Komatsu Backhoe-Loader WB93S-5E0 Shop Manual WEBM008302 – PDF DOWNLOAD

Komatsu Backhoe-Loader WB93S-5E0 Shop Manual WEBM008302 – PDF DOWNLOAD

FILE DETAILS:

Komatsu Backhoe-Loader WB93S-5E0 Shop Manual WEBM008302 – PDF DOWNLOAD

Language : English
Pages : 610
Downloadable : Yes
File Type : PDF
Size: 32.4 MB

IMAGES PREVIEW OF THE MANUAL:

DESCRIPTION:

Komatsu Backhoe-Loader WB93S-5E0 Shop Manual WEBM008302 – PDF DOWNLOAD

SERIAL NUMBERWB93S-5E0 F20456 and up

GENERAL PRECAUTIONS:

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 op- erating 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 or making any repairs, park the machine on hard, level ground, and block the wheels to
prevent the machine from moving.
8. Before starting work, lower outrigger, bucket or any other work equipment to the ground. If this is not possible,
use blocks to prevent the work equipment from falling down. In addition, be sure to lock all the control levers and hang warning sign 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.

TABLE OF CONTENTS:

Komatsu Backhoe-Loader WB93S-5E0 Shop Manual WEBM008302 – PDF DOWNLOAD

CONTENTS………………………………………………………………………………………. 3
SAFETY………………………………………………………………………………………… 5
FOREWORD………………………………………………………………………………………. 7
HOW TO READ THE SHOP MANUAL……………………………………………………………………… 8
HOISTING INSTRUCTIONS…………………………………………………………………………… 9
STANDARD TIGHTENING TORQUE………………………………………………………………………. 10
COATING MATERIALS………………………………………………………………………………. 12
ELECTRIC………………………………………………………………………………………. 13
WEIGHT TABLE…………………………………………………………………………………… 14
TABLE OF OIL AND COOLANT QUANTITIES………………………………………………………………. 15
CONVERSION TABLE……………………………………………………………………………….. 17
POWER TRAIN……………………………………………………………………………………. 26
10 STRUCTURE AND FUNCTION……………………………………………………………………….. 25
TRANSMISSION (4WD)………………………………………………………………………….. 28
TRANSMISSION……………………………………………………………………………….. 30
DRIVE SHAFTS……………………………………………………………………………….. 33
CONTROL VALVE BLOCK…………………………………………………………………………. 35
FRONT AXLE…………………………………………………………………………………. 36
REAR AXLE………………………………………………………………………………….. 39
STEERING SYSTEM (4WS)……………………………………………………………………….. 43
HYDRAULIC PUMP……………………………………………………………………………… 47
8-SPOOL CONTROL VALVE (WITH MECHANICAL CONTROL)………………………………………………… 61
10-SPOOL CONTROL VALVE (WITH MECHANICAL CONTROL)……………………………………………….. 67
8-SPOOL CONTROL VALVE (WITH SERVOCONTROL)……………………………………………………… 76
10-SPOOL CONTROL VALVE (WITH SERVOCONTROL)…………………………………………………….. 84
CLSS………………………………………………………………………………………. 93
STEERING UNIT……………………………………………………………………………….118
PPC VALVES………………………………………………………………………………….119
PPC VALVE (BACKHOE CONTROLS)………………………………………………………………….134
SOLENOID VALVE GROUP (EV1)……………………………………………………………………140
SOLENOID VALVE GROUP (EV2)……………………………………………………………………143
HAMMER AND JIG ARM SOLENOID VALVE……………………………………………………………..144
HAMMER SOLENOID VALVE………………………………………………………………………..145
JIG ARM SOLENOID VALVE……………………………………………………………………….146
JIG ARM AND SIDE DIGGING BOOM SOLENOID VALVE……………………………………………………147
JIG ARM AND 2-WAY ATTACHMENT SOLENOID VALVE…………………………………………………….148
SIDE DIGGING BOOM SOLENOID VALVE………………………………………………………………149
2-WAY ATTACHMENT SOLENOID VALVE……………………………………………………………….150
SAFETY VALVES……………………………………………………………………………….151
SHOVEL CYLINDERS…………………………………………………………………………….155
BACKHOE CYLINDERS……………………………………………………………………………157
AIR-CONDITIONING UNIT………………………………………………………………………..161
OPERATION OF THE AIR CONDITIONING UNIT…………………………………………………………162
20 TESTING AND ADJUSTMENTS……………………………………………………………………….163
NORMAL OR STANDARD TECHNICAL DATA……………………………………………………………..164
SPECIAL TOOLS……………………………………………………………………………….188
VALVE CLEARANCE ADJUSTING…………………………………………………………………….189
ENGINE SPEED TESTS…………………………………………………………………………..190
TENSIONING THE AIR-CONDITIONING COMPRESSOR BELT…………………………………………………191
BLEEDING AIR FROM CIRCUITS – ELIMINATING RESIDUAL PRESSURE……………………………………….192
ADJUSTING ACCELERATOR PEDAL TRAVEL AND ACCELERATOR LEVER…………………………………………194
ADJUSTING BRAKE PEDAL SLACK/ALIGNMENT………………………………………………………….196
BRAKING SYSTEM CHECKS………………………………………………………………………..197
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…………………………………………..206
CHECKING AND ADJUSTING THE LS DIFFERENTIAL PRESSURE – ADJUSTING THE LS VALVE……………………….208
CHECKING AND ADJUSTING SERVOCONTROLS SUPPLY PRESSURE…………………………………………….209
ADJUSTING THE PC VALVE……………………………………………………………………….210
TESTING AND SETTING STEERING CONTROL SYSTEM PRESSURE…………………………………………….211
CHECKING FOR LEAKS IN THE STEERING CYLINDERS……………………………………………………212
TESTING PRESSURES IN THE POWER TRAIN GROUP……………………………………………………..213
TESTING THE CORRECT FUNCTIONING OF THE POWER TRAINCLUTCHES……………………………………….214
ANALYSIS OF CAUSES HYDRAULIC DRIFT…………………………………………………………….215
JIG ARM CLEARANCE ADJUSTMENT………………………………………………………………….220
TESTING THE AIR-CONDITIONING UNIT……………………………………………………………..222
EMPTYING THE AIR-CONDITIONING UNIT…………………………………………………………….224
TROUBLESHOOTING……………………………………………………………………………..225
30 REMOVAL AND INSTALLATION………………………………………………………………………239
HOW TO READ THE MANUAL……………………………………………………………………….240
PRECAUTIONS TO BE TAKEN WHILE WORKING………………………………………………………….241
SPECIAL TOOLS……………………………………………………………………………….242
ENGINE HOOD…………………………………………………………………………………246
FRONT GUARD…………………………………………………………………………………247
RADIATOR GROUP – INTERCOOLER………………………………………………………………….248
INTERCOOLER…………………………………………………………………………………251
CONDENSER (For machines equipped with an air-conditioning unit)…………………………………..253
EXHAUST PIPE………………………………………………………………………………..254
MUFFLER…………………………………………………………………………………….255
AIR FILTER………………………………………………………………………………….256
ENGINE BELT…………………………………………………………………………………257
TURBOCHARGER………………………………………………………………………………..258
AIR-CONDITIONING UNIT COMPRESSOR………………………………………………………………259
AIR-CONDITIONING UNIT COMPRESSOR BELT………………………………………………………….261
FAN AND HEATING GROUP………………………………………………………………………..262
BATTERY…………………………………………………………………………………….267
FUEL TANK…………………………………………………………………………………..268
STEERING WHEEL AND TRANSMISSION-REVERSE, DIRECTION INDICATOR AND HEADLIGHT DIPPER BEAM CONTROL GROUP….269
WORKING BRAKE PUMP GROUP……………………………………………………………………..271
STEERING UNIT……………………………………………………………………………….274
CAB………………………………………………………………………………………..276
HYDRAULIC OIL TANK…………………………………………………………………………..282
HYDRAULIC PUMP………………………………………………………………………………287
TRANSMISSION………………………………………………………………………………..289
CONVERTOR…………………………………………………………………………………..365
ENGINE……………………………………………………………………………………..366
CONTROL VALVE (Standard version)………………………………………………………………369
CONTROL VALVE (version with servocontrol)………………………………………………………372
STEERING SOLENOID VALVE GROUP…………………………………………………………………375
FRONT AXLE………………………………………………………………………………….376
REAR AXLE…………………………………………………………………………………..415
SHOVEL PPC VALVE…………………………………………………………………………….467
SHOVEL LIFT CYLINDERS………………………………………………………………………..469
SHOVEL DUMP CYLINDERS………………………………………………………………………..471
SHOVEL……………………………………………………………………………………..473
FRONT WORKING EQUIPMENT………………………………………………………………………474
BACKHOE PPC VALVES (Optional)…………………………………………………………………476
PPC VALVE SUPPORT RELEASE CABLES………………………………………………………………478
PPC VALVE SUPPORT RETURN GAS SPRING……………………………………………………………480
SOLENOID VALVE GROUP (servocontrol and optional attachment)………………………………………482
BACKHOE BOOM CYLINDER………………………………………………………………………..483
ARM CYLINDER………………………………………………………………………………..485
JIG ARM CYLINDER…………………………………………………………………………….487
OUTRIGGER CYLINDER…………………………………………………………………………..488
BACKHOE SWING CYLINDERS………………………………………………………………………490
BACKHOE BUCKET CYLINDER………………………………………………………………………492
BACKHOE BOOM SAFETY CYLINDER………………………………………………………………….494
CYLINDER……………………………………………………………………………………495
BACKHOE WORKING EQUIPMENT…………………………………………………………………….503
BACKHOE BUCKET………………………………………………………………………………505
BACKHOE BOOM CYLINDER………………………………………………………………………..506
ARM………………………………………………………………………………………..507
JIG ARM…………………………………………………………………………………….509
2nd ARM…………………………………………………………………………………….510
2nd ARM GUIDES………………………………………………………………………………511
BACKHOE SWING BRACKET………………………………………………………………………..512
COMPLETE BACKHOE BACKFRAME……………………………………………………………………513
BACKFRAME LOCK PISTONS……………………………………………………………………….515
40 STANDARD MAINTENANCE………………………………………………………………………….517
EXPLANATION OF TERMS FOR MAINTENANCE STANDARD…………………………………………………..518
TRANSMISSION………………………………………………………………………………..520
FRONT AXLE………………………………………………………………………………….525
REAR AXLE…………………………………………………………………………………..528
HYDRAULIC PUMP………………………………………………………………………………532
CONTROL VALVE……………………………………………………………………………….534
PPC VALVES………………………………………………………………………………….567
SHOVEL CYLINDERS…………………………………………………………………………….569
BACKHOE CYLINDERS……………………………………………………………………………571
FRONT WORKING EQUIPMENT………………………………………………………………………574
SWING BRACKET……………………………………………………………………………….576
BACKHOE WORKING EQUIPMENT…………………………………………………………………….578
90 DIAGRAMS AND DRAWINGS…………………………………………………………………………581
HYDRAULIC CIRCUIT DIAGRAM (MECHANICAL VERSION) – UP TO S/N F20723…………………………………583
HYDRAULIC CIRCUIT DIAGRAM (MECHANICAL VERSION) – FROM S/N F20724 TO F21521…………………………585
HYDRAULIC CIRCUIT DIAGRAM (MECHANICAL VERSION) – FROM S/N F21522 AND UP……………………………587
HYDRAULIC CIRCUIT DIAGRAM (MECHANICAL VERSION) – OPTIONAL………………………………………..589
HYDRAULIC CIRCUIT DIAGRAM (VERSION WITH SERVOCONTROL) – UP TO S/N F20723…………………………..591
HYDRAULIC CIRCUIT DIAGRAM (VERSION WITH SERVOCONTROL) – FROM S/N F20724 TO F20920…………………..593
HYDRAULIC CIRCUIT DIAGRAM (VERSION WITH SERVOCONTROL) – FROM S/N F20921 TO F21521…………………..595
HYDRAULIC CIRCUIT DIAGRAM (VERSION WITH SERVOCONTROL) – FROM S/N F21522 AND UP……………………..597
HYDRAULIC CIRCUIT DIAGRAM (VERSION WITH SERVOCONTROL) – OPTIONAL………………………………….599
HYDRAULIC CIRCUIT DIAGRAM – STEERING…………………………………………………………..601
ELECTRICAL CIRCUIT DIAGRAM (1/3)………………………………………………………………603
ELECTRICAL CIRCUIT DIAGRAM (2/3)………………………………………………………………605
ELECTRICAL CIRCUIT DIAGRAM (3/3)………………………………………………………………607