Komatsu PC20R-8 PC27R-8 Hydraulic Excavator Shop Manual WEBM000201 – PDF DOWNLOAD

Komatsu PC20R-8 PC27R-8 Hydraulic Excavator Shop Manual WEBM000201 – PDF DOWNLOAD

FILE DETAILS:

Komatsu PC20R-8 PC27R-8 Hydraulic Excavator Shop Manual WEBM000201 – PDF DOWNLOAD 

Language : English
Pages : 298
Downloadable : Yes
File Type : PDF

TABLE OF CONTENTS:

Komatsu PC20R-8 PC27R-8 Hydraulic Excavator Shop Manual WEBM000201 – PDF DOWNLOAD 

SERIAL NUMBER
PC20R-8 F30791 and up
PC27R-8 F31103 and up

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

DESCRIPTION:

Komatsu PC20R-8 PC27R-8 Hydraulic Excavator Shop Manual WEBM000201 – PDF DOWNLOAD 

SERIAL NUMBER
PC20R-8 F30791 and up
PC27R-8 F31103 and up

FOREWORD:

This shop manual has been prepared as an aid to improve the quality of repairs by giving the operator 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 into 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 of each component. It serves not only to give an understan- ding 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 made at completion of the checks and repairs.
Troubleshooting charts 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.

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