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Komatsu Backhoe Loader WB91R-2, WB93R-2 Workshop Service Manual
Original factory manuals for Komatsu Loaders, Dozers, Excavators contains high quality images, circuit diagrams and instructions to help you to operate, maintenance and repair your truck. All Manuals Printable, contains Searchable Text and Navigation Bookmarks
Covered models:
WB91R-2 sn: 91F20145 and up
WB93R-2 sn: 93F23453 and up
Format: PDF, 504 Pages
Language: English
Contents:
10 STRUCTURE AND FUNCTION
Power train
Transmission (4WD)
Drive shafts
Control valve block
Front axle
Rear axle
Hydraulic pump
Steering unit
Hydraulic circuit
Shovel control valve
Backhoe control valve
CLSS
Solenoid valve
Safety valve
Brake pump
Shovel cylinder
Backhoe cylinder
Air-conditioning unit
How the air-conditioning unit functions
Electrical diagram (1/6)
Electrical diagram (2/6)
Electrical diagram (3/6)
Electrical diagram (4/6)
Electrical diagram (5/6)
Electrical diagram (6/6)
Electrical diagram (Air conditioning)
20 TESTING AND ADJUSTING
Normal or standard technical data
Special tools
Measuring engine speed
Adjusting valve clearance
Measuring compression pressure
Testing and adjusting fuel injection timing
Checking and tightening the fan - belt
Checking and tightening the compressor fan - belt
Measuring accelerator pedal operating travel and accelerator lever
Adjusting brake pedal travel, brake alignment, microswitches
Air bleeding - releasing residual pressure
Checking and setting pressure in the attachments
hydraulic circuit
Testing and adjusting of load sensing signal (LS valve)
Testing and adjusting of unloading valve
Checking unloading valve functionality
Testing priority valve operation
Testing and setting steering control system pressure
Testing brake system
Control of the engine speed under load
Testing pressures in the power train group
Testing the correct functioning of the power train clutches
Adjusting the sensor for return to dig device
Analysis of causes hydraulic drift
Testing the air-conditioning unit
Emptying the air-conditioning unit
Troubleshooting
30 DISASSEMBLY AND ASSEMBLY
HOW TO READ THE MANUAL...............................
PRECAUTIONS TO BE TAKEN WHILE WORKING
SPECIAL TOOLS ....................................................
STARTING MOTOR
Removal and installation .........................................
ALTERNATOR
AIR-CONDITIONING UNIT COMPRESSOR
INJECTION PUMP
INJECTION NOZZLES
THERMOSTAT
COOLING LIQUID PUMP
TURBOCOMPRESSOR
CYLINDER HEAD
FRONT COUNTERWEIGHT
RADIATOR GROUP
CONDENSER
MUFFLER
EXHAUST PIPE
ENGINE HOOD
CAB
HEAT AND AIR-CONDITIONING GROUP
FUEL TANK
HYDRAULIC OIL TANK
ENGINE-GEARBOX-PUMP GROUP
PISTON PUMP
TRANSMISSION
CONVERTOR
TRANSMISSION-REVERSE, DIRECTION
INDICATOR AND HEADLIGHT DIPPER BEAM
CONTROL GROUP
STEERING UNIT
WORKING BRAKE PUMP GROUP
FRONT WORKING EQUIPMENT CONTROL VALVE
FRONT AND BACKOHE CONTROL VALVE
FRONT AXLE
REAR AXLE
FRONT BUCKET BOOM-RAISING CYLINDER
FRONT BUCKET TILT CYLINDERS
FRONT BUCKET
FRONT WORKING EQUIPMENT
BACKHOE CONTROL VALVE
BACKHOE BOOM CYLINDER
BACKHOE ARM CYLINDER
JIG ARM CYLINDER
BACKHOE BUCKET CYLINDER
OUTRIGGER CYLINDERS
BACKHOE SWING CYLINDERS
BACKHOE BACKFRAME LOCK CYLINDER
CYLINDERS (Front bucket raise and tilt, boom, arm, bucket, outriggers and telescopic arm)
BOOM SWING CYLINDER
BACKHOE BACKFRAME LOCK CYLINDER
BOOM SAFETY CYLINDER
BACKHOE WORKING EQUIPMENT
BACKHOE BUCKET
ARM
JIG ARM
2nd ARM
2nd ARM GUIDES
BACKHOE BOOM
BACKHOE SWING BRACKET
BACKHOE BACKFRAME
40 MAINTENANCE STANDARD.
Transmission
Front axle
Rear axle
Hydraulic pump
2-Spool control valve
3-Spool control valve
3-Spool control valve (With Return to Dig)
6-Spool control valve
7-Spool control valve
8-Spool control valve
Brake pump
Shovel cylinders
Backhoe cylinders
Front working equipment
Swing bracket
Backhoe working equipment .
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