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KOMATSU WB70A-1 BACKHOE LOADER SERVICE REPAIR MANUAL (SN:F10392 & UP) KOMATSU WB70A-1 – PDF DOWNLOAD
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- KOMATSU WB70A-1 BACKHOE LOADER SERVICE REPAIR MANUAL
- SERIAL NUMBER:F10392 & UP
- PUBLICATION NUMBER:WEBM003200
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Description
KOMATSU WB70A-1 BACKHOE LOADER SERVICE REPAIR MANUAL (SN:F10392 & UP) KOMATSU WB70A-1
KOMATSU WB70A-1 BACKHOE LOADER SERVICE REPAIR MANUAL (SN:F10392 & UP) KOMATSU WB70A-1 – PDF DOWNLOAD:
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TABLE OF CONTENTS:
KOMATSU WB70A-1 BACKHOE LOADER SERVICE REPAIR MANUAL (SN:F10392 & UP) KOMATSU WB70A-1
COVER....................................................................................... 1 CONTENTS................................................................................ 3 LIST OF REVISED PAGES................................................................... 5 SAFETY.................................................................................. 7 FOREWORD................................................................................ 9 HOW TO READ THE SHOP MANUAL............................................................. 10 HOISTING INSTRUCTIONS................................................................... 11 STANDARD TIGHTENING TORQUE.............................................................. 12 COATING MATERIALS....................................................................... 14 ELECTRIC WIRE CODE...................................................................... 15 WEIGHT TABLE............................................................................ 16 TABLE OF OIL AND COOLANT QUANTITIES..................................................... 17 10. STRUCTURE AND FUNCTION.............................................................. 21 P.T.O............................................................................... 22 POWER TRAIN......................................................................... 23 TRANSMISSION........................................................................ 24 AXLES............................................................................... 26 HYDROSTATIC TRANSMISSION............................................................ 32 HYDROSTATIC TRANSMISSION PUMP....................................................... 34 INCHING VALVE....................................................................... 42 TRAVEL MOTOR........................................................................ 43 STEERING SYSTEM..................................................................... 48 STEERING SYSTEM PUMP................................................................ 49 STEERING UNIT....................................................................... 50 PRIORITY VALVE...................................................................... 51 FRAMES KNUCKLE AND JOINT............................................................ 52 HYDRAULIC CIRCUIT DIAGRAM........................................................... 53 3-SPOOL CONTROL VALVE............................................................... 55 6-SPOOL CONTROL VALVE............................................................... 56 7- SPOOL CONTROL VALVE.............................................................. 58 VALVES.............................................................................. 60 GEAR PUMP........................................................................... 62 OUTRIGGER SAFETY VALVES............................................................. 63 BRAKE PUMP.......................................................................... 64 FRONT EQUIPMENT CYLINDER............................................................ 66 FRONT WORK EQUIPMENT................................................................ 68 LOADER CONTROL LEVER................................................................ 69 BACKHOE CYLINDER.................................................................... 70 BACKHOE WORK EQUIPMENT.............................................................. 74 BACKOHE CONTROL LEVER............................................................... 75 SOLENOID VALVE...................................................................... 76 ELECTRIC DIAGRAM.................................................................... 77 20. TESTING AND ADJUSTMENTS............................................................. 89 NORMAL OR STANDARD TECHNICAL DATA................................................... 90 SPECIAL TOOLS.......................................................................104 MEASURING ENGINE SPEED..............................................................105 ADJUSTING VALVE CLEARANCE...........................................................106 MEASURING COMPRESSION PRESSURE......................................................107 TESTING AND ADJUSTING FUEL INJECTION TIMING.........................................108 CHECKING AND TIGHTENING THE FAN - BELT..............................................109 MEASURING ACCELERATOR PEDAL OPERATING FORCE AND ACCELERATION LEVER..................110 ADJUSTING INCH PEDAL TRAVEL.........................................................111 ADJUSTING BRAKE PEDAL TRAVEL........................................................112 TESTING FRAME ARTICULTATION CLEARANCE...............................................113 AIR BLEEDING - RELEASING RESIDUAL PRESSURE..........................................114 CHECKING AND SETTING PRESSURE IN THE ATTACHMENTS HYDRAULIC CIRCUIT..................118 TESTING AND ADJUSTING HYDROSTATIC TRANSMISSION......................................122 TESTING AND ADJUSTING TRAVEL MAXIMUM SPEED (UNIERSAL JOINT).........................128 TESTING TRAVEL MOTOR LEAKEAGE.......................................................129 ADJUSTING TRANSMISSION SENSOR.......................................................130 TESTING PRIORITY VALVE OPERATION....................................................131 TESTING AND SETTING STEERING CONTROL SYSTEM PRESSURE................................132 TESTING STEERING CYLINDER LEAKAGE...................................................133 TESTING BRAKE SYSTEM................................................................134 ADJUSTING PARKING BRAKE LEVER.......................................................136 CHECKING WEAR IN THE BRAKE DISKS....................................................137 ANALYSIS OF CAUSES HYDRAULIC DRIFTS.................................................138 ADJUSTING OF CYLINDER DRAFT OF BACKFRAME LOCKING....................................143 30. DISASSEMBLY AND ASSEMBLY............................................................147 HOW TO READ THE MANUAL..............................................................149 PRECAUSIONS TO BE TAKEN WHILE WORKING...............................................150 SPECIAL TOOLS (For machine).........................................................151 SPECIAL TOOLS (For backhoe).........................................................153 STARTER MOTOR.......................................................................155 ALTERNATOR..........................................................................156 INJECTION PUMP......................................................................157 NOZZLE HOLDER.......................................................................161 CYLINDER HEAD.......................................................................162 RADIATOR - OIL COOLER UNIT..........................................................164 MUFFLER.............................................................................166 SEAT AND ENGINE HOOD................................................................167 SIDE COVER..........................................................................168 HEATING RADIATOR....................................................................169 CAB.................................................................................170 FUEL TANK...........................................................................174 HYDRAULIC OIL TANK..................................................................175 ENGINE - PUMP GROUP.................................................................176 PISTON PUMP AND STEERING PUMP.......................................................180 PISTON PUMP.........................................................................181 ENGINE-PUMP COUPLING JOINT..........................................................193 TRAVEL MOTOR........................................................................194 STEERING PUMP.......................................................................204 STEERING GEAR PUMP..................................................................205 WORK EQUIPMENT PUMP.................................................................209 BRAKE PUMP..........................................................................210 TRANSMISSION-REVERSE, DIRECTION INDICATOR AND HEADLING DIPPER BEAM CONTROL GROUP....211 STEERING UNIT.......................................................................212 PRIORITY VALVE......................................................................229 FRONT EQUIPMENT CONTROL VALVE.......................................................231 FRONT AXLE..........................................................................232 REAR AXLE...........................................................................234 AXLES...............................................................................236 TRANSMISSION........................................................................252 FRAME JOINT PIN.....................................................................270 FRONT BUCKET LIFT ARM CYLINDERS.....................................................273 FRONT BUCKET DUMPING CYLINDER.......................................................274 STEERING CYLINDERS..................................................................275 FRAME OSCILLATING LOCK CYLINDER.....................................................276 MACHINE CYLINDERS...................................................................277 FRAME OSCILLATING LOCK CYLINDER.....................................................283 FRONT BUCKET........................................................................284 TILT LEVER AND BUCKET LINK..........................................................285 FRONT BUCKET LIFT ARM...............................................................286 BACKHOE CONTROL VALVE...............................................................287 BACKHOE BOOM CYLINDER...............................................................290 BACKHOE ARM CYLINDER................................................................291 BACKHOE BUCKET CYLINDER.............................................................292 BACKHOE SWING CYLINDERS.............................................................293 HOUTRIGGER CYLINDERS................................................................294 BACKHOE BACKFRAME LOCK CYLINDERS....................................................295 BACKHOE CYLINDERS (boom, arm, bucket, outrigger, jig arm)...........................296 BOOM SWING CYLINDER.................................................................302 BACKHOE EQUIPMENT...................................................................305 BACKHOE BUCKET......................................................................306 ARM.................................................................................307 BACKHOE BOOM........................................................................308 BRACKET.............................................................................309 BACKFRAME...........................................................................310 40. MAINTENANCE STANDARD................................................................313 P.T.O...............................................................................315 TRANSMISSION........................................................................316 AXLES...............................................................................318 HYDROSTATIC TRANSMISSION PUMP.......................................................323 TRAVEL MOTOR........................................................................327 STEERING PUMP (P2)..................................................................329 3-SPOOL CONTROL VALVE...............................................................330 BRAKE PUMP..........................................................................332 OUTRIGGER SAFETY VALVES.............................................................333 STEERING AND FRONT WORK EQUIPMENT CYLINDERS.........................................334 BACKHOE CYLINDERS...................................................................336 FRAME KNUCKLE AND JOINT.............................................................340 BACKHOE FRAME.......................................................................341 FRONT WORK EQUIPMENT................................................................342 BACKFRAME AND BRACKET...............................................................344 BACKHOE WORK EQUIPMENT..............................................................346
DESCRIPTION:
KOMATSU WB70A-1 BACKHOE LOADER SERVICE REPAIR MANUAL (SN:F10392 & UP) KOMATSU WB70A-1
- This shop manual has been prepared as an aid to improve the quality of repairs by giving the operabr an ac- curate understanding of the product and by showing him the correct way to perform repairs and make judgements. Make sure you understand the contents of this manual and use it to full effect at every opportunity.
- This shop manual mainly contains the necessary technical information for operations performed in a service workshop. The manual is divided inb chapters on each main group of components; these chapters are further divided into the following sectiors.
- STRUCTURE AND FUNCTION
This section explains the structure and function of each component. It serves not only to give an under- standing of the structure. but also serves as reference material for troubleshooting. - TESTING AND ADJUSTING
This sections explains checks to be made before and after performing repairs, well fi adjustrnentsto be made at completion of the checks and repairs. Troubleshooting chars correlating «Problems. to «Causes. are also included in this section. - DISASSEMBLY AND ASSEMBLY
This section explains the order to be followed when removing. installing, disassembling or assembling each component. as well as precautions to be taken for these operations. - MAINTENANCE STANDARD
This section gives the judgement standards when inspecting disassembled parts.
PLEASE NOTE:
⦁ This is the SAME manual used by the dealers to troubleshoot any faults in your vehicle. This can be yours in 2 minutes after the payment is made.
⦁ Contact us at [email protected] should you have any queries before your purchase or that you need any other service / repair / parts operators manual.
