Komatsu Hydraulic Excavator PC20MRX-1 Shop Manual SEBM016601 – PDF DOWNLOAD

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Komatsu Hydraulic Excavator PC20MRX-1 Shop Manual SEBM016601 – PDF DOWNLOAD

FILE DETAILS:

Komatsu Hydraulic Excavator PC20MRX-1 Shop Manual SEBM016601 – PDF DOWNLOAD

Language : English
Pages :363
Downloadable : Yes
File Type : PDF

DESCRIPTION:

Komatsu Hydraulic Excavator PC20MRX-1 Shop Manual SEBM016601 – PDF DOWNLOAD

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 a service workshop. For ease of understanding, the manual is divided into the following chapters; these chapters are further divided into the each main group of components.

TABLE OF CONTENTS:

Komatsu Hydraulic Excavator PC20MRX-1 Shop Manual SEBM016601 – PDF DOWNLOAD

COVER 1
CONTENTS 2
01 GENERAL 25
GENERAL ASSEMBLY DRAWING 26
SPECIFICATIONS 28
WEIGHT TABLE 32
LIST OF LUBRICANT AND WATER 34
10 STRUCTURE AND FUNCTION 35
RADIATOR,OIL COOLER 36
ENGINE CONTROL 37
PTO 38
POWER TRAIN DIAGRAM 39
SWING CIRCLE 40
SWING MACHINERY 41
TRACK FRAME 42
RECOIL SPRING 43
TRACK SHOE 44
HYDRAULIC PIPING DRAWING 45
HYDRAULIC TANK 47
HYDRAULIC PUMP 48
CONTROL VALVE 68
CLSS 76
CENTER SWIVEL JOINT105
SWING MOTOR106
TRAVEL MOTOR107
VALVE CONTROL111
PPC VALVE112
SOLENOID VALVE119
WORK EQUIPMENT121
ELECTRICAL WIRING DIAGRAM122
MACHINE MONITOR SYSTEM124
20 TESTING AND ADJUSTING129
STANDARD VALUE TABLE130
STANDARD VALUE TABLE FOR ENGINE RELATED PARTS130
STANDARD VALUE TABLE FOR CHASSIS RELATED PARTS131
STANDARD VALUE TABLE FOR ELECTRICAL PARTS139
TESTING AND ADJUSTING141
TOOLS FOR TESTING,ADJUSTING,AND TROUBLESHOOTING142
MEASURING ENGINE SPEED143
MEASURING EXHAUST COLOR144
ADJUSTING VALVE CLEARANCE145
MEASURING COMPRESSION PRESSURE146
TESTING AND ADJUSTING FUEL INJECTION TIMING147
MEASURING ENGINE OIL PRESSURE148
TESTING AND ADJUSTING FAN BELT TENSION149
ADJUSTING FUEL CONTROL LEVER150
TESTING AND ADJUSTING TRACK SHOE TENSION151
MEASURING SPROCKET WEAR152
TESTING AND ADJUSTING HYDRAULIC PRESSURE IN WORK EQUIPMENT,SWING TRAVEL CIRCUIT153
TESTING AND ADJUSTING LS DIFFERENTIAL PRESSURE155
ADJUSTING TCC VALVE156
TESTING AND ADJUSTING CONTROL CIRCUIT PRESSURE157
MEASURING SWING HOLDING BRAKE INLET PORT PRESSURE158
ADJUSTING WORK EQUIPMENT,SWING PPC VALVE158
TESTING AND ADJUSTING TRAVEL DEVIATION159
MEASURING OIL LEAKAGE INSIDE WORK EQUIPMENT CYLINDER160
RELEASING REMAINING PRESSURE FROM HYDRAULIC CIRCUIT162
RELEASING REMAINING PRESSURE FROM HYDRAULIC TANK162
PRESSURIZING HYDRAULIC TANK162
BLEEDING AIR163
TROUBLESHOOTING165
POINTS TO REMEMBER WHEN TROUBLESHOOTING166
SEQUENCE OF EVENTS IN TROUBLESHOOTING167
POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE168
CHECKS BEFORE TROUBLESHOOTING176
CONNECTOR TYPES AND MOUNTING LOCATIONS177
CONNECTOR PIN ALLOCATION DRAWING178
CONNECTION TABLE FOR CONNECTOR PIN NUMBERS180
METHOD OF USING TROUBLESHOOTING CHARTS187
TROUBLESHOOTING OF ELECTRICAL SYSTEM(E MODE)189
E-MODE RELATED ELECTRICAL CIRCUIT DIAGRAM190
E-1 ENGINE DOES NOT START192
A) WHEN STARTING MOTOR DOES NOT TURN(STARTING SYSTEM)192
B) WHEN STARTING MOTOR TURNS(ENGINE STOP SOLENOID SYSTEM)194
E-2 ENGINE DOES NOT STOP196
E-3 WORK EQUIPMENT DOES NOT MOVE EVEN WHEN WORK EQUIPMENT LOCK LEVER IS CANCELED197
E-4 WORK EQUIPMENT MOVES EVEN WHEN WORK EQUIPMENT LOCK LEVER IS LOCKED198
E-5 TRAVEL SPEED DOES NOT INCREASE EVEN WHEN TRAVEL BOOST PEDAL IS DEPRESSED199
E-6 TRAVEL SPEED DOES NOT DECREASE EVEN WHEN TRAVEL BOOST PEDAL IS RELEASED200
TROUBLESHOOTING OF HYDRAULIC,MECHANICAL SYSTEM(H MODE)201
TABLE OF FAILURE MODES AND CAUSES202
H-1 SPEEDS OF ALL WORK EQUIPMENT,SWING,TRAVEL ARE SLOW OR LACK POWER204
H-2 THERE IS EXCESSIVE DROP IN ENGINE SPEED,OR ENGINE STALLS205
H-3 NO WORK EQUIPMENT,TRAVEL,SWING MOVE206
H-4 ABNORMAL NOISE GENERATED(FROM AROUND PUMP)206
H-5 FINE CONTROL ABILITY IS POOR OR RESPONSE IS POOR207
H-6 BOOM IS SLOW OR LACKS POWER208
H-7 ARM IS SLOW OR LACKS POWER208
H-8 BUCKET IS SLOW OR LACKS POWER209
H-9 BOOM SWING IS SLOW OR LACKS POWER209
H-10 BLADE IS SLOW OR LACKS POWER210
H-11 BOOM,ARM,BUCKET DO NOT MOVE(BOOM SWING,BLADE,TRAVEL AND SWING ARE NORMAL)210
H-12 EXCESSIVE HYDRAULIC DRIFT(BOOM,ARM,BUCKET,BOOM SWING,BLADE)211
A) BOOM211
B) ARM,BUCKET,BOOM SWING211
C) BLADE211
H-13 EXCESSIVE TIME LAG(ENGINE AT LOW IDLING)212
H-14 IN COMPOUND OPERATIONS,WORK EQUIPMENT WITH LARGER LOAD IS SLOW212
H-15 TRAVEL DEVIATION213
A) DEVIATION IN NORMAL TRAVEL213
B) DEVIATION WHEN STARTING213
H-16 TRAVEL SPEED IS SLOW OR LACKS POWER214
H-17 STEERING DOES NOT TURN EASILY214
H-18 TRAVEL SPEED DOES NOT SWITCH215
H-19 TRAVEL DOES NOT MOVE(ONE SIDE ONLY)215
H-20 SWING SPEED IS SLOW OR LACKS POWER216
A) SPEED IS SLOW OR LACKS POWER IN BOTH DIRECTIONS216
B) SPEED IS SLOW OR LACKS POWER IN ONE DIRECTION ONLY(LEFT OR RIGHT)216
H-21 DOES NOT SWING217
A) DOES NOT SWING IN EITHER DIRECTION217
B) DOES NOT SWING IN ONE DIRECTION(LEFT OR RIGHT)217
H-22 SWING ACCELERATION IS POOR218
A) ACCELERATION IS POOR IN BOTH DIRECTIONS218
B) ACCELERATION IS POOR IN ONE DIRECTION ONLY(LEFT OR RIGHT)218
H-23 EXCESSIVE OVERRUN WHEN STOPPING SWING219
A) OVERRUN WHEN STOPPING IS EXCESSIVE IN BOTH DIRECTIONS219
B) OVERRUN WHEN STOPPING IS EXCESSIVE IN ONE DIRECTION(LEFT OR RIGHT)219
H-24 EXCESSIVE SHOCK WHEN STOPPING SWING(IN ONE DIRECTION ONLY)220
H-25 EXCESSIVE ABNORMAL NOISE WHEN STOPPING SWING220
H-26 EXCESSIVE HYDRAULIC DRIFT OF SWING220
TROUBLESHOOTING OF MACHINE MONITOR SYSTEM(M MODE)221
ELECTRICAL CIRCUIT DIAGRAM FOR M MODE RELATED PARTS222
M-1 WHEN STARTING SWITCH IS TURNED ON,NO DISPLAY IS GIVEN223
M-2 WHEN STARTING SWITCH IS TURNED ON, EVEN WHEN SELF CHECK IS COMPLETED(ALL LAMPS LIGHT UP FOR 3 SECONDS),LAMPS DO NOT GO OUT223
M-3 WHEN STARTING SWITCH IS TURNED ON, SOME SELF CHECK LAMPS DO NOT LIGHT UP FOR 3 SECONDS 224
A) NO GAUGE LAMPS LIGHT UP(FUEL,COOLANT TEMPERATURE)224
B) CAUTION LAMPS(ENGINE OIL PRESSURE,BATTERY CHARGE),PILOT LAMP(PREHEATING)DO NOT LIGHT UP224
M-4 DURING SELF CHECK(ALL LAMPS LIGHT UP FOR 3 SECONDS),EVEN IF STARTING SWITCH IS TURNED TO START,SELF CHECK IS NOT COMPLETED FOR 3 SECONDS224
M-5 WHEN STARTING SWITCH IS ON(ENGINE STOPPED),ENGINE OIL PRESSURE CAUTION LAMP DOES NOT LIGHT UP225
M-6 WHEN STARTING SWITCH IS TURNED ON(BEFORE STARTING ENGINE),CHARGE CAUTION LAMP DOES NOT LIGHT UP226
M-7 WHEN STARTING SWITCH IS TURNED TO HEAT,PREHEATING PILOT LAMP DOES NOT LIGHT UP227
M-8 WHEN ENGINE IS RUNNING,ENGINE OIL PRESSURE CAUTION LAMP LIGHTS UP227
M-9 WHEN ENGINE IS RUNNING,CHARGE CAUTION LAMP LIGHTS UP228
M-10 ABNORMALITY IN COOLANT TEMPERATURE GAUGE230
A) LEVEL DOES NOT RISE FROM SEGMENT C230
B) LEVEL DOES NOT GO DOWN FROM SEGMENT H, OR ALL SEGMENTS GO OUT230
C) COOLANT TEMPERATURE DOES NOT MATCH GAUGE DISPLAY231
M-11 ABNORMALITY IN FUEL GAUGE232
A) LEVEL DOES NOT RISE FROM SEGMENT E OR ALL SEGMENTS GO OUT232
B) LEVEL DOES NOT GO DOWN FROM SEGMENT F232
C) FUEL LEVEL DOES NOT MATCH GAUGE DISPLAY233
M-12 DEFECTIVE OPERATION OF ALARM BUZZER234
A) BUZZER DOES NOT SOUND234
B) BUZZER CONTINUES TO SOUND AND DOES NOT STOP234
M-13 WHEN ENGINE IS RUNNING, SERVICE METER DOES NOT ADVANCE235
A) WHEN CHARGE CAUTION LAMP DOES NOT LIGHT UP235
B) WHEN CHARGE CAUTION LAMP LIGHTS UP235
C) PILOT LAMP DOES NOT FLASH(SERVICE METER IS ACTUATED)235
M-14 NIGHT LIGHTING DOES NOT LIGHT UP236
A) GAUGE LIGHTING DOES NOT LIGHT UP236
B) SERVICE METER LIGHTING DOES NOT LIGHT UP236
30 DISASSEMBLY AND ASSEMBLY237
METHOD OF USING MANUAL239
PRECAUTIONS WHEN CARRYING OUT OPERATION240
SPECIAL TOOL LIST242
STARTING MOTOR243
REMOVAL AND INSTALLATION243
ALTERNATOR244
REMOVAL AND INSTALLATION244
FUEL INJECTION PUMP245
REMOVAL245
INSTALLATION246
NOZZLE HOLDER247
REMOVAL AND INSTALLATION247
WATER PUMP248
REMOVAL AND INSTALLATION248
THERMOSTAT249
REMOVAL AND INSTALLATION249
ENGINE FRONT SEAL250
REMOVAL AND INSTALLATION250
ENGINE REAR SEAL251
REMOVAL251
INSTALLATION252
CYLINDER HEAD253
REMOVAL253
INSTALLATION254
RADIATOR255
REMOVAL AND INSTALLATION255
ENGINE AND HYDRAULIC PUMP256
REMOVAL256
INSTALLATION259
FUEL TANK260
REMOVAL AND INSTALLATION260
DAMPER261
REMOVAL AND INSTALLATION261
CENTER SWIVEL JOINT262
REMOVAL AND INSTALLATION262
DISASSEMBLY AND ASSEMBLY263
TRAVEL MOTOR264
REMOVAL AND INSTALLATION264
SPROCKET265
REMOVAL AND INSTALLATION265
SWING MOTOR AND SWING MACHINERY266
REMOVAL AND INSTALLATION266
REVOLVING FRAME267
REMOVAL267
INSTALLATION268
SWING CIRCLE269
REMOVAL AND INSTALLATION269
IDLER270
REMOVAL AND INSTALLATION270
DISASSEMBLY271
ASSEMBLY272
RECOIL SPRING274
REMOVAL AND INSTALLATION274
DISASSEMBLY AND ASSEMBLY275
TRACK ROLLER276
REMOVAL AND INSTALLATION276
DISASSEMBLY277
ASSEMBLY278
RUBBER SHOE279
REMOVAL AND INSTALLATION279
HYDRAULIC TANK280
REMOVAL AND INSTALLATION280
HYDRAULIC OIL COOLER281
REMOVAL AND INSTALLATION281
HYDRAULIC PUMP282
REMOVAL AND INSTALLATION282
CONTROL VALVE283
REMOVAL283
INSTALLATION285
DISASSEMBLY286
ASSEMBLY291
MAIN RELIEF VALVE296
REMOVAL AND INSTALLATION296
RIGHT/LEFT PPC VALVE297
REMOVAL297
INSTALLATION298
PPC VALVE299
DISASSEMBLY299
ASSEMBLY300
BOOM CYLINDER301
REMOVAL301
INSTALLATION302
ARM CYLINDER303
REMOVAL303
INSTALLATION304
BUCKET CYLINDER305
REMOVAL305
INSTALLATION306
SWING CYLINDER307
REMOVAL307
INSTALLATION308
BRADE CYLINDER309
REMOVAL AND INSTALLATION309
HYDRAULIC CYLINDER310
DISASSEMBLY310
ASSEMBLY313
WORK EQUIPMENT316
REMOVAL316
INSTALLATION317
BUCKET318
REMOVAL AND INSTALLATION318
QUICK BUCKET319
REMOVAL AND INSTALLATION319
ARM320
REMOVAL320
INSTALLATION321
BUCKET AND ARM322
REMOVAL322
INSTALLATION323
BOOM324
REMOVAL324
INSTALLATION325
SWING BRACKET326
REMOVAL326
INSTALLATION327
BLADE328
REMOVAL AND INSTALLATION328
SOLENOID VALVE329
REMOVAL AND INSTALLATION329
COUNTERWEGHT330
REMOVAL AND INSTALLATION330
SEAT AND BRACKET331
REMOVAL AND INSTALLATION331
MONITOR332
REMOVAL AND INSTALLATION332
40 MAINTENANCE STANDARD333
SWING CIRCLE334
TRACK FRAME,RECOIL SPRING335
IDLER336
TRACK ROLLER337
TRACK SHOE338
HYDRAULIC PUMP341
CONTROL PUMP342
CONTROL VALVE343
CENTER SWIVEL JOINT349
TRAVEL MOTOR350
PPC VALVE351
HYDRAULIC CYLINDER353
WORK EQUIPMENT355
DIMENSION OF WORK EQUIPEMENT357
90 OTHERS361
HYDRAULIC CIRCUIT DIAGRAM362
ELECTRICAL CIRCUIT DIAGRAM363

IMAGES PREVIEW OF THE MANUAL:

S.M 22/12/24