Komatsu WB140-2N, WB150-2N Backhoe Loader Shop Manual – CEBM012700

This complete service repair workshop manual PDF download for the Komatsu WB140-2N & WB150-2N Backhoe Loader has easy to read text sections with top quality diagrams, pictures and illustrations. The step by step instructions show you how to fault find or complete any repair or overhaul, correctly and efficiently, saving time and avoiding costly mistakes. All specifications and tolerances are listed. Functions of components and systems are also explained.

APPLICABLE MODELS :

Komatsu WB140-2N – SN: A20637 and up
Komatsu WB150-2N – SN: A60029 and up

TABLE OF CONTENTS :

– GENERAL
– STRUCTURE AND FUNCTION
– MAINTENANCE STANDARD
– TESTING AND ADJUSTING
– OTHERS

MANUAL SPECIFICATION :

File Format : PDF
Language : English
Printable : Yes
Searchable : Yes
Bookmarked : Yes
Product Code : CEBM012700
Total Pages : 324

This service repair workshop manual PDF download contains specs, diagrams, actual real photo illustrations, and schemes. In addition to space savings, nice thing about having completly searcheble PDF files instead of a hard-printed manual is that you can use the Search feature in your PDF reader software (Adobe Acrobat) to find just what your looking for and just print out the exact pages you need or all manual easily. This is the same Repair Service manual your local dealer will use when doing a repair.

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COVER
CONTENTS
FOREWORD
SAFETY
SAFETY NOTICE
IMPORTANT SAFETY NOTICE
GENERAL PRECAUTIONS
PREPARATIONS FOR WORK
PRECAUTIONS DURING WORK
GENERAL
HOW TO READ THE SHOP MANUAL
VOLUMES
DISTRIBUTION AND UPDATING
FILING METHOD
REVISED EDITION MARK
REVISIONS
SYMBOLS
HOISTING INSTRUCTIONS
HOISTING
WIRE ROPES
PUSH PULL COUPLER
TYPE 1
DISCONNECTION
CONNECTION
TYPE 2
DISCONNECTION
CONNECTION
TYPE 3
DISCONNECTION
CONNECTION
COATING MATERIALS
STANDARD TIGHTENING TORQUE
STANDARD TIGHTENING TORQUE OF BOLTS AND NUTS
TIGHTENING TORQUE OF HOSE NUTS
TIGHTENING TORQUE OF SPLIT FLANGE BOLTS
TIGHTENING TORQUE FOR FLARED NUTS
TABLE OF TIGHTENING TORQUES FOR O-RING BOSS PIPING JOINTS
TABLE OF TIGHTENING TORQUES FOR O-RING BOSS PLUGS
TIGHTENING TORQUE TABLE FOR HOSES (TAPER SEAL TYPE AND FACE SEAL TYPE)
ELECTRIC WIRE CODE
CLASSIFICATION BY THICKNESS
CLASSIFICATION BY COLOR AND CODE
CONVERSION TABLES
METHOD OF USING THE CONVERSION TABLE

01 GENERAL
SPECIFICATIONS
WEIGHT TABLE
FUEL COOLANT AND LUBRICANTS

10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
ENGINE MOUNTING
TIER I ENGINE
4WD MACHINES
2WD MACHINES
TIER II ENGINE
4WD MACHINES
2WD MACHINE
POWER TRAIN
4WD MACHINES
DESCRIPTION
POWER FLOW – 4WD
2WD MACHINES
DESCRIPTION
TRANSMISSION DIAGRAM
4WD MACHINES
2WD MACHINES
TRANSMISSION
COMPLETE ASSEMBLY
FORWARD REVERSE CLUTCH
1ST THROUGH 4TH SPEED SHAFT
4WD SHAFT
FRONT AXLE
4WD
COMPLETE ASSEMBLY
DIFFERENTIAL
PLANETARY
2WD
COMPLETE ASSEMBLY
CENTER HOUSING
STEERING KNUCKLE
REAR AXLE
COMPLETE ASSEMBLY
DIFFERENTIAL
PLANETARY
BRAKES
DIFFERENTIAL LOCK
HYDRAULIC PUMP
FUNCTION
STRUCTURE
OPERATION
PUMP OPERATION
CONTROL OF DELIVERY
PC VALVE, LS VALVE, SERVO PISTON
LS VALVE FUNCTION
OPERATION
PC VALVE FUNCTION
WORKING MODE SOLENOID VALVE
STEERING UNIT
TECHNICAL DATA
OPERATION
LOADER VALVE
2 SPOOL
3 SPOOL VALVE
BACKHOE CONTROL VALVE
MECHANICAL CONTROL
INLET SECTION VIEWS A-A AND B-B
ARM SECTION VIEW C-C
SWING SECTION VIEW D-D
LEFT OUTRIGGER SECTION VIEW E-E
RIGHT OUTRIGGER SECTION VIEW F-F
BUCKET SECTION VIEW G-G
BOOM SECTION VIEW H-H
OUTLET SECTION VIEW J-J
TELESCOPIC ARM SECTION VIEW K-K
HAMMER SECTION VIEW L-L
EXCAVATOR CONTROL
INLET SECTION VIEWS A-A AND B-B
ARM SECTION VIEW C-C
SWING SECTION VIEW D-D
LEFT OUTRIGGER SECTION ˜ VIEW E-E
RIGHT OUTRIGGER SECTION VIEW F-F
BUCKET SECTION VIEW G-G
BOOM SECTION VIEW H-H
OUTLET SECTION VIEW J-J
TELESCOPIC ARM SECTION VIEW K-K
HAMMER SECTION VIEW L-L
CLSS
CHARACTERISTICS
STRUCTURE
OPERATING PRINCIPLES
UNLOADING VALVE
FUNCTION
OPERATION
INTRODUCTION OF THE LS PRESSURE
OPERATION
DELIVERY COMPENSATION
INTRODUCTION
OPERATION
LIFD CONTROL SYSTEM
FUNCTION
OPERATION
LS DECOMPRESSION VALVE
DESCRIPTION
OPERATION
PRESSURE CUT OFF VALVE
DESCRIPTION
OPERATION
PRIORITY VALVE
FUNCTION
PPC JOYSTICK
LEFT VALVE
RIGHT VALVE
SOLENOID VALVE
DIFFERENTIAL LOCK – BACKHOE BOOM LOCK
PPC SUPPLY VALVE – ST2
PPC TELESCOPIC ARM
PPC HAMMER
PPC ARM AND HAMMER
LOADER CYLINDERS
BOOM ARM
CHARACTERISTICS
BUCKET
CHARACTERISTICS
MP BUCKET
CHARACTERISTICS
BACKHOE CYLINDERS
BOOM
CHARACTERISTICS
ARM
CHARACTERISTICS
BUCKET
CHARACTERISTICS
TELESCOPIC ARM CYLINDER
CHARACTERISTICS
SWING
CHARACTERISTICS
OUTRIGGER
CHARACTERISTICS
BOOM LOCK CYLINDER
FRONT WORK EQUIPMENT
REAR WORK EQUIPMENT
AIR CONDITIONING

20 TESTING, ADJUSTING AND TROUBLESHOOTING
STANDARD VALUE TABLES FOR ENGINE
STANDARD VALUE TABLES FOR CHASSIS
SPECIAL TOOLS
ENGINE SPEED
TIER I ENGINE
TIER II ENGINE
VALVE CLEARANCE
TIER I ENGINE
ADJUSTING PROCEDURE
VALVE COVER INSTALLATION
TIER II ENGINE
ADJUSTING PROCEDURE
COMPRESSION PRESSURE
TIER I ENGINE
TIER II ENGINE
FUEL INJECTION TIMING
TIER I ENGINE
TIER II ENGINE
FAN BELT
TENSION CHECK
TENSION ADJUSTMENT
COMPRESSOR DRIVE BELT
CHECKING TENSION
TENSION ADJUSTMENT
ACCELERATOR PEDAL AND LEVER
ACCELERATOR PEDAL TRAVEL
ACCELERATOR LEVER TRAVEL
BRAKE PEDAL TRAVEL
TIER I ENGINE
MASTER CYLINDER ROD ADJUSTMENT
MICROSWITCHES ADJUSTMENT
CHECKING ADJUSTMENT
TIER II ENGINE
MASTER CYLINDER ROD
CHECKING ADJUSTMENT
BLEEDING AIR
HYDRAULIC PUMP
CYLINDERS
HYDRAULIC OIL TANK
HYDRAULIC OIL TANK PRESSURIZATION
WORK CIRCUITS
BRAKE CIRCUIT
CHECK BRAKE CIRCUIT
HYDRAULIC CIRCUIT
INTRODUCTION
LOADER CONTROL VALVES
BACKHOE CONTROLS STYLE VALVE
EXCAVATOR CONTROLS STYLE VALVE
MAIN RELIEF VALVES
TESTING
LOADER CONTROL VALVE (2 OR 3 SPOOL)
BACKHOE CONTROL VALVE (6, 7 OR 8 SPOOLS)
SETTING RELIEF PRESSURE
LOADER CIRCUIT RELIEF VALVES
TESTING PRESSURE
SETTING PRESSURE
BACKHOE CIRCUIT RELIEF VALVES
TESTING PRESSURE
SETTING PRESSURE
UNLOADING VALVE
TESTING
ADJUSTMENT
LOAD SENSING (LS) VALVE
TESTING
ADJUSTMENT
FLOW VALVE
PRIORITY VALVE
TESTING
CLEANING PRIORITY VALVE
STEERING SYSTEM
TESTING
SETTING
BRAKE SYSTEM
CIRCUIT AND BRAKE PUMP TEST
BRAKING GROUP LEAK TEST
ENGINE SPEED UNDER LOAD
PREPARING THE MACHINE
TORQUE CONVERTER STALL
TORQUE CONVERTER AND HYDRAULIC STALL
POWER TRAIN GROUP
PREPARING THE MACHINE
CONVERTER OIL PRESSURE
CLUTCH PRESSURE
ADDITIONAL PRESSURES
DIRECTIONAL CLUTCHES
PREPARATION OF THE MACHINE
TESTING
RETURN TO DIG DEVICE
HYDRAULIC DRIFT
LOADER
LIFT CYLINDER
BUCKET CYLINDER
BACKHOE
BOOM CYLINDER
ARM CYLINDER
BUCKET CYLINDER
OUTRIGGER TESTING
AIR CONDITIONING UNIT
TESTING THE WORKING TEMPERATURE
CHECKING THE UNIT
EMPTYING THE AC UNIT
TROUBLESHOOTING GUIDE
FRONT AXLE
REAR AXLE
TRANSMISSION

90 OTHERS
HYDRAULIC CIRCUIT
STANDARD CONTROLS FOR WB140-2N SHEET 1 OF 2
STANDARD CONTROLS FOR WB140-2N SHEET 2 OF 2
STANDARD CONTROLS FOR WB150-2N SHEET 1 OF 2
STANDARD CONTROLS FOR WB150-2N SHEET 2 OF 2
PPC SYSTEM FOR WB140-2N SHEET 1 OF 3
PPC SYSTEM FOR WB140-2N SHEET 2 OF 3
PPC SYSTEM FOR WB140-2N SHEET 3 OF 3
PPC SYSTEM FOR WB150-2N SHEET 1 OF 3
PPC SYSTEM FOR WB150-2N SHEET 2 OF 3
PPC SYSTEM FOR WB150-2N SHEET 3 OF 3
ELECTRICAL
CAB WIRING SCHEMATIC SHEET 1 OF 5
CAB WIRING SCHEMATIC SHEET 2 OF 5
CAB WIRING SCHEMATIC SHEET 3 OF 5
CAB WIRING SCHEMATIC SHEET 4 OF 5
CAB WIRING SCHEMATIC SHEET 5 OF 5
LEGEND FOR CAB WIRING SCHEMATIC
CANOPY WIRING SCHEMATIC SHEET 1 OF 5
CANOPY WIRING SCHEMATIC SHEET 2 OF 5
CANOPY WIRING SCHEMATIC SHEET 3 OF 5
CANOPY WIRING SCHEMATIC SHEET 4 OF 5
CANOPY WIRING SCHEMATIC SHEET 5 OF 5
LEGEND FOR CANOPY WIRING SCHEMATIC
TIER I ENGINE HARNESS
TIER II ENGINE HARNESS
LEGEND FOR TIER I AND II ENGINE HARNESSES
FRONT HARNESS
LEGEND FOR FRONT HARNESS
LATERAL HARNESS AND SIDE DASHBOARD
TIER I ENGINE SHEET 2 OF 2
LEGEND FOR TIER I ENGINE LATERAL AND SIDE DASH BOARD HARNESS
TIER II ENGINE SHEET 1 OF 2
TIER II ENGINE SHEET 2 OF 2
LEGEND FOR TIER II ENGINE LATERAL SIDE DASH BOARD HARNESS
PPC FRAME AND SIDE DASH BOARD HARNESS
SIDE DASH BOARD HARNESS
LEGEND FOR PPC FRAME AND SIDE DASH BOARD HARNESS
WORK LIGHT HARNESS
FUSE AND RELAY PANEL
LEGEND FOR FUSE AND RELAY PANEL

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