Komatsu WB140-2N, WB150-2N with S4D106-1 Engine Backhoe Loader Service Manual
661 pages · Publication CEBM012701
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- Models
- WB140-2N, WB150-2N with S4D106-1 Engine
- Serial coverage
- WB140-2N A20637 and up, WB150-2N A60029 and up
- Manual type
- Service Manual
- Pages
- 661
- Publication
- CEBM012701
- Condition
- Brand new
What's inside
From the manual's own table of contents: 4 sections, 154 entries. See sample pages (PDF, 763 KB)
FOREWORD68 topics
- 12CONTENTS
- GENERAL
- STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
- TESTING, ADJUSTING AND TROUBLESHOOTING
- DISASSEMBLY AND ASSEMBLY
- OTHER
- 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
- LOADER VALVE
- SPOOL
- 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
- LEFT OUTRIGGER SECTION ˜ VIEW E-E
- CLSS
- CHARACTERISTICS
- STRUCTURE
- OPERATING PRINCIPLES
- UNLOADING VALVE
- FUNCTION
- INTRODUCTION OF THE LS PRESSURE
- DELIVERY COMPENSATION
- INTRODUCTION
- LIFD CONTROL SYSTEM
- LS DECOMPRESSION VALVE
- DESCRIPTION
- PRESSURE CUT OFF VALVE
- PRIORITY VALVE
- 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
- BUCKET
- MP BUCKET
- BACKHOE CYLINDERS
- BOOM
- TELESCOPIC ARM CYLINDER
- SWING
- OUTRIGGER
- BOOM LOCK CYLINDER
- FRONT WORK EQUIPMENT
- REAR WORK EQUIPMENT
- AIR CONDITIONING
TESTING AND ADJUSTING52 topics
- WORK CIRCUITS
- BRAKE CIRCUIT
- CHECK BRAKE CIRCUIT
- HYDRAULIC CIRCUIT
- 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
- ADJUSTMENT
- LOAD SENSING (LS) VALVE
- FLOW VALVE
- CLEANING PRIORITY VALVE
- STEERING SYSTEM
- 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
- CONVERTER OIL PRESSURE
- CLUTCH PRESSURE
- ADDITIONAL PRESSURES
- DIRECTIONAL CLUTCHES
- PREPARATION OF THE MACHINE
- RETURN TO DIG DEVICE
- HYDRAULIC DRIFT
- LOADER
- LIFT CYLINDER
- BUCKET CYLINDER
- BACKHOE
- BOOM CYLINDER
- ARM CYLINDER
- OUTRIGGER TESTING
- AIR CONDITIONING UNIT
- TESTING THE WORKING TEMPERATURE
- CHECKING THE UNIT
- EMPTYING THE AC UNIT
- TROUBLESHOOTING GUIDE
- FRONT AXLE
- REAR AXLE
- TRANSMISSION
REMOVAL AND INSTALLATION26 topics
- REMOVAL
- INSTALLATION
- MASTER BRAKE CYLINDER
- LOADER CONTROL VALVE
- 2WD FRONT AXLE
- DISASSEMBLY
- 4WD FRONT AXLE
- REASSEMBLY
- MP BUCKET CYLINDER
- FRONT EQUIPMENT
- BACKHOE CONTROL
- EXCAVATOR CONTROLS
- PPC CONTROLS
- PPC VALVE
- SUPPORT RELEASE CABLES
- SUPPORT RETURN GAS SPRING
- SERVO CONTROL FEED VALVE
- TELESCOPIC ARM
- OUTRIGGERS
- BOOM LOCK
- BACKHOE WORK EQUIPMENT
- BOOM TO BUCKET
- STANDARD ARM
- INNER ARM
- INNER ARM GUIDES
- SWING BRACKET
OTHERS4 topics
- LEGEND FOR PPC FRAME AND SIDE DASH BOARD HARNESS
- WORK LIGHT HARNESS
- FUSE AND RELAY PANEL
- LEGEND FOR FUSE AND RELAY PANEL
Inside this manual
Real pages from this service manual (661 pages). Open the sample pages (PDF, 763 KB)
- Troubleshooting, page 239: TESTING AND ADJUSTING
- Specifications, page 299: COUNTERWEIGHT
- Diagram, page 599: OTHERS
- Foldout diagram, page 616: OTHERS
Other manuals for this machine
Save 10% on 2 manuals, 15% on 3 or more. Other manuals for the WB140-2N are listed below. Editions cover different serial number ranges: check the serial coverage and tick only the ones that match your machine.
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This is a service manual
Here's how it compares to the other manual types.
Service manual
Factory repair procedures and technical information such as specifications, troubleshooting, and wiring and hydraulic diagrams, for the models and systems the manual covers. See What's inside for its topics.
Operator's manual
Safe operation, controls, maintenance schedules, lubrication points, inspections, and basic checks. Repair procedures are in the service manual.
Parts manual
Illustrated diagrams with factory part numbers for identifying components and ordering parts. Repair procedures are in the service manual.
Engine service manuals are sometimes sold separately, since certain machine models were offered with more than one engine option.
What it's used for
Factory manual for in-house farm and construction shop use. Straightforward, complete, and easy to follow. It contains the OEM information dealership service departments and parts counters use to diagnose problems, identify components, and perform maintenance or repairs correctly.
Service shops and owner/operators who repair their own equipment
Identifying correct parts and seeing how assemblies come apart and go back together
Keeping equipment running with less downtime
Factory manual, 661 pages
Quantity one is the manual described above.
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Ships in 1 business day.
60-day returns
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Binder not included
Manuals over about 300 pages may need a standard 3-ring binder, which you can buy locally to keep the pages organized for shop use.
Other editions and similar models
Questions about model, serial number, engine coverage or contents? Contact us before purchasing and we'll help confirm it's the right manual. Please verify the manual type, machine model, serial number range and engine coverage before purchasing: manuals ordered in error carry a 20% restocking fee (return policy).