Komatsu PC20R-8 (SN from F30791) and PC27R-8 (SN from F31103) Crawler Excavators (Italy) Workshop Manual (WEBM000201)

Illustrated factory Workshop Manual for Komatsu Crawler Excavators Models PC20R-8 and PC27R-8.

This manual will assist you in diagnosing, repairing, and adjusting for your crawler excavator.
You can use a Windows, Mac, or Android device to view this manual. You only need to have a PDF reader installed.

Covered Models (Italy):
   PC20R-8 (SN: F30791-)
   PC27R-8 (SN: F31103-)

Format: PDF, 298 pages
Language: English
Table of Contents:
   FOREWORD
   HOW TO READ THE SHOP MANUAL
   HOISTING INSTRUCTIONS
   STANDARD TIGHTENING TORQUE
   COATING MATERIALS
   ELECTRIC WIRE CODE
   WEIGHT TABLE
   TABLE OF OIL AND COOLANT QUANTITIES
   STRUCTURE AND FUNCTION
      POWER TRAIN
      SWING CIRCLE
      SWING MACHINERY PC27R-8
      FINAL DRIVE
      TRACK FRAME
      RECOIL SPRING
      CARRIER ROLLER PC27R-8
      TRACK ROLLER
      STEEL SHOE
      HYDRAULIC SYSTEM PC20R-8
      HYDRAULIC SYSTEM PC27R-8
      HYDRAULIC CIRCUIT DIAGRAM PC20R-8
      HYDRAULIC CIRCUIT DIAGRAM PC27R-8
      HYDRAULIC PUMP PC20R-8
      HYDRAULIC PUMP PC27R-8
      TCC VALVE, LS VALVE, SERVO PISTON
      CONTROL VALVE
      CLSS
      SWIVEL JOINT
      SWING MOTOR
      TRAVEL MOTOR
      CYLINDER
      ACCUMULATOR
      PPC VALVE
      SOLENOID VALVE
      ELECTRICAL DIAGRAM (1/3)
      ELECTRICAL DIAGRAM (2/3)
      ELECTRICAL DIAGRAM (3/3)
   TESTING AND ADJUSTMENT
      NORMAL OR STANDARD TECHNICAL DATA
      SPECIAL TOOLS
      CHECKING THE ENGINE SPEED
      ADJUSTMENT OF VALVE CLEARANCE
      MEASUREMENT OF THE COMPRESSION PRESSURE
      CONTROL AND ADJUSTMENT OF THE TENSION OF THE FAN BELT
      CONTROL AND ADJUSTMENT OF THE INJECTION TIMING
      CONTROL AND ADJUSTMENT OF THE ACCELERATOR STROKE
      ADJUSTMENT OF THE STROKE OF THE BLADE COMMAND LEVER
      ADJUSTING THE FLEXIBLE CABLES
      CONTROL AND ADJUSTMENT OF THE STROKE OF THE TRAVEL LEVER
      ADJUSTMENT OF THE STROKE OF THE BOOM SWING COMMAND PEDAL
      ADJUSTMENT OF THE PPC VALVE CLEARANCES
      ADJUSTMENT OF THE RUBBER PAD AND SAFETY MICROSWITCH FOR SERVO-CONTROL ENGAGEMENT
      CONTROL AND ADJUSTMENT OF THE TRACK-SHOE TENSION
      CONTROL AND REGULATION OF THE PRESSURES IN THE HYDRAULIC CIRCUITS
      CONTROL AND REGULATION OF THE LS DIFFERENTIAL PRESSURE AND ADJUSTMENT OF THE LS VALVE (PC20R-8)
      REGULATION OF THE PC VALVE (PC20R-8)
      CONTROL AND REGULATION OF THE LS DIFFERENTIAL PRESSURE AND ADJUSTMENT OF THE LS VALVE (PC27R-8)
      REGULATION OF THE PC VALVE (PC27R-8)
      CONTROL AND REGULATION OF THE SERVO-CONTROL POWER SUPPLY
      ELIMINATION OF RESIDUAL PRESSURES - PRESSURISATION OF THE TANK
      BLEEDING AIR FROM THE HYDRAULIC CIRCUITS
      CONTROL OF HYDRAULIC DRIFTS - ANALYSIS OF THE CAUSES OF A DRIFT
      CHECKING FOR ANY LEAKAGES INSIDE THE WORKING EQUIPMENT CYLINDERS
      CHECKING FOR ANY LEAKAGES INSIDE THE SWING MOTOR
      METHODS FOR TESTING FOR LEAKAGES INSIDE THE SWIVEL JOINT
   REMOVAL AND INSTALLATION
      HOW TO READ THE MANUAL
      PRECAUTIONS TO BE TAKEN WHILE WORKING
      SPECIAL TOOLS
      STARTER MOTOR
      ALTERNATOR
      INJECTION PUMP
      NOZZLE HOLDER
      WATER COOLANT PUMP
      CYLINDER HEAD
      ENGINE HOOD
      CANOPY
      CAB
      HEATING FAN
      COUNTERWEIGHT
      FUEL TANK
      HYDRAULIC TANK
      OIL-COOLER - RADIATOR GROUP
      ENGINE-PUMP GROUP
      PUMP
      ENGINE-PUMP COUPLING
      LATERAL LOWER COVER
      INNER CONTROL VALVE BOX COVER
      CONTROL VALVE
      LEFT-HAND PPC VALVE (ARM-BUCKET)
      RIGHT-HAND PPC VALVE (BOOM-BUCKET)
      SERVOCONTROL SOLENOID GROUP
      PLATFORM
      SWIVEL JOINT
      SWING MACHINERY
      REVOLVING FRAME
      SWING CIRCLE
      RUBBER TRACK SHOES
      STEEL TRACK-SHOES
      SPROCKET WHEEL
      FINAL DRIVE
      IDLER AND RECOIL SPRING
      SPRING RECOIL AND THRUST CYLINDER GROUPS
      IDLER
      TRACK ROLLERS
      BOOM CYLINDER
      ARM CYLINDER
      BUCKET CYLINDER
      BOOM SWING CYLINDER
      BLADE CYLINDER
      WORK EQUIPMENT CYLINDERS
      UPPER WORK EQUIPMENT
      BUCKET
      ARM
      ARM ASSEMBLY
      BOOM
      BOOM SWING SUPPORT
      BLADE
   STANDARD MAINTENANCE
      SWING CIRCLE
      SWING MACHINERY PC27R-8
      FINAL DRIVE
      SPROCKET
      TRACK FRAME AND RECOIL SPRING
      IDLER
      CARRIER ROLLER PC27R-8
      TRACK ROLLER
      TRACK SHOE
      HYDRAULIC PUMP
      CONTROL VALVE
      SWIVEL JOINT
      SWING MOTOR
      TRAVEL MOTOR
      PPC VALVE
      CYLINDER
      WORK EQUIPMENT PC20R-8
      WORK EQUIPMENT PC27R-8