Komatsu Hydraulic Excavator PC20-6 PC30-6 PC40-6 Shop Manual SEBM020R0604 PDF

Description

Komatsu Hydraulic Excavator PC20-6 PC30-6 PC40-6 Shop Manual SEBM020R0604 – PDF DOWNLOAD

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Komatsu Hydraulic Excavator PC20-6 PC30-6 PC40-6 Shop Manual SEBM020R0604 – PDF DOWNLOAD

Language : English
Pages :345
Downloadable : Yes
File Type : PDF

DESCRIPTION:

Komatsu Hydraulic Excavator PC20-6 PC30-6 PC40-6 Shop Manual SEBM020R0604 – PDF DOWNLOAD

MACHINE MODEL  SERIAL No.
PC20-6                     24001 and up
PC30-6                     10001 and up
PC40-6                    10001 and up

FOREWORD

• This shop manual has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate 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 aservice workshop. For ease of understanding, the manual is divided into chapters for each main group of components; these chapters are further divided into the following sections.

Komatsu Hydraulic Excavator PC20-6 PC30-6 PC40-6 Shop Manual SEBM020R0604 – PDF DOWNLOAD

MACHINE MODEL  SERIAL No.
PC20-6                     24001 and up
PC30-6                     10001 and up
PC40-6                    10001 and up

COVER 1
CONTENTS 2
10 STRUCTURE AND FUNCTION 17
POWER TRAIN 18
SWING CIRCLE 19
SWING MACHINERY 20
SPROCKET 22
TRACK FRAME AND RECOIL SPRING 23
IDLER 24
TRACK ROLLER 24
TRACK SHOE 25
HYDRAULIC PIPING 27
HYDRAULIC CIRCUIT SCHEMATICS 29
HYDRAULIC CIRCUIT DIAGRAM 32
HYDRAULIC TANK 39
HYDRAULIC TRIPLE GEAR PUMP 41
6-SPOOL CONTROL VALVE 43
2-SPOOL CONTROL VALVE 45
3-SPOOL CONTROL VALVE 46
CENTER SWIVEL JOINT 49
SWING MOTOR 51
TRAVEL MOTOR (WITH REDUCTION GEAR) 52
VALVE CONTROL 57
WORK EQUIPMENT 58
ELECTRICAL CIRCUIT DIAGRAM 59
20 TESTING AND ADJUSTING 63
TABLE OF JUDGEMENT STANDARD VALVE 64
TESTING AND ADJUSTING TOOL LIST 74
ADJUSTING VALVE CLEARANCE (PC20,30-6) 75
ADJUSTING VALVE CLEARANCE (PC40-6) 76
MEASURING COMPRESSION PRESSURE 77
TESTING AND ADJUSTING FUEL INJECTION TIMING (PC20,30-6) 78
TESTING AND ADJUSTING FUEL INJECTION TIMING (PC40-6) 79
BLEEDING AIR FROM HYDRAULIC CYLINDERS 80
MEASURING AND ADJUSTING HYDRAULIC PRESSURE 81
MEASURING HYDRAULIC PRESSURE OF ACCELERATION CIRCUIT (PC30,40-6) 84
MEASURING DISCHARGE AMOUNT OF PUMP 85
MEASURING OIL LEAKAGE FROM SWING, TRAVEL MOTORS 86
TESTING FOR LEAKAGE OF OIL FROM CENTER SWIVEL JOINT (PC20-6) 87
TESTING FOR LEAKAGE OF OIL FROM CENTER SWIVEL JOINT (PC30-6) 88
TESTING FOR LEAKAGE OF OIL FROM CENTER SWIVEL JOINT (PC40-6) 89
MEASURING LEAKAGE FROM HYDRAULIC CYLINDERS 90
TROUBLESHOOTING 91
PREPARATION OF TROUBLESHOOTING 92
HOW TO USE DIAGNOSTIC TABLE 94
PREVENTING RECURRENCE OF THE SAME TROUBLE 96
1WORK EQUIPMENT, SWING, AND TRAVEL DO NOT MOVE, OR SPEED IS EXTREMELY SLOW 97
2ARM IN (OUT) LACKS POWER (INCLUDING LACK OF SPEED) 98
3BUCKET CURL (DUMP), BOOM RAISE (PUSHING UP CHASSIS), AND BOOM SWING LACK POWER (INCLUDING LACK OF SPEED) 99
4ARM IN (OUT) OPERATION IS IMPOSSIBLE100
5BUCKET CURL (DUMP), BOOM RAISE (LOWER), BOOM SWING OPERATION IS IMPOSSIBLE101
6EXCESSIVE HYDRAULIC DRIFT OF WORK EQUIPMENT (BOOM, ARM, BUCKET, BLADE, BOOM SWING)102
7BLADE LACKS POWER (INCLUDING LACK OF SPEED)103
8BLADE OPERATION IS IMPOSSIBLE104
9LEFT (RIGHT) BOOM SWING LACKS POWER (INCLUDING LACK OF SPEED)105
10SWING OPERATION IS IMPOSSIBLE TO LEFT (OR RIGHT)106
11EXCESSIVE OVERRUN OF SWING ON SLOPES (HYDRAULIC DRIFT OF SWING)107
12EXCESSIVE OVERRUN WHEN SWING IS STOPPED108
13MACHINE NATURALLY DEVIATES TO ONE SIDE WHEN TRAVELING109
14MACHINE DOES NOT TRAVEL FORWARD (IN REVERSE)110
15TRAVEL SPEED DOES NOT CHANGE (PC3040-6)111
30 DISASSEMBLY AND ASSEMBLY112
METHOD OF READING MANUAL114
TABLE OF SPECIAL TOOLS116
STARTING MOTOR118
REMOVAL118
INSTALLATION118
ALTERNATOR118
REMOVAL118
INSTALLATION118
WATER PUMP120
REMOVAL120
INSTALLATION120
FUEL INJECTION PUMP122
REMOVAL122
INSTALLATION122
NOZZLE HOLDER124
REMOVAL124
INSTALLATION124
CYLINDER HEAD126
REMOVAL (PC2030-6)126
INSTALLATION (PC2030-6)126
REMOVAL (PC40-6)128
INSTALLATION (PC40-6)128
HYDRAULIC OIL COOLER 130
REMOVAL130
INSTALLATION130
RADIATOR130
REMOVAL 130
INSTALLATION130
ENGINE132
REMOVAL (PC20,30-6)132
INSTALLATION (PC20,30-6)132
REMOVAL (PC40-6)134
INSTALLATION (PC40-6)134
SWING CIRCLE136
REMOVAL136
INSTALLATION136
SWING MACHINERY138
REMOVAL138
INSTALLATION 138
DISASSEMBLY (PC2030-6)140
ASSEMBLY (PC2030-6)142
DISASSEMBLY (PC40-6)144
ASSEMBLY (PC40-6)146
REVOLVING FRAME148
REMOVAL148
INSTALLATION148
TRACK SHOE150
REMOVAL150
INSTALLATION150
TRACK ROLLER152
REMOVAL152
INSTALLATION152
IDLER, RECOIL SPRING152
REMOVAL152
INSTALLATION152
RECOIL SPRING154
DISASSEMBLY154
ASSEMBLY154
SPROCKET156
REMOVAL156
INSTALLATION156
HYDRAULIC PUMP156
REMOVAL156
INSTALLATION156
6-SPOOL CONTROL VALVE158
REMOVAL158
INSTALLATION158
3-SPOOL CONTROL VALVE158
REMOVAL158
INSTALLATION158
2-SPOOL CONTROL VALVE158
REMOVAL158
INSTALLATION158
6-SPOOL CONTROL VALVE160
DISASSEMBLY160
ASSEMBLY160
3-SPOOL CONTROL VALVE162
DISASSEMBLY162
ASSEMBLY162
SWING MOTOR164
REMOVAL164
INSTALLATION164
DISASSEMBLY166
ASSEMBLY168
CENTER SWIVEL JOINT170
REMOVAL170
INSTALLATION170
DISASSEMBLY (PC20,30-6)172
ASSEMBLY (PC20,30-6)172
DISASSEMBLY (PC40-6)174
ASSEMBLY (PC40-6)174
TRAVEL MOTOR176
REMOVAL176
INSTALLATION176
DISASSEMBLY (PC20-6)178
ASSEMBLY (PC20-6)190
DISASSEMBLY (PC30,40-6)208
ASSEMBLY (PC30,40-6)222
DISASSEMBLY (PC20-6)240
ASSEMBLY (PC20-6)248
DISASSEMBLY (PC30-6)258
ASSEMBLY (PC30-6)266
DISASSEMBLY (PC40-6)278
ASSEMBLY (PC40-6)286
BOOM CYLINDER 296
REMOVAL296
INSTALLATION296
ARM CYLINDER 298
REMOVAL298
INSTALLATION298
BUCKET CYLINDER298
REMOVAL298
INSTALLATION298
BLADE CYLINDER300
REMOVAL300
INSTALLATION300
BOOM SWING CYLINDER300
REMOVAL300
INSTALLATION300
HYDRAULIC CYLINDER302
DISASSEMBLY302
ASSEMBLY304
REPLACING HYDRAULIC CYLINDER PISTON RING306
WORK EQUIPMENT308
REMOVAL308
INSTALLATION308
BLADE 308
REMOVAL308
INSTALLATION308
BUCKET310
REMOVAL310
INSTALLATION310
ARM 310
REMOVAL310
INSTALLATION310
ARM, BUCKET312
REMOVAL312
INSTALLATION312
BOOM312
REMOVL312
INSTALLATION312
FLOOR FRAME314
REMOVAL314
INSTALLATION314
40 MAINTENANCE STANDARD316
SWING CIRCLE317
SWING MACHINERY318
SPROCKET320
TRACK FRAME AND RECOIL SPRING321
IDLER322
TRACK ROLLER323
TRACK SHOE324
TRIPLE GEAR PUMP326
CENTER SWIVEL JOINT328
SWING MOTOR330
TRAVEL MOTOR BRAKE VALVE331
6-SPOOL CONTROL VALVE333
2-SPOOL CONTROL VALVE334
3-SPOOL CONTROL VALVE335
HYDRAULIC CYLINDER336
WORK EQUIPMENT342

IMAGES PREVIEW OF THE MANUAL:

S.M 22/12/24