Komatsu WB70A-1 Backhoe Loader Service Manual WEBM003200 PDF

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

DESCRIPTION:

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

FOREWORD

• This shop manual has been prepared as an aid to improve the quality of repairs by giving the operator an ac- curate understanding of the product and by showing him the correct way to perform repairs and make judgements.
• Make sure you understand the contents of this manual and use it to full effect at every opportunity. This shop manual mainly contains the necessary technical information for operations performed in a service workshop. The manual is divided into chapters on each main group of components; these chapters are further divided into the following sections.

STRUCTURE AND FUNCTION
This section explains the structure and function of each component. It serves not only to give an under- standing of the structure, but also serves as reference material for troubleshooting.
TESTING AND ADJUSTING
This sections explains checks to be made before and after performing repairs, as well as adjustments to be made at completion of the checks and repairs.
Troubleshooting charts correlating Problems to Causes are also included in this section.
DISASSEMBLY AND ASSEMBLY
This section explains the order to be followed when removing, installing, disassembling or assembling each component, as well as precautions to be taken for these operations.
MAINTENANCE STANDARD
This section gives the judgement standards when inspecting disassembled parts.

TABLE OF CONTENTS:

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

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
PTO 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 TOOLS104
MEASURING ENGINE SPEED105
ADJUSTING VALVE CLEARANCE106
MEASURING COMPRESSION PRESSURE107
TESTING AND ADJUSTING FUEL INJECTION TIMING108
CHECKING AND TIGHTENING THE FAN – BELT109
MEASURING ACCELERATOR PEDAL OPERATING FORCE AND ACCELERATION LEVER110
ADJUSTING INCH PEDAL TRAVEL111
ADJUSTING BRAKE PEDAL TRAVEL112
TESTING FRAME ARTICULTATION CLEARANCE113
AIR BLEEDING – RELEASING RESIDUAL PRESSURE114
CHECKING AND SETTING PRESSURE IN THE ATTACHMENTS HYDRAULIC CIRCUIT118
TESTING AND ADJUSTING HYDROSTATIC TRANSMISSION122
TESTING AND ADJUSTING TRAVEL MAXIMUM SPEED (UNIERSAL JOINT)128
TESTING TRAVEL MOTOR LEAKEAGE129
ADJUSTING TRANSMISSION SENSOR130
TESTING PRIORITY VALVE OPERATION131
TESTING AND SETTING STEERING CONTROL SYSTEM PRESSURE132
TESTING STEERING CYLINDER LEAKAGE133
TESTING BRAKE SYSTEM134
ADJUSTING PARKING BRAKE LEVER136
CHECKING WEAR IN THE BRAKE DISKS137
ANALYSIS OF CAUSES HYDRAULIC DRIFTS138
ADJUSTING OF CYLINDER DRAFT OF BACKFRAME LOCKING143
30 DISASSEMBLY AND ASSEMBLY147
HOW TO READ THE MANUAL149
PRECAUSIONS TO BE TAKEN WHILE WORKING150
SPECIAL TOOLS (For machine)151
SPECIAL TOOLS (For backhoe)153
STARTER MOTOR155
ALTERNATOR156
INJECTION PUMP157
NOZZLE HOLDER161
CYLINDER HEAD162
RADIATOR – OIL COOLER UNIT164
MUFFLER166
SEAT AND ENGINE HOOD167
SIDE COVER168
HEATING RADIATOR169
CAB170
FUEL TANK174
HYDRAULIC OIL TANK175
ENGINE – PUMP GROUP176
PISTON PUMP AND STEERING PUMP180
PISTON PUMP181
ENGINE-PUMP COUPLING JOINT193
TRAVEL MOTOR194
STEERING PUMP204
STEERING GEAR PUMP205
WORK EQUIPMENT PUMP209
BRAKE PUMP210
TRANSMISSION-REVERSE, DIRECTION INDICATOR AND HEADLING DIPPER BEAM CONTROL GROUP211
STEERING UNIT212
PRIORITY VALVE229
FRONT EQUIPMENT CONTROL VALVE231
FRONT AXLE232
REAR AXLE234
AXLES236
TRANSMISSION252
FRAME JOINT PIN270
FRONT BUCKET LIFT ARM CYLINDERS273
FRONT BUCKET DUMPING CYLINDER274
STEERING CYLINDERS275
FRAME OSCILLATING LOCK CYLINDER276
MACHINE CYLINDERS277
FRAME OSCILLATING LOCK CYLINDER283
FRONT BUCKET284
TILT LEVER AND BUCKET LINK285
FRONT BUCKET LIFT ARM286
BACKHOE CONTROL VALVE287
BACKHOE BOOM CYLINDER290
BACKHOE ARM CYLINDER291
BACKHOE BUCKET CYLINDER292
BACKHOE SWING CYLINDERS293
HOUTRIGGER CYLINDERS294
BACKHOE BACKFRAME LOCK CYLINDERS295
BACKHOE CYLINDERS (boom, arm, bucket, outrigger, jig arm)296
BOOM SWING CYLINDER302
BACKHOE EQUIPMENT305
BACKHOE BUCKET306
ARM307
BACKHOE BOOM308
BRACKET309
BACKFRAME310
40 MAINTENANCE STANDARD313
PTO315
TRANSMISSION316
AXLES318
HYDROSTATIC TRANSMISSION PUMP323
TRAVEL MOTOR327
STEERING PUMP (P2)329
3-SPOOL CONTROL VALVE330
BRAKE PUMP332
OUTRIGGER SAFETY VALVES333
STEERING AND FRONT WORK EQUIPMENT CYLINDERS334
BACKHOE CYLINDERS336
FRAME KNUCKLE AND JOINT340
BACKHOE FRAME341
FRONT WORK EQUIPMENT342
BACKFRAME AND BRACKET344
BACKHOE WORK EQUIPMENT346

IMAGES PREVIEW OF THE MANUAL:

S.M 22/12/24