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KOMATSU PC20R-8 PC27R-8 HYDRAULIC EXCAVATOR SERVICE REPAIR MANUAL (WEBM000201) – PDF DOWNLOAD
Original price was: $61.95.$26.95Current price is: $26.95.
- KOMATSU PC20R-8 PC27R-8 HYDRAULIC EXCAVATOR SERVICE REPAIR MANUAL
- PUBLICATION NUMBER:WEBM000201
- SERIAL NUMBER:PC20R-8 F30791 and up
PC27R-8 F31103 and up
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Description
KOMATSU PC20R-8 PC27R-8 HYDRAULIC EXCAVATOR SERVICE REPAIR MANUAL (WEBM000201)
KOMATSU PC20R-8 PC27R-8 HYDRAULIC EXCAVATOR SERVICE REPAIR MANUAL (WEBM000201) – PDF DOWNLOAD:
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DESCRIPTION:
KOMATSU PC20R-8 PC27R-8 HYDRAULIC EXCAVATOR SERVICE REPAIR MANUAL (WEBM000201)
- This shop manual hm 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 contairs the necesary technical information for operatiors performed in a service workshop. The manualis divided inb chapters on each main group of components; these chapters are further divided into the following sections.
- STRUCTURE AND FUNCTION
This section explains the structure and function ofeach component. It serves not onlyto give an understanding 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, as well as adjustments to be mate at completion of the checks and repairs. Troubleshooting chart 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 forthese operations. - MAINTENANE STANDARD
This section gives the judgement standards when inspecting cfisassembled parts.
TABLE OF CONTENTS:
KOMATSU PC20R-8 PC27R-8 HYDRAULIC EXCAVATOR SERVICE REPAIR MANUAL (WEBM000201)
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...................................................................................... 13 ELECTRIC WIRE CODE..................................................................................... 14 WEIGHT TABLE........................................................................................... 15 TABLE OF OIL AND COOLANT QUANTITIES.................................................................... 16 10.STRUCTURE AND FUNCTION.............................................................................. 19 POWER TRAIN........................................................................................ 20 SWING CIRCLE....................................................................................... 22 SWING MACHINERY PC27R-8............................................................................ 24 FINAL DRIVE........................................................................................ 25 TRACK FRAME........................................................................................ 26 RECOIL SPRING...................................................................................... 28 CARRIER ROLLER PC27R-8............................................................................. 29 TRACK ROLLER....................................................................................... 29 STEEL SHOE......................................................................................... 30 HYDRAULIC SYSTEM PC20R-8........................................................................... 31 HYDRAULIC SYSTEM PC27R-8........................................................................... 33 HYDRAULIC CIRCUIT DIAGRAM PC20R-8.................................................................. 35 HYDRAULIC CIRCUIT DIAGRAM PC27R-8.................................................................. 37 HYDRAULIC PUMP PC20R-8............................................................................. 38 HYDRAULIC PUMP PC27R-8............................................................................. 42 TCC VALVE, LS VALVE, SERVO PISTON.................................................................. 48 CONTROL VALVE...................................................................................... 62 CLSS............................................................................................... 70 SWIVEL JOINT....................................................................................... 87 SWING MOTOR........................................................................................ 88 TRAVEL MOTOR....................................................................................... 92 CYLINDER........................................................................................... 95 ACCUMULATOR........................................................................................ 99 PPC VALVE..........................................................................................100 PPC VALVE..........................................................................................104 SOLENOID VALVE.....................................................................................107 ELECTRICAL DIAGRAM (1/3)...........................................................................109 ELECTRICAL DIAGRAM (2/3)...........................................................................111 ELECTRICAL DIAGRAM (3/3)...........................................................................113 20.TESTING AND ADJUSTMENT..............................................................................117 NORMAL OR STANDARD TECHNICAL DATA..................................................................118 SPECIAL TOOLS......................................................................................140 CHECKING THE ENGINE SPEED..........................................................................141 ADJUSTMENT OF VALVE CLEARANCE......................................................................142 MEASUREMENT OF THE COMPRESSION PRESSURE............................................................143 CONTROL AND ADJUSTMENT OF THE TENSION OF THE FAN BELT..............................................144 CONTROL AND ADJUSTMENT OF THE INJECTION TIMING.....................................................145 CONTROL AND ADJUSTMENT OF THE ACCELERATOR STROKE...................................................147 ADJUSTMENT OF THE STROKE OF THE BLADE COMMAND LEVER................................................148 ADJUSTING THE FLEXIBLE CABLES......................................................................149 CONTROL AND ADJUSTMENT OF THE STROKE OF THE TRAVEL LEVER...........................................150 ADJUSTMENT OF THE STROKE OF THE BOOM SWING COMMAND PEDAL...........................................151 ADJUSTMENT OF THE PPC VALVE CLEARANCES.............................................................152 ADJUSTMENT OF THE RUBBER PAD AND SAFETY MICROSWITCH FOR SERVO-CONTROL ENGAGEMENT...................153 CONTROL AND ADJUSTMENT OF THE TRACK-SHOE TENSION...................................................154 CONTROL AND REGULATION OF THE PRESSURES IN THE HYDRAULIC CIRCUITS..................................155 CONTROL AND REGULATION OF THE LS DIFFERENTIAL PRESSURE AND ADJUSTMENT OF THE LS VALVE (PC20R-8)....160 REGULATION OF THE PC VALVE (PC20R-8)...............................................................162 CONTROL AND REGULATION OF THE LS DIFFERENTIAL PRESSURE AND ADJUSTMENT OF THE LS VALVE (PC27R-8)....163 REGULATION OF THE PC VALVE (PC27R-8)...............................................................165 CONTROL AND REGULATION OF THE SERVO-CONTROL POWER SUPPLY...........................................166 ELIMINATION OF RESIDUAL PRESSURES - PRESSURISATION OF THE TANK.....................................167 BLEEDING AIR FROM THE HYDRAULIC CIRCUITS...........................................................168 CONTROL OF HYDRAULIC DRIFTS - ANALYSIS OF THE CAUSES OF A DRIFT....................................170 CHECKING FOR ANY LEAKAGES INSIDE THE WORKING EQUIPMENT CYLINDERS...................................176 CHECKING FOR ANY LEAKAGES INSIDE THE SWING MOTOR...................................................177 METHODS FOR TESTING FOR LEAKAGES INSIDE THE SWIVEL JOINT...........................................178 30.REMOVAL AND INSTALLATION............................................................................183 HOW TO READ THE MANUAL.............................................................................185 PRECAUTIONS TO BE TAKEN WHILE WORKING..............................................................186 SPECIAL TOOLS......................................................................................187 STARTER MOTOR......................................................................................189 ALTERNATOR.........................................................................................190 INJECTION PUMP.....................................................................................191 NOZZLE HOLDER......................................................................................193 WATER COOLANT PUMP.................................................................................194 CYLINDER HEAD......................................................................................196 ENGINE HOOD........................................................................................198 CANOPY.............................................................................................199 CAB................................................................................................200 HEATING FAN........................................................................................201 COUNTERWEIGHT......................................................................................203 FUEL TANK..........................................................................................204 HYDRAULIC TANK.....................................................................................205 OIL-COOLER - RADIATOR GROUP........................................................................207 ENGINE-PUMP GROUP..................................................................................209 PUMP...............................................................................................212 ENGINE-PUMP COUPLING...............................................................................213 LATERAL LOWER COVER................................................................................214 INNER CONTROL VALVE BOX COVER......................................................................215 CONTROL VALVE......................................................................................216 LEFT-HAND PPC VALVE (ARM-BUCKET)...................................................................218 RIGHT-HAND PPC VALVE (BOOM-BUCKET).................................................................219 SERVOCONTROL SOLENOID GROUP........................................................................220 PLATFORM...........................................................................................221 SWIVEL JOINT.......................................................................................224 SWING MACHINERY....................................................................................225 REVOLVING FRAME....................................................................................228 SWING CIRCLE.......................................................................................230 RUBBER TRACK SHOES.................................................................................231 STEEL TRACK-SHOES..................................................................................232 SPROCKET WHEEL.....................................................................................233 FINAL DRIVE........................................................................................234 IDLER AND RECOIL SPRING............................................................................235 SPRING RECOIL AND THRUST CYLINDER GROUPS...........................................................236 IDLER..............................................................................................237 TRACK ROLLERS......................................................................................238 BOOM CYLINDER......................................................................................239 ARM CYLINDER.......................................................................................241 BUCKET CYLINDER....................................................................................242 BOOM SWING CYLINDER................................................................................243 BLADE CYLINDER.....................................................................................245 WORK EQUIPMENT CYLINDERS...........................................................................246 UPPER WORK EQUIPMENT...............................................................................252 BUCKET.............................................................................................254 ARM................................................................................................255 ARM ASSEMBLY.......................................................................................257 BOOM...............................................................................................258 BOOM SWING SUPPORT.................................................................................260 BLADE..............................................................................................261 40.STANDARD MAINTENANCE................................................................................265 SWING CIRCLE.......................................................................................266 SWING MACHINERY PC27R-8............................................................................267 FINAL DRIVE........................................................................................268 SPROCKET...........................................................................................269 TRACK FRAME AND RECOIL SPRING......................................................................270 IDLER..............................................................................................271 CARRIER ROLLER PC27R-8.............................................................................272 TRACK ROLLER.......................................................................................273 TRACK SHOE.........................................................................................274 HYDRAULIC PUMP.....................................................................................276 CONTROL VALVE......................................................................................278 SWIVEL JOINT.......................................................................................284 SWING MOTOR........................................................................................285 TRAVEL MOTOR.......................................................................................288 PPC VALVE..........................................................................................290 CYLINDER...........................................................................................292 WORK EQUIPMENT PC20R-8.............................................................................294 WORK EQUIPMENT PC27R-8.............................................................................296
PLEASE NOTE:
⦁ This is the same manual used by the dealers to diagnose and troubleshoot your vehicle
⦁ You will be directed to the download page as soon as the purchase is completed. The whole payment and downloading process will take anywhere between 2-5 minutes
⦁ Need any other service / repair / parts manual, please feel free to contact [email protected] . We still have 50,000 manuals unlisted
