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Komatsu WB70A-1 Backhoe Loader Shop Manual WEBM003200 PDF
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Komatsu WB70A-1 Backhoe Loader Shop Manual WEBM003200 PDF

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Komatsu WB70A-1 Backhoe Loader Shop Manual WEBM003200 – PDF DOWNLOAD

Serial Number WB70A-1 F10392 and up

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Description

Komatsu WB70A-1 Backhoe Loader Shop Manual WEBM003200 – PDF DOWNLOAD

FILE DETAILS:

Komatsu WB70A-1 Backhoe Loader Shop Manual WEBM003200 – PDF DOWNLOAD 

Language : English
Pages : 348
Downloadable : Yes
File Type : PDF

TABLE OF CONTENTS:

Komatsu WB70A-1 Backhoe Loader Shop Manual WEBM003200 – PDF DOWNLOAD 

Serial Number WB70A-1 F10392 and up

COVER 1
CONTENTS 3
LIST OF REVISED PAGES 5
SAFETY 7
FOREWORD 9
HOW TO READ THE SHOP MANUAL 10
HOISTING INSTRUCTIONS 11
STANDARD TIGHTENING TORQUE 12
COATING MATERIALS 14
ELECTRIC WIRE CODE 15
WEIGHT TABLE 16
TABLE OF OIL AND COOLANT QUANTITIES 17
10 STRUCTURE AND FUNCTION 21
P T O 22
POWER TRAIN 23
TRANSMISSION 24
AXLES 26
HYDROSTATIC TRANSMISSION 32
HYDROSTATIC TRANSMISSION PUMP 34
INCHING VALVE 42
TRAVEL MOTOR 43
STEERING SYSTEM 48
STEERING SYSTEM PUMP 49
STEERING UNIT 50
PRIORITY VALVE 51
FRAMES KNUCKLE AND JOINT 52
HYDRAULIC CIRCUIT DIAGRAM 53
3-SPOOL CONTROL VALVE 55
6-SPOOL CONTROL VALVE 56
7- SPOOL CONTROL VALVE 58
VALVES 60
GEAR PUMP 62
OUTRIGGER SAFETY VALVES 63
BRAKE PUMP 64
FRONT EQUIPMENT CYLINDER 66
FRONT WORK EQUIPMENT 68
LOADER CONTROL LEVER 69
BACKHOE CYLINDER 70
BACKHOE WORK EQUIPMENT 74
BACKOHE CONTROL LEVER 75
SOLENOID VALVE 76
ELECTRIC DIAGRAM 77
20 TESTING AND ADJUSTMENTS 89
NORMAL OR STANDARD TECHNICAL DATA 90
SPECIAL TOOLS 104
MEASURING ENGINE SPEED 105
ADJUSTING VALVE CLEARANCE 106
MEASURING COMPRESSION PRESSURE 107
TESTING AND ADJUSTING FUEL INJECTION TIMING 108
CHECKING AND TIGHTENING THE FAN – BELT 109
MEASURING ACCELERATOR PEDAL OPERATING FORCE AND ACCELERATION LEVER 110
ADJUSTING INCH PEDAL TRAVEL 111
ADJUSTING BRAKE PEDAL TRAVEL 112
TESTING FRAME ARTICULTATION CLEARANCE 113
AIR BLEEDING – RELEASING RESIDUAL PRESSURE 114
CHECKING AND SETTING PRESSURE IN THE ATTACHMENTS HYDRAULIC CIRCUIT 118
TESTING AND ADJUSTING HYDROSTATIC TRANSMISSION 122
TESTING AND ADJUSTING TRAVEL MAXIMUM SPEED (UNIERSAL JOINT) 128
TESTING TRAVEL MOTOR LEAKEAGE 129
ADJUSTING TRANSMISSION SENSOR 130
TESTING PRIORITY VALVE OPERATION 131
TESTING AND SETTING STEERING CONTROL SYSTEM PRESSURE 132
TESTING STEERING CYLINDER LEAKAGE 133
TESTING BRAKE SYSTEM 134
ADJUSTING PARKING BRAKE LEVER 136
CHECKING WEAR IN THE BRAKE DISKS 137
ANALYSIS OF CAUSES HYDRAULIC DRIFTS 138
ADJUSTING OF CYLINDER DRAFT OF BACKFRAME LOCKING 143
30 DISASSEMBLY AND ASSEMBLY 147
HOW TO READ THE MANUAL 149
PRECAUSIONS TO BE TAKEN WHILE WORKING 150
SPECIAL TOOLS (For machine) 151
SPECIAL TOOLS (For backhoe) 153
STARTER MOTOR 155
ALTERNATOR 156
INJECTION PUMP 157
NOZZLE HOLDER 161
CYLINDER HEAD 162
RADIATOR – OIL COOLER UNIT 164
MUFFLER 166
SEAT AND ENGINE HOOD 167
SIDE COVER 168
HEATING RADIATOR 169
CAB 170
FUEL TANK 174
HYDRAULIC OIL TANK 175
ENGINE – PUMP GROUP 176
PISTON PUMP AND STEERING PUMP 180
PISTON PUMP 181
ENGINE-PUMP COUPLING JOINT 193
TRAVEL MOTOR 194
STEERING PUMP 204
STEERING GEAR PUMP 205
WORK EQUIPMENT PUMP 209
BRAKE PUMP 210
TRANSMISSION-REVERSE, DIRECTION INDICATOR AND HEADLING DIPPER BEAM CONTROL GROUP 211
STEERING UNIT 212
PRIORITY VALVE 229
FRONT EQUIPMENT CONTROL VALVE 231
FRONT AXLE 232
REAR AXLE 234
AXLES 236
TRANSMISSION 252
FRAME JOINT PIN 270
FRONT BUCKET LIFT ARM CYLINDERS 273
FRONT BUCKET DUMPING CYLINDER 274
STEERING CYLINDERS 275
FRAME OSCILLATING LOCK CYLINDER 276
MACHINE CYLINDERS 277
FRAME OSCILLATING LOCK CYLINDER 283
FRONT BUCKET 284
TILT LEVER AND BUCKET LINK 285
FRONT BUCKET LIFT ARM 286
BACKHOE CONTROL VALVE 287
BACKHOE BOOM CYLINDER 290
BACKHOE ARM CYLINDER 291
BACKHOE BUCKET CYLINDER 292
BACKHOE SWING CYLINDERS 293
HOUTRIGGER CYLINDERS 294
BACKHOE BACKFRAME LOCK CYLINDERS 295
BACKHOE CYLINDERS (boom, arm, bucket, outrigger, jig arm) 296
BOOM SWING CYLINDER 302
BACKHOE EQUIPMENT 305
BACKHOE BUCKET 306
ARM 307
BACKHOE BOOM 308
BRACKET 309
BACKFRAME 310
40 MAINTENANCE STANDARD 313
P T O 315
TRANSMISSION 316
AXLES 318
HYDROSTATIC TRANSMISSION PUMP 323
TRAVEL MOTOR 327
STEERING PUMP (P2) 329
3-SPOOL CONTROL VALVE 330
BRAKE PUMP 332
OUTRIGGER SAFETY VALVES 333
STEERING AND FRONT WORK EQUIPMENT CYLINDERS 334
BACKHOE CYLINDERS 336
FRAME KNUCKLE AND JOINT 340
BACKHOE FRAME 341
FRONT WORK EQUIPMENT 342
BACKFRAME AND BRACKET 344
BACKHOE WORK EQUIPMENT 346

DESCRIPTION:

Komatsu WB70A-1 Backhoe Loader Shop Manual WEBM003200 – PDF DOWNLOAD

Serial Number WB70A-1 F10392 and up

GENERAL PRECAUTIONS :

Mistakes in operation are extremely dangerous. Read the OPERATION & MAINTENANCE MANUAL carefully BEFORE operating the machine.

1. Before carrying out any greasing or repairs, read all the precautions given on the decals which are fixed to the machine.
2. When carrying out any operation, always wear safety shoes and helmet. Do not wear loose work clothes, or clothes with buttons missing.
● Always wear safety glasses when hitting parts with a hammer.
● Always wear safety glasses when grinding parts with a grinder, etc.
3. If welding repairs are needed, always have a trained, experienced welder carry out the work. When carrying out welding work, always wear welding gloves, apron, glasses, cap and other clothes suited for welding work.
4. When carrying out any operation with two or more workers, always agree on the operating procedure before starting. Always inform your fellow workers before starting any step of the operation. Before starting work, hang UNDER REPAIR signs on the controls in the operator’s compartment.
5. Keep all tools in good condition and learn the correct way to use them.
6. Decide a place in the repair workshop to keep tools and removed parts. Always keep the tools and parts in their correct places. Always keep the work area clean and make sure that there is no dirt or oil on the floor. Smoke only in the areas provided for smoking. Never smoke while working.

PREPARATIONS FOR WORK:

7. Before adding oil or making repairs, park the machine on hard, level ground, and block the wheels or tracks to prevent the machine from moving.
8. Before starting work, lower blade, ripper, bucket or any other work equipment to the ground. If this is not possible, insert the safety pin or use blocks to prevent the work equipment from falling. In addition, be sure to lock all the control levers and hang warning signs on them.
9. When disassembling or assembling, support the machine with blocks, jacks or stands before starting work.
10. Remove all mud and oil from the steps or other places used to get on and off the machine. Always use the handrails, ladders or steps when getting on or off the machine. Never jump on or off the machine. If it is impossible to use the handrails, ladders or steps, use a stand to provide safe footing.

PRECAUTIONS DURING WORK :

11. When removing the oil filler cap, drain plug or hydraulic pressure measuring plugs, loosen them slowly to prevent the oil from spurting out. Before disconnecting or removing components of the oil, water or air circuits, first remove the pressure completely from the circuit.
12. The water and oil in the circuits are hot when the engine is stopped, so be careful not to get burned. Wait for the oil and water to cool before carrying out any work on the oil or water circuits.
13. Before starting work, remove the leads from the battery. ALWAYS remove the lead from the negative (-) terminal first.

IMAGES PREVIEW OF THE MANUAL:

S.V 20/12/24 

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