Komatsu WB91R-2 WB93R-2 Avance Backhoe-Loader Shop Manual WEBM000401 PDF
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Komatsu WB91R-2 WB93R-2 Avance Backhoe-Loader Shop Manual WEBM000401 – PDF DOWNLOAD
- SERIAL NUMBER
WB91R-2 91F20070 and up - WB93R-2 93F21638 and up
Description
Komatsu WB91R-2 WB93R-2 Avance Backhoe-Loader Shop Manual WEBM000401 – PDF DOWNLOAD
FILE DETAILS:
Komatsu WB91R-2 WB93R-2 Avance Backhoe-Loader Shop Manual WEBM000401 – PDF DOWNLOAD
Language : English
Pages : 498
Downloadable : Yes
File Type : PDF
IMAGES PREVIEW OF THE MANUAL:
TABLE OF CONTENTS:
Komatsu WB91R-2 WB93R-2 Avance Backhoe-Loader Shop Manual WEBM000401 – PDF DOWNLOAD
- SERIAL NUMBER
WB91R-2 91F20070 and up - WB93R-2 93F21638 and up
COVER 1
CONTENTS 3
LIST OF REVISED PAGES 5
SAFETY 7
FOREWORD 9
HOT TO READ THE SHOP MANUAL 10
HOISTING INSTRUCTIONS 11
STANDAR TIGHTENING TORQUE 12
COATING MATERIALS 14
ELECTRIC WIRE CODE 15
WEIGHT TABLE 16
TABLE OF OIL AND COOLANT QUANTITIES 17
10 STRUCTURE AND FUNCTION 19
POWER TRAIN 20
TRANSMISSION 22
DRIVE SHAFTS 27
CONTROL VALVE BLOCK 29
FRONT AXLE 30
REAR AXLE 33
HYDRAULIC PUMP 38
HYDRAULIC STEERING SYSTEM 59
HYDRAULIC CIRCUIT 61
SHOVEL CONTROL VALVE 62
BACKHOE CONTROL VALVE 68
CLSS 75
SOLENOID VALVE 89
SAFETY VALVE 90
BRAKE PUMP 92
SHOVEL CYLINDERS 93
BACKHOE CYLINDERS 94
AIR-CONDITIONING UNIT 98
HOT THE AIR-CONDITIONING UNIT FUNCTIONS 99
ELECTRICAL DIAGRAM (1/5) 101
ELECTRICAL DIAGRAM (2/5) 103
ELECTRICAL DIAGRAM (3/5) 105
ELECTRICAL DIAGRAM (4/5) 107
ELECTRICAL DIAGRAM (5/5) 109
20 TESTING AND ADJUSTMENTS 111
NORMAL OR STANDAR TECHNICAL DATA 112
SPECIAL TOOLS 140
MEASURING ENGINE SPEED 141
ADJUSTING VALVE CLEARANCE 142
MEASURING COMPRESSION PRESSURE 143
TESTING AND ADJUSTING FUEL INJECTION TIMING 144
CHECKING AND TGHTENING THE FAN – BELT 146
CHECKING AND TIGHTENING THE COMPRESSOR FAN – BELT 147
MEASURING ACCELERATOR PEDAL OPERATING TRAVEL AND ACCELERATOR LEVER 148
ADJUSTING BRAKE PEDAL TRAVEL, BRAKE ALIGNMENT,MICROSWITCHES 150
AIR BLEEDING – RELEASING RESIDUAL PRESSURE 151
CHECKING AND SETTING PRESSURE IN THE ATTACHMENTS HYDRAULIC CIRCUIT 154
TESTING AND ADJUSTING OF LOAD SENSING SIGNAL 160
CHECKING UNLOADING VALVE FUNCTIONALITY 161
TESTING PUMP DELIVERY 162
TESTING PRIORITY VALVE OPERATION 164
TESTING AND SETTING STEERING CONTROL SYSTEM PRESSURE 165
TESTING BRAKE SYSTEM 166
CONTROL OF THE ENGINE SPEED UNDER LOAD 168
TESTING PRESSURES IN THE POWER TRAIN GROUP 170
TESTING THE CORRECT FUNCTIONING OF THE POWER TRAIN CLUTCHES 172
ADJUSTING THE SENSOR FOR RETURN TO DIG DEVICE 173
ANALYSIS OF CAUSES HYDRAULIC DRIFT 174
TESTING THE AIR-CONDITIONING UNIT 179
30 REMOVAL AND INSTALLATION 181
HOW TO READ THE MANUAL 183
PRECAUTION TO BE TAKEN WHILE WORKING 184
SPECIAL TOOLS 185
STARTING MOTOR 189
ALTERNATOR 190
INJECTION PUMP 192
INJECTION NOZZLES 196
THERMOSTAT 197
COOLING LIQUID PUMP 198
TURBOCOMPRESSOR 200
CYLINDER HEAD 202
FRONT COUNTERWEIGHT 206
RADIATOR-OIL COOLER UNIT 207
RADIATOR-OIL COOLER GROUP 209
CONDENSER 210
HYDRAULIC OIL COOLER 211
TRANSMISSION OIL COOLER 213
MUFFLER – EXHAUST PIPE 214
ENGINE HOOD 215
CAB 217
HEAT AND AIR-CONDITIONING GROUP 221
FUEL TANK 223
HYDRAULIC OIL TANK 224
ENGINE-GEARBOX-PUMP GROUP 225
PISTON PUMP 231
TRANSMISSION 233
CONVERTOR 318
TRANSMISSION-REVERSE,DIRECTION INDICATOR AND HEADLIGHT DIPPER BEAM CONTROL GROUP 319
STEERING UNIT 320
WORKING BRAKE PUMP GROUP 321
FRONT WORKING EQUIPMENT CONTROL VALVE 322
FRONT AXLE 323
REAR AXLE 365
FRONT BUCKET BOOM-RAISING CYLINDER 424
FRONT BUCKET TILT CYLINDERS 425
FRONT BUCKET 426
FRONT WORKING EQUIPMENT 427
BACKHOE CONTROL VALVE 429
BACKHOE BOOM CYLINDER 431
BACKHOE ARM CYLINDER 432
BACKHOE BUCKET CYLINDER 433
OUTRIGGER CYLINDERS 434
BACKHOE SWING CYLINDERS 436
BACKHOE BACKFRAME CYLINDER 437
CYLINDERS 438
BOOM SWING CYLINDER 444
BACKHOE BACKFRAME LOCK CYLINDER 447
BOOM SAFETY CYLINDER 448
BACKHOE WORKING EQUIPMENT 449
BACKHOE BUCKET 450
ARM 451
BACKHOE BOOM 452
BACKHOE SWING BRACKET 453
BACKHOE BACKFRAME 454
40 STANDAR MAINTENANCE 455
TRANSMISSION 457
FRONT AXLE 462
REAR AXLE 465
HYDRAULIC PUMP 470
2-SPOOL CONTROL VALVE 472
3-SPOOL CONTROL VALVE 474
3-SPOOL CONTROL VALVE-with return to dig 476
6-SPOOL CONTROL VALVE 478
7-SPOOL CONTROL VALVE 481
8-SPOOL CONTROL VALVE 483
BRAKE PUMP 485
SHOVEL CYLINDER 486
BACKHOE CYLINDER 488
FRONT WORKING EQUIPMENT 492
SWING BRACKET 494
BACKHOE WORKING EQUIPMENT 496
DESCRIPTION:
Komatsu WB91R-2 WB93R-2 Avance Backhoe-Loader Shop Manual WEBM000401 – PDF DOWNLOAD
- SERIAL NUMBER
WB91R-2 91F20070 and up - WB93R-2 93F21638 and up
Mistakes in operation are extremely dangerous. Read the Operation and 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.
PREPARATIONS FOR WORK:
7. Before adding oil or making any 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, sup- port 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.
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.
14. When raising heavy components, use a hoist or crane.
Check that the wire rope, chains and hooks are free from damage.
Always use lifting equipment which has ample capacity.
Install the lifting equipment at the correct places. Use a hoist or crane and operate slowly to prevent the component from hit- ting any other part. Do not work with any part still raised by the hoist or crane.
15. When removing covers which are under internal pressure or under pressure from a spring, always leave two bolts in position on opposite sides. Slowly release the pressure, then slowly loosen the bolts to remove.
16. When removing components, be careful not to break or damage the wiring. Damaged wiring may cause electrical fires.
17. When removing piping, stop the fuel or oil from spilling out. If any fuel or oil drips on to the floor, wipe it up immediately. Fuel or oil on the floor can cause you to slip, or can even start fires.
G.B 18/12/24
