Komatsu WB93S-5 Backhoe-Loader Shop Manual WEBM007400 PDF
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Komatsu WB93S-5 Backhoe-Loader Shop Manual WEBM007400 – PDF DOWNLOAD
- SERIAL NUMBER WB93S-5 F00003 and up
Description
Komatsu WB93S-5 Backhoe-Loader Shop Manual WEBM007400 – PDF DOWNLOAD
FILE DETAILS:
Komatsu WB93S-5 Backhoe-Loader Shop Manual WEBM007400 – PDF DOWNLOAD
Language : English
Pages : 490
Downloadable : Yes
File Type : PDF
IMAGES PREVIEW OF THE MANUAL:
TABLE OF CONTENTS:
Komatsu WB93S-5 Backhoe-Loader Shop Manual WEBM007400 – PDF DOWNLOAD
- SERIAL NUMBER WB93S-5 F00003 and up
CONTENTS 3
REVISED PAGES . 5
k SAFETY 7
FOREWORD 9
HOW TO READ THE SHOP MANUAL . 10
HOISTING INSTRUCTIONS . 11
STANDARD TIGHTENING TORQUE 12
COATING MATERIALS . 14
ELECTRIC 15
WEIGHT TABLE 16
TABLE OF OIL AND COOLANT QUANTITIES . 17
CONVERSION TABLE 19
10 STRUCTURE AND FUNCTION . 27
POWER TRAIN . 28
TRANSMISSION (4WD) 30
TRANSMISSION 32
DRIVE SHAFTS 35
CONTROL VALVE BLOCK . 37
FRONT AXLE 38
REAR AXLE . 41
STEERING SYSTEM (4WS) . 45
HYDRAULIC CIRCUIT (WITH MECHANICAL CONTROL) . 49
HYDRAULIC CIRCUIT (WITH SERVOCONTROL) . 50
HYDRAULIC PUMP 51
1. MAIN PUMP 52
2. DELIVERY CONTROL VALVE . 57
8-SPOOL CONTROL VALVE (WITH MECHANICAL CONTROL) . 66
10-SPOOL CONTROL VALVE (WITH MECHANICAL CONTROL) 72
8-SPOOL CONTROL VALVE (WITH SERVOCONTROL) . 78
10-SPOOL CONTROL VALVE (WITH SERVOCONTROL) 84
CLSS 91
1. DESCRIPTION 91
2. OPERATING PRINCIPLES . 92
3. OPERATION FOR EACH CIRCUIT AND VALVE . 94
STEERING UNIT .112
PPC VALVES 113
SHOVEL PPC VALVE (STANDARD) .113
SHOVEL PPC VALVE (FLOAT + RETURN TO DIG) 117
OUTRIGGERS PPC VALVE 123
PPC VALVE (SERVOCONTROL VERSION) 128
L.H. PPC VALVE 128
R.H. PPC VALVE 129
SOLENOID VALVE GROUP (EV1) 130
VERSION WITH MECHANICAL CONTROLS WITHOUT 4 IN 1 BUCKET 130
VERSION WITH MECHANICAL CONTROLS WITH 4 IN 1 BUCKET .131
VERSION WITHOUT 4 IN 1 BUCKET .132
VERSION WITH 4 IN 1 BUCKET 133
SAFETY VALVES .134
SHOVEL RAISE 134
SHOVEL DUMP .135
BOOM 136
ARM .137
SHOVEL CYLINDERS 138
RAISING CYLINDER 138
DUMPING CYLINDER 138
4 IN 1 BUCKET .139
BACKHOE CYLINDERS .140
BOOM CYLINDER .140
ARM .140
BUCKET CYLINDER .141
OUTRIGGER CYLINDER 141
BOOM SWING CYLINDER .142
JIG ARM CYLINDER 142
AIR-CONDITIONING UNIT .144
OPERATION OF THE AIR CONDITIONING UNIT 145
FUSE AND RELAY CENTRE .147
DRIVER SEAT WIRING 148
SWITCH PANEL WIRING .149
FRONT DASH WIRING .150
ROOF WIRING .151
ENGINE WIRING .152
SPEED SELECTOR WIRING .153
BACKHOE WIRING 154
4WS PUSH-BUTTONS PANEL WIRING .155
4WD SOLENOID VALVES WIRING 156
WIRING DIAGRAM (STANDARD VERSION) (see also Group 90) .157
20 TESTING AND ADJUSTMENTS 159
NORMAL OR STANDARD TECHNICAL DATA .161
SPECIAL TOOLS .185
ADJUSTING VALVE CLEARANCE .187
ENGINE SPEED TESTS 188
TENSIONING THE AIR-CONDITIONING COMPRESSOR BELT .190
BLEEDING AIR FROM CIRCUITS – ELIMINATING RESIDUAL PRESSURE 191
ADJUSTING ACCELERATOR PEDAL TRAVEL AND ACCELERATOR LEVER 193
ADJUSTING BRAKE PEDAL SLACK/ALIGNMENT .195
BRAKING SYSTEM CHECKS .196
PARKING BRAKE ADJUSTMENT 199
CHECKING AND SETTING PRESSURE IN THE ATTACHMENTS HYDRAULIC CIRCUIT 201
CHECKING THE SETTING OF MAIN RELIEF AND SECONDARY VALVES 203
SETTING THE MAIN RELIEF VALVES AND THE REDUCING VALVES 207
CHECKING AND ADJUSTING THE LS DIFFERENTIAL PRESSURE. ADJUSTING THE LS VALVE .209
CHECKING AND ADJUSTING SERVOCONTROLS SUPPLY PRESSURE 211
ADJUSTING THE PC VALVE 212
TESTING AND SETTING STEERING CONTROL SYSTEM PRESSURE 213
CHECKING FOR LEAKS IN THE STEERING CYLINDERS 214
TESTING PRESSURES IN THE POWER TRAIN GROUP 215
TESTING THE CORRECT FUNCTIONING OF THE POWER TRAINCLUTCHES 217
ANALYSIS OF CAUSES HYDRAULIC DRIFT 218
FRONT EQUIPMENT .218
BACKHOE .220
TESTING THE AIR-CONDITIONING UNIT .223
EMPTYING THE AIR-CONDITIONING UNIT 225
TROUBLESHOOTING .226
FRONT AXLE TROUBLESHOOTING 226
FRONT AXLE CHECKING AND TROUBLESHOOTING .229
REAR AXLE TROUBLESHOOTING .231
REAR AXLE CHECKING AND TROUBLESHOOTING 234
TRANSMISSION TROUBLESHOOTING 236
30 REMOVAL AND INSTALLATION .239
HOW TO READ THE MANUAL 241
PRECAUTIONS TO BE TAKEN WHILE WORKING .242
SPECIAL TOOLS .243
ENGINE HOOD .247
Removal .247
Installation 248
FRONT GUARD .249
Removal .249
Installation 249
RADIATOR GROUP 250
Removal .250
Installation 253
CONDENSER .254
(For machines equipped with an air-conditioning unit) .254
Removal .254
Installation 254
MUFFLER .255
Removal .255
Installation 255
AIR FILTER 256
Removal .256
Installation 256
TURBOCHARGER 257
Removal .257
Installation 258
AIR-CONDITIONING UNIT COMPRESSOR 259
Removal .259
Installation 260
AIR-CONDITIONING UNIT COMPRESSOR BELT .261
Removal .261
Installation 262
EXHAUST PIPE 263
Removal .263
Installation 263
FAN AND HEATING GROUP .264
Removal .264
Installation 269
BATTERY .270
Removal .270
Installation 271
FUEL TANK .272
Removal .272
Installation 273
STEERING WHEEL AND TRANSMISSION-REVERSE, DIRECTION INDICATOR AND HEADLIGHT DIPPER BEAM CONTROL GROUP 274
Removal .274
Installation 275
WORKING BRAKE PUMP GROUP 276
Removal .276
Installation 278
STEERING UNIT .279
Removal .279
Installation 280
CAB .281
Removal .281
Installation 288
HYDRAULIC OIL TANK 289
Removal .289
Installation 295
HYDRAULIC PUMP 296
Removal .296
Installation 297
TRANSMISSION 298
Removal .298
Installation 302
TRANSMISSION 303
Disassembly and assembly 303
CONVERTOR .407
Removal .407
Installation 407
ENGINE 408
Removal .408
Installation 412
CONTROL VALVE (Standard version) 413
Removal .413
Installation 416
CONTROL VALVE (version with servocontrol) .417
Removal .417
Installation 419
STEERING SOLENOID VALVE GROUP .420
Removal .420
Installation 420
FRONT AXLE 421
Removal .421
Installation 423
FRONT AXLE 425
Disassembly and assembly 425
REAR AXLE .469
Removal .469
Installation 471
Disassembly and assembly 472
SHOVEL PPC VALVE 533
Removal .533
Installation 534
SHOVEL LIFT CYLINDERS .535
Removal .535
Installation 536
SHOVEL DUMP CYLINDERS .537
Removal .537
Installation 538
SHOVEL 539
Removal .539
Installation 539
FRONT WORKING EQUIPMENT .540
Removal .540
Installation 541
BACKHOE PPC VALVES (Optional) .542
Removal .542
Installation 543
PPC VALVE SUPPORT RELEASE CABLES 544
Removal .544
Installation and adjusting 546
PPC VALVE SUPPORT RETURN GAS SPRING .547
Removal .547
Installation 548
SOLENOID VALVE GROUP (servocontrol and optional attachment) .549
Removal .549
Installation 550
BACKHOE BOOM CYLINDER .551
Removal .551
Installation 553
ARM CYLINDER 554
Removal .554
Installation 555
JIG ARM CYLINDER 556
Removal .556
Installation 556
OUTRIGGER CYLINDER 557
Removal .557
Installation 558
BACKHOE SWING CYLINDERS .559
Removal .559
Installation 561
BACKHOE BUCKET CYLINDER .562
Removal .562
Installation 563
BACKHOE BOOM SAFETY CYLINDER 564
Removal .564
Installation 565
CYLINDER 566
SHOVEL ARM, SHOVEL, BOOM, ARM, BUCKET, OUTRIGGERS .566
Disassembly .566
Assembly 568
BACKHOE SWING CYLINDERS .571
Disassembly .571
Assembly 574
BACKHOE WORKING EQUIPMENT .577
Removal .577
Installation 578
BACKHOE BUCKET 579
Removal .579
Installation 579
BACKHOE BOOM CYLINDER .580
Removal .580
Installation 580
ARM .581
Removal .581
Installation 581
JIG ARM .582
Removal .582
Installation 582
2nd ARM .583
Removal .583
Installation 583
2nd ARM GUIDES 584
Removal .584
Installation 584
BACKHOE SWING BRACKET .585
Removal .585
Installation 585
COMPLETE BACKHOE BACKFRAME 586
Removal .586
Installation 587
BACKFRAME LOCK PISTONS 588
Removal .588
Installation 589
40 STANDARD MAINTENANCE .591
TRANSMISSION 592
FRONT AXLE 597
REAR AXLE .600
HYDRAULIC PUMP 604
CONTROL VALVE .606
8-SPOOL VERSION (WITH MECHANICAL CONTROL) .606
10-SPOOL VERSION (WITH MECHANICAL CONTROL) 614
8-SPOOL VERSION (WITH SERVOCONTROL) .622
10-SPOOL VERSION (WITH SERVOCONTROL) 630
PPC VALVES 638
SHOVEL CONTROL 638
SHOVEL CYLINDERS 640
DUMP CYLINDER .640
RAISE CYLINDER 640
4 IN 1 BUCKET .641
BACKHOE CYLINDERS .642
BOOM 642
ARM .642
BUCKET 642
BOOM SWING 643
OUTRIGGERS 644
JIG ARM .644
FRONT WORKING EQUIPMENT .646
SWING BRACKET .648
BACKHOE WORKING EQUIPMENT .650
90 OTHER 653
ELECTRICAL DIAGRAM (STANDARD VERSION) .655
DESCRIPTION:
Komatsu WB93S-5 Backhoe-Loader Shop Manual WEBM007400 – PDF DOWNLOAD
- SERIAL NUMBER WB93S-5 F00003 and up
This shop manual has been prepared as an aid to improve the quality of repairs by giving the operator an accurate
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 understanding
of the structure, but also serves as reference material for troubleshooting.
TESTING AND ADJUSTMENTS
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.
REMOVAL AND INSTALLATION
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.
STANDARD MAINTENANCE
This section gives the judgement standards when inspecting disassembled parts.
G.B 26/12/24
