressure reducing valve 113
Cooling fan pump 117
Cooling fan motor . 126
10 Structure, function and maintenance standard . 133
Hydraulic system, Part 2 133
Hydraulic system, Part 2 135
Motor grease pump . 135
Return oil filter . 136
Line oil filter . 137
Drain oil filter 138
L.H. 5-Spool control valve 140
R.H. 4-Spool control valve 146
Straight-travel valve . 153
Swing motor . 156
Center swivel joint . 161
Travel motor 162
PPC accumulator . 172
Work equipment, swing PPC valve . 173
Travel PPC valve 178
Solenoid valve 182
Hydraulic cylinder 188
10 Structure, function and maintenance standard . 191
Work equipment 191
Work equipment 192
Work equipment 192
Dimensions of work equipment 194
10 Structure, function and maintenance standard . 199
Cab and its attachments . 199
Cab and its attachments . 200
Air conditioner piping 200
10 Structure, function and maintenance standard . 203
Electrical system . 203
Electrical system . 204
Engine control 204
Electric control system . 213
Monitor system 247
Sensors . 265
20 Standard value table . 271
Standard service value table 271
Standard service value table 272
Standard service value table for engine . 272
Standard service value table for chassis 273
30 Testing and adjusting 283
Testing and adjusting, Part 1 . 283
Testing and adjusting, Part 1 . 284
Tools for testing, adjusting and troubleshooting 284
Measuring engine speed 286
Measuring intake air pressure (Boost pressure) 287
Measuring exhaust gas temperature . 288
Measuring exhaust gas color . 289
Adjusting valve clearance . 290
Measuring compression pressure 291
Measuring blow-by pressure 292
Measuring engine oil pressure . 293
Handling of fuel system equipment . 294
Remaining pressure relief from fuel system equipment 294
Measuring fuel pressure . 295
Testing fuel return rate and leakage 296
Bleeding air from fuel circuit 298
Testing and adjusting alternator belt tension . 299
Testing and adjusting air conditioner compressor belt . 300
30 Testing and adjusting 303
Testing and adjusting, Part 2 . 303
Testing and adjusting, Part 2 . 304
Inspection of swing circle bearing clearance 304
Testing and adjusting track shoe tension 305
Testing and adjusting work equipment, swing, and travel circuit oil pressures . 306
Testing and adjusting control circuit oil pressure (self pressure reducing valve) . 311
Testing and adjusting main pump control pressure 312
30 Testing and adjusting 319
Testing and adjusting, Part 3 . 319
Testing and adjusting, Part 3 . 320
Measuring PPC valve output pressure . 320
Measuring outlet pressures of solenoid valve, swing PPC shuttle valve, and swing priority selector valve 324
Adjusting work equipment, swing PPC valve . 328
Testing and adjusting travel deviation 329
Inspection of locations of hydraulic drift of work equipment 331
Measuring fan speed . 332
Measuring fan circuit oil pressure 332
Measuring fan pump EPC current 333
Measuring fan pump EPC solenoid valve output pressure . 333
Measuring oil leakage . 334
Release of residual pressure from hydraulic circuit . 338
Bleeding air from each part . 339
Inspection procedures for diode . 342
30 Testing and adjusting 345
Testing and adjusting, Part 4 . 345
Testing and adjusting, Part 4 . 346
Special function of machine monitor . 346
Handling engine controller high voltage circuit . 377
30 Testing and adjusting 379
Testing and adjusting, Part 5 . 379
Testing and adjusting, Part 5 . 380
Procedure for turning on KOMTRAX terminal . 380
KOMTRAX terminal lamp indications . 383
Preparation work for troubleshooting electrical system 386
Pm-clinic service . 389
UNDERCARRIAGE INSPECTION 395
40 Troubleshooting 397
General information on troubleshooting 397
General information on troubleshooting 398
Points to remember when troubleshooting . 398
Sequence of events in troubleshooting . 399
Checks before troubleshooting . 400
Classification and troubleshooting steps 401
Connection table for connector pin numbers 405
T-boxes and T-adapters table 436
40 Troubleshooting 441
Troubleshooting by failure code (Display of code), Part 1 . 441
Troubleshooting by failure code (Display of code), Part 1 . 443
Failure codes table . 443
Information in troubleshooting table 448
Failure code [A000N1] Eng. Hi Out of Std 450
Failure code [AA10NX] Aircleaner Clogging . 452
Failure code [AB00KE] Charge Voltage Low 454
Failure code [B@BAZG] Eng. Oil Press. Low . 456
Failure code [B@BAZK] Eng. Oil Level Low 458
Failure code [B@BCNS] Eng. Water Overheat . 460
Failure code [B@BCZK] Eng. Water Lvl Low 462
Failure code [B@HANS] Hydr. Oil Overheat 464
Failure code [CA111] ECM Critical Internal Failure 466
Failure code [CA115] Eng Ne and Bkup Speed Sens Error . 468
Failure code [CA122] Chg Air Press Sensor High Error 470
Failure code [CA123] Chg Air Press Sensor Low Error . 473
Failure code [CA131] Throttle Sensor High Error . 474
Failure code [CA132] Throttle Sensor Low Error 476
Failure code [CA135] Eng Oil Press Sensor High Error 478
Failure code [CA141] Eng Oil Press Sensor Low Error . 480
Failure code [CA144] Coolant Temp Sens High Error . 482
Failure code [CA145] Coolant Temp Sens Low Error 484
Failure code [CA153] Chg Air Temp Sensor High Error . 486
Failure code [CA154] Chg Air Temp Sensor Low Error 488
Failure code [CA187] Sens Supply 2 Volt Low Error . 489
Failure code [CA221] Ambient Press Sens High Error 490
Failure code [CA222] Ambient Press Sens Low Error . 492
Failure code [CA227] Sens Supply 2 Volt High Error 494
Failure code [CA234] Eng Overspeed 496
Failure code [CA238] Ne Speed Sens Supply Volt Error 498
Failure code [CA263] Fuel Temp Sensor High Error 500
Failure code [CA265] Fuel Temp Sensor Low Error . 502
Failure code [CA271] IMV/PCV1 Short Error . 503
Failure code [CA272] IMV/PCV1 Open Error 504
Failure code [CA273] PCV2 Short Error . 505
Failure code [CA274] PCV2 Open Error 506
Failure code [CA322] Inj #1 (L#1) Open/Short Error 507
Failure code [CA323] Inj #5 (L#5) Open/Short Error 508
Failure code [CA324] Inj #3 (L#3) Open/Short Error 509
Failure code [CA325] Inj #6 (L#6) Open/Short Error 510
Failure code [CA331] Inj #2 (L#2) Open/Short Error 511
Failure code [CA332] Inj #4 (L#4) Open/Short Error 512
Failure code [CA342] Calibration Code Incompatibility . 513
Failure code [CA351] Injectors Drive Circuit Error 514
Failure code [CA352] Sens Supply 1 Volt Low Error . 516
Failure code [CA386] Sens Supply 1 Volt High Error 518
40 Troubleshooting 521
Troubleshooting by failure code (Display of code), Part 2 . 521
Troubleshooting by failure code (Display of code), Part 2 . 523
Failure code [CA441] Battery Voltage Low Error 523
Failure code [CA442] Battery Voltage High Error . 523
Failure code [CA449] Rail Press Very High Error . 524
Failure code [CA451] Rail Press Sensor High Error . 526
Failure code [CA452] Rail Press Sensor Low Error 528
Failure code [CA553] Rail Press High Error 528
Failure code [CA554] Rail Press Sensor In Range Error . 529
Failure code [CA559] Rail Press Low Error . 530
Failure code [CA689] Eng Ne Speed Sensor Error 534
Failure code [CA731] Eng Bkup Speed Sens Phase Error 536
Failure code [CA757] All Persistent Data Lost Error . 537
Failure code [CA778] Eng Bkup Speed Sensor Error 538
Failure code [CA1228] EGR Valve Servo Error 1 . 540
Failure code [CA1625] EGR Valve Servo Error 2 . 541
Failure code [CA1626] BP Valve Sol Current High Error . 542
Failure code [CA1627] BP Valve Sol Current Low Error 544
Failure code [CA1628] Bypass Valve Servo Error 1 545
Failure code [CA1629] Bypass Valve Servo Error 2 546
Failure code [CA1631] BP Valve Pos Sens High Error 548
Failure code [CA1632] BP Valve Pos Sens Low Error . 550
Failure code [CA1633] KOMNET Datalink Timeout Error . 551
Failure code [CA1642] EGR Inter Press Sens Low Error 553
Failure code [CA1653] EGR Inter Press Sens High Error . 554
Failure code [CA2185] Throt Sens Sup Volt High Error 556
Failure code [CA2186] Throt Sens Sup Volt Low Error . 558
Failure code [CA2249] Rail Press Very Low Error . 559
Failure code [CA2271] EGR Valve Pos Sens High Error . 560
Failure code [CA2272] EGR Valve Pos Sens Low Error 562
Failure code [CA2351] EGR Valve Sol Current High Error 564
Failure code [CA2352] EGR Valve Sol Current Low Error . 566
Failure code [CA2555] Grid Htr Relay Volt Low Error . 567
Failure code [CA2556] Grid Htr Relay Volt High Error 568
Failure code [D110KB] Battery Relay Drive S/C . 570
Failure code [D163KB] Flash Light Relay S/C . 572
Failure code [D195KB] Step Light Relay S/C 574
Failure code [DA25KP] Press. Sensor Power Abnormality . 576
Failure code [DA2SKQ] Model Selection Abnormality . 578
Failure code [DA80MA] Auto. Lub. Abnormal . 580
Failure code [DA2RMC] Pump Comm. Abnormality 582
Failure code [DAFRMC] Monitor Comm. Abnormality . 584
Failure code [DGE5KY] Ambi. Temp. Sensor S/C 586
Failure code [DGH2KB] Hydr. Oil Temp. Sensor S/C 588
40 Troubleshooting 591
Troubleshooting by failure code (Display of code), Part 3 . 591
Troubleshooting by failure code (Display of code), Part 3 . 594
Failure code [DH25KA] L Jet Sensor Disc . 594
Failure code [DH25KB] L Jet Sensor S/C 596
Failure code [DH26KA] R Jet Sensor Disc . 598
Failure code [DH26KB] R Jet Sensor S/C 600
Failure code [DHPEKA] F Pump P. Sensor Disc . 602
Failure code [DHPEKB] F Pump P. Sensor S/C 604
Failure code [DHPFKA] R Pump P. Sensor Disc . 606
Failure code [DHPFKB] R Pump P. Sensor S/C 608
Failure code [DV20KB] Travel Alarm S/C 610
Failure code [DW41KA] Swing Priority Sol. Disc 612
Failure code [DW41KB] Swing Priority Sol. S/C . 614
Failure code [DW43KA] Travel Speed Sol. Disc 616
Failure code [DW43KB] Travel Speed Sol. S/C . 618
Failure code [DW45KA] Swing Brake Sol. Disc . 620
Failure code [DW45KB] Swing Brake Sol. S/C 622
Failure code [DW7BKA] Fan Reverse Sol. Disc . 624
Failure code [DW78KB] Fan Reverse Sol. S/C 626
Failure code [DWK0KA] 2-stage Relief Sol. Disc 628
Failure code [DWK0KB] 2-stage Relief Sol. S/C . 630
Failure code [DX16KA] Fan Pump EPC Sol. Disc 632
Failure code [DX16KB] Fan Pump EPC Sol. S/C . 634
Failure code [DXAAKA] F Pump EPC Sol. Disc 636
Failure code [DXAAKB] F Pump EPC Sol. S/C . 638
Failure code [DXABKA] R Pump EPC Sol. Disc 640
Failure code [DXABKB] R Pump EPC Sol. S/C . 642
Failure code [DY20KA] Wiper Working Abnormality . 644
Failure code [DY20MA] Wiper Parking Abnormality . 646
Failure code [DY2CKB] Washer Drive S/C 650
Failure code [DY2DKB] Wiper Drive (For) S/C . 652
Failure code [DY2EKB] Wiper Drive (Rev) S/C . 656
40 Troubleshooting 659
Troubleshooting of electrical system (E-mode) . 659
Troubleshooting of electrical system (E-mode) . 661
Before carrying out troubleshooting of electrical system 661
Information contained in troubleshooting table 663
E-1 Engine does not start (Engine does not rotate) 664
E-2 Preheater does not operate 667
E-3 Auto engine warm-up device does not work 672
E-4 Auto-decelerator does not operate . 673
E-5 All work equipment, swing and travel do not move 674
E-6 Machine push-up function does not operate normally 676
E-7 Boom shockless function does not operate normally . 678
E-8 Any item is not displayed on machine monitor 680
E-9 Part of display on machine monitor is missing . 681
E-10 Machine monitor displays contents irrelevant to the model 681
E-11 Fuel level monitor red lamp lights up while engine is running 682
E-12 Engine coolant thermometer does not display normally . 684
E-13 Hydraulic oil temperature gauge does not display correctly . 686
E-14 Fuel gauge does not display correctly 687
E-15 Swing lock monitor does not display correctly 688
E-16 When monitor switch is operated, nothing is displayed 690
E-17 Windshield wiper and window washer do not work . 692
E-18 “Boom RAISE” is not correctly displayed in monitor function 700
E-19 “Boom LOWER” is not correctly displayed in monitor function 701
E-20 “Arm IN” is not correctly displayed in monitor function 702
E-21 “Arm OUT” is not correctly displayed in monitor function . 703
E-22 “Bucket CURL” is not correctly displayed in monitor function . 704
E-23 “Bucket DUMP” is not correctly displayed in monitor function . 705
E-24 “SWING” is not correctly displayed in monitor function . 706
E-25 “Left travel” is not displayed normally in monitoring function . 708
E-26 “Right travel” is not displayed normally in monitoring function 710
E-27 “Service” is not correctly displayed in monitor function . 712
E-28 KOMTRAX system does not operate normally . 714
E-29 Air conditioner does not work 716
E-30 Step light does not light up or go off . 717
E-31 Electric grease gun does not operate . 720
E-32 Travel alarm does not sound or does not stop sounding 722
40 Troubleshooting 725
Troubleshooting of hydraulic and mechanical system (H-mode) . 725
Troubleshooting of hydraulic and mechanical system (H-mode) . 727
Information in troubleshooting table 727
H-1 Speed or power of all work equipment, travel, and swing is low 728
H-2 Engine speed lowers remarkably or engine stalls . 730
H-3 All work equipment, travel, and swing systems do not work . 731
H-4 Abnormal sound is heard from around pump 732
H-5 Boom speed or power is low 733
H-6 Speed or power of arm is low 735
H-7 Speed or power of bucket is low . 736
H-8 Boom does not move 737
H-9 Arm does not move . 737
H-10 Bucket does not move . 737
H-11 Hydraulic drift of work equipment is large . 738
H-12 Time lag of work equipment is large 740
H-13 Heavy lift function does not operate or stop . 741
H-14 Machine push-up function does not operate or stop 741
H-15 Boom shockless function cannot be turned ON or OFF . 741
H-16 Machine deviates in one direction 742
H-17 Machine deviates largely at start 744
H-18 Machine deviates largely during compound operation . 745
H-19 Travel speed or power is low . 745
H-20 Machine does not travel (only one track) . 746
H-21 Travel speed does not change . 747
H-22 Upper structure does not swing . 748
H-23 Swing speed or acceleration is low . 750
H-24 Swing speed or acceleration is low during compound operation of swing andwork equipment 751
H-25 Upper structure overruns excessively when it stops swinging 753
H-26 Large shock is made when upper structure stops swinging 754
H-27 Large abnormal sound is made when upper structure stops swinging . 755
H-28 Hydraulic drift of swing is large 756
40 Troubleshooting 759
Troubleshooting of engine (S-mode) 759
Troubleshooting of engine (S-mode) 761
Method of using troubleshooting chart . 761
S-1 Starting performance is poor 764
S-2 Engine does not start . 766
S-3 Engine does not pick up smoothly 770
S-4 Engine stops during operations 771
S-6 Engine lacks output (or lacks power) 773
S-7 Exhaust gas color is black (incomplete combustion) 774
S-8 Oil consumption is excessive (or exhaust smoke is blue) . 776
S-9 Oil becomes contaminated quickly 777
S-10 Fuel consumption is excessive 778
S-11 Oil is in coolant (or coolant spurts back or coolant level goes down) 779
S-12 Oil pressure drops . 780
S-13 Oil level rises (Entry of coolant/fuel) 781
S-14 Coolant temperature becomes too high (overheating) . 783
S-15 Abnormal noise is made . 784
S-16 Vibration is excessive . 785
50 Disassembly and assembly . 789
General information on disassembly and assembly . 789
General information on disassembly and assembly . 790
How to read this manual . 790
Coating materials list 792
Special tools list 795
Sketches of special tools . 802
50 Disassembly and assembly . 807
Engine and cooling system, Part 1 . 807
Engine and cooling system, Part 1 . 808
Removal and installation of engine, PTO and hydraulic pump assembly . 808
Removal and installation of cooling assembly 816
Removal and installation of aftercooler . 821
Removal and installation of fuel cooler and air conditioner condenser assembly 823
Removal and installation of fan motor assembly 825
Removal and installation of fuel tank assembly 830
50 Disassembly and assembly . 833
Engine and cooling system, Part 2 . 833
Engine and cooling system, Part 2 . 834
Removal and installation of fuel supply pump assembly . 834
Removal and installation of cylinder head assembly 839
Removal and installation of fuel injector assembly 855
Removal and installation of engine front seal . 858
Removal and installation of engine rear seal 860
50 Disassembly and assembly . 865
Power train . 865
Power train . 866
Removal and installation of PTO (coupling) assembly . 866
Disassembly and assembly of PTO (coupling) assembly . 870
Removal and installation of swing motor and swing machinery assembly 872
Disassembly and assembly of swing machinery assembly 874
Removal and installation of swing circle assembly . 881
Disassembly and assembly of final drive assembly 882
50 Disassembly and assembly . 893
Undercarriage and frame . 893
Undercarriage and frame . 894
Removal and installation of track shoe assembly . 894
Disassembly and assembly of one link in field . 896
Removal and installation of idler assembly 900
Disassembly and assembly of idler assembly 901
Disassembly and assembly of idler adjustment cylinder assembly 904
Removal and installation of recoil spring assembly 905
Disassembly and assembly of recoil spring assembly 907
Removal and installation of carrier roller assembly . 909
Disassembly and assembly of carrier roller assembly . 910
Removal and installation of track roller assembly . 912
Disassembly and assembly of track roller assembly . 913
Removal and installation of revolving frame assembly 916
Removal and installation of counterweight assembly 918
50 Disassembly and assembly . 921
Hydraulic system 921
Hydraulic system 922
Removal and installation of hydraulic tank assembly . 922
Removal and installation of main pump assembly 925
Removal and installation of main pump input shaft oil seal 930
Removal and installation of cooling fan pump assembly . 931
Removal and installation of control valve assembly 934
Assembly of control valve assembly 937
Removal and installation of swing motor assembly 941
Removal and installation of center swivel joint . 943
Disassembly and assembly of center swivel joint assembly 945
Removal and installation of travel motor assembly . 947
Removal and installation of solenoid valve assembly . 948
Removal and installation of boom damping valve assembly . 950
Disassembly and assembly of work equipment PPC valve assembly . 951
Disassembly and assembly of travel PPC valve assembly . 953
Disassembly and assembly of hydraulic cylinder assembly . 954
50 Disassembly and assembly . 961
Work equipment 961
Work equipment 962
Removal and installation of bucket cylinder assembly 962
Removal and installation of bucket cylinder assembly 964
Removal and installation of arm cylinder assembly . 966
Removal and installation of arm cylinder assembly . 968
Removal and installation of boom cylinder assembly 970
Removal and installation of boom cylinder assembly 972
Removal and installation of bottom dump cylinder assembly . 974
Removal and installation of bucket assembly . 975
Removal and installation of bucket assembly . 976
Removal and installation of arm assembly 977
Removal and installation of arm assembly 979
Removal and installation of boom assembly . 980
Removal and installation of boom assembly . 982
Removal and installation of work equipment 984
Removal and installation of work equipment 986
50 Disassembly and assembly . 989
Cab and its attachments . 989
Cab and its attachments . 990
Removal and installation of operator’s cab 990
Removal and installation of operator’s cab glass (stuck glass) 993
Removal and installation of front window assembly .1003
50 Disassembly and assembly .1009
Electrical system .1009
Electrical system .1010
Removal and installation of air conditioner unit assembly .1010
Removal and installation of engine controller assembly 1012
Removal and installation of monitor assembly 1014
Removal and installation of pump controller .1014
Removal and Installation of KOMTRAX terminal assembly .1015
90 Diagrams and drawings 1017
Hydraulic diagrams and drawings .1019
Hydraulic circuit diagram .1019
90 Diagrams and drawings 1023
Electrical diagrams and drawings 1023
Electrical circuit diagram (1/5) 1025
Electrical circuit diagram (2/5) 1027
Electrical circuit diagram (3/5) 1029
Electrical circuit diagram (4/5) 1031
Electrical circuit diagram (5/5) 1033
Connector arrangement diagram .1035

DESCRIPTION:

Komatsu Hydraulic Excavator PC800-8,PC800LC-8 Shop Manual UEN00373-05 –  PDF DOWNLOAD

• SERIAL NUMBERS
  PC800- 50001           and up
  PC800LC- 50001      and up
  PC800- K5000          and up
  PC800LC- K50001  and up

Composition of shop manual
This shop manual contains the necessary technical information for services performed in a workshop.
For ease of understanding, the manual is divided into the following sections.
00. Index and foreword
This section explains the shop manuals list, table of contents, safety, and basic information.
01. Specification
This section explains the specifications of the machine.
10. Structure, function and maintenance standard
This section explains the structure, function, and maintenance standard values of each component.
The structure and function sub-section explains the structure and function of each component. It
serves not only to give an understanding of the structure, but also serves as reference material for
troubleshooting. The maintenance standard sub-section explains the criteria and remedies for disassembly
and service.
20. Standard value table
This section explains the standard values for new machine and judgement criteria for testing,
adjusting, and troubleshooting. This standard value table is used to check the standard values in
testing and adjusting and to judge parts in troubleshooting.
30. Testing and adjusting
This section explains measuring instruments and measuring methods for testing and adjusting, and
method of adjusting each part. The standard values and judgement criteria for testing and adjusting
are explained in Testing and adjusting.
40. Troubleshooting
This section explains how to find out failed parts and how to repair them. The troubleshooting is
divided by failure modes. The “S mode” of the troubleshooting related to the engine may be also
explained in the Chassis volume and Engine volume. In this case, see the Chassis volume.
50. Disassembly and assembly
This section explains the special tools and procedures for removing, installing, disassembling, and
assembling each component, as well as precautions for them. In addition, tightening torque and
quantity and weight of coating material, oil, grease, and coolant necessary for the work are also
explained.
90. Diagrams and drawings (chassis volume)/Repair and replacement of parts (engine volume)
q Chassis volume
This section gives hydraulic circuit diagrams and electrical circuit diagrams.
q Engine volume
This section explains the method of reproducing, repairing, and replacing parts.
2. Revision and distribution
Any additions, revisions, or other change of notices will be sent to KOMATSU distributors. Get the most
up-to-date information before you start any work.

G.B 25/12/24