Komatsu D21A-8E0, D21P-8E0 Bulldozer Shop Manual SEN03320-08 – PDF DOWNLOAD

Description

Komatsu D21A-8E0, D21P-8E0 Bulldozer Shop Manual SEN03320-08 – PDF DOWNLOAD

FILE DETAILS:

Komatsu D21A-8E0, D21P-8E0 Bulldozer Shop Manual SEN03320-08 – PDF DOWNLOAD

Language : English
Pages :465
Downloadable : Yes
File Type : PDF

DESCRIPTION:

Komatsu D21A-8E0, D21P-8E0 Bulldozer Shop Manual SEN03320-08 – PDF DOWNLOAD

SERIAL NUMBERS D21A-90001
D21P-90001 and up

1. General precautions

Mistakes in operation are extremely dangerous. Read the Operation and Maintenance Manual carefully before operating the machine. In addition, read this manual and understand its contents before starting the work.

TABLE OF CONTENTS:

Komatsu D21A-8E0 D21P-8E0 Bulldozer Shop Manual SEN03320-08 – PDF DOWNLOAD

SERIAL NUMBERS D21A-90001
D21P-90001 and up

Cover 1
00 Index and foreword 0
100 Index 3
Composition of shop manual 4
Table of contents 6
200 Foreword and general information 11
Safety notice 12
How to read the shop manual 17
Explanation of terms for maintenance standard 19
Handling of electric equipment and hydraulic component 21
Handling of connectors newly used for engines 30
How to read electric wire code 33
Precautions when carrying out operation 36
Method of disassembling and connecting push-pull type coupler 39
Standard tightening torque table 42
Conversion table 46
01 Specification 0
100 Specification and technical data 53
Specification dimension drawing 55
Specifications 56
Weight table 62
Table of fuel, coolant and lubricant 64
10 Structure, function and maintenance standard 0
100 Engine and cooling system 67
Engine control 68
210 Power train, Part 1 71
Power train system 72
Power train skeleton 73
Damper and universal joint 75
Power train hydraulic piping drawing 77
Transmission control 78
Steering clutch and brake control 82
Transmission 85
Transmission control valve104
220 Power train, Part 2119
Bevel gear shaft, steering clutch and steering brake120
Final drive129
Sprocket132
Steering cylinder133
Brake cylinde135
300 Undercarriage and frame137
Main frame and suspension139
Track frame140
Idler cushion144
Idler146
Track roller148
Carrier roller149
Track shoe150
400 Hydraulic system157
Work equipment hydraulic piping diagram158
Work equipment control159
Hydraulic tank and filter160
Power train and steering pump161
Work equipment pump163
Control valve164
Operation of work equipment control circuit170
PPC valve176
500 Work equipment185
Blade187
Hydraulic cylinder190
600 Electrical system193
Monitor system194
Engine control195
KOMTRAX system197
Sensor201
20 Standard value table 0
100 Standard service value table205
Standard value table for engine206
Standard value table for chassis207
30 Testing and adjusting 0
100 Testing and adjusting213
List of testing, adjusting, and troubleshooting tools214
Measuring engine speed215
Measuring exhaust gas color216
Adjusting valve clearance217
Measuring compression pres219
Testing and adjusting fuel injection timing220
Bleeding air from fuel circuit222
Measuring engine oil pressure222
Testing and adjusting fan belt tension223
Replacing fan belt223
Adjusting fuel control linkage224
Measuring power train oil pressure226
Adjusting PPC valve227
Bleeding air from steering circuit227
Measuring and adjusting work equipment main relief pressure228
Bleeding air from hydraulic cylinders229
Bleeding air from angle cylinder circuit230
Adjusting fuel control lever231
Adjusting travel of inching pedal232
Adjusting steering control linkage233
Adjusting brake pedal travel234
Adjusting brake pedal, brake cylinder235
Adjusting brake lining clearance237
40 Troubleshooting 0
100 General Information on troubleshooting239
Points to remember when troubleshooting240
Sequence of events in troubleshooting241
Checks before troubleshooting242
Classification and steps for troubleshooting244
Types and locations of connectors245
Connection table for connector pin numbers247
T-branch box and T-branch adapter table283
200 Troubleshooting of electrical system (E-mode)287
Before carrying out troubleshooting in E-MODE288
Information contained in troubleshooting table289
E-1 The engine does not start290
E-2 The engine does not stop296
E-3 The heater signal is not heated red, or the heater does not become hot even if the heater signal is heated red298
E-4 The battery is not charged normally (caution lamp lights up)300
E-5 The horn does not sound301
E-6 The headlamp (rear lamp) does not light up302
E-7 The coolant temperature gauge is abnormal304
E-8 The fuel level gauge is abnormal306
E-9 The backup buzzer does not sound308
E-10 The service meter does not operate while engine is running309
E-11 KOMTRAX system does not operate normally310
300 Troubleshooting of hydraulic and mechanical system (H-mode)313
Method of using troubleshooting chart314
H-1 Machine does not start316
H-2 Drawbar pull is weak, travel speed is slow317
H-3 Excessive time lag when starting or shifting gear checks before troubleshooting318
H-4 Steering does not work properly319
H-5 Machine moves when engine is started320
H-6 Excessive shock when starting or shifting gear320
H-7 Level of oil in transmission case or bevel gear case changes320
H-8 Lack of blade lifting force, speed321
H-9 Impossible to raise blade or push up chassis322
H-10 Excessive hydraulic drift of blade323
H-11 Blade moves up and down during leveling operations (control lever at HOLD)323
H-12 Blade goes down323
H-13 Blade tilt lacks power, speed, impossible to push up chassis with tilt324
H-14 Blade cannot be tilted325
H-15 Excessive hydraulic drift of blade tilt326
H-16 Blade angle lacks power, speed (applicable to power angle, power tilt dozer)327
H-17 Blade cannot be angled (applicable to power angle tiltdozer)328
H-18 When blade is angled, blade returns to straight position or shakes during operations (control lever at HOLD)329
H-19 Work equipment control levers are heavy330
400 Troubleshooting of engine (S-mode)333
Method of using matrix troubleshooting chart334
S-1 Starting performance is poor (Starting always takes time)338
S-2 Engine does not start339
S-3 Engine does not pick up smoothly (Follow-up is poor)342
S-4 Engine stops during operations343
S-5 Engine does not rotate smoothly344
S-6 Engine lacks output (no power)345
S-7 Exhaust gas is black (incomplete combustion)346
S-8 Oil consumption is excessive (or exhaust gas is blue)347
S-9 Oil becomes contaminated quickly348
S-10 Fuel consumption is excessive349
S-11 Oil is in coolant, or coolant spurts back, or coolant level goes down350
S-12 Oil pressure lamp lights up (drop in oil pressure)351
S-13 Oil level rises352
S-14 Coolant temperature becomes too high (overheating)353
S-15 Abnormal noise is made354
S-16 Vibration is excessive355
50 Disassembly and assembly 0
100 General information on disassembly and assembly357
How to read this manual358
Coating materials list360
Special tools list363
200 Engine and cooling system367
Removal and installation of fuel injection pump assembly368
Removal and installation of radiator guard assembly370
Removal and installation of engine assembly372
310 Power train, Part 1377
Disassembly and assembly of hydroshift transmission assembly378
Disassembly and assembly of modulating valve assembly401
Disassembly and assembly of selector and inching valve assembly402
320 Power train, Part 2405
Disassembly and assembly of hydroshift transmission assembly406
Removal and installation of steering clutch assembly407
Disassembly and assembly of steering clutch assembly410
Removal and installation of bevel gear shaft and bevel gear assembly414
Removal and installation of final drive assembly423
Removal and installation of final drive first pinion assembly424
Disassembly and assembly of final drive assembly427
400 Undercarriage and frame433
Removal and installation of power train oil cooler assembly434
Removal and installation of recoil spring assembly435
Disassembly and assembly of recoil spring assembly436
Expansion and installation of track shoe assembly437
500 Hydraulic system439
Disassembly and assembly of hydraulic control valve assembly440
Disassembly and assembly of hydraulic cylinder assembly442
600 Work equipment445
Removal and installation of blade446
700 Electric system449
Removal and installation of KOMTRAX terminal assembly450
90 Diagrams and drawings 0
100 Hydraulic diagrams and drawings453
Power train hydraulic circuit diagram455
Work equipment hydraulic circuit diagram457
200 Electrical diagrams and drawings460
Electrical circuit diagram462
Cab and air conditioner electrical circuit diagram463

IMAGES PREVIEW OF THE MANUAL:

S.M 24/12/24