Komatsu PC228US-2, PC228USLC-1, PC228USLC-2 Excavator Shop Manual PDF
$31.95
Komatsu PC228US-2, PC228USLC-1, PC228USLC-2 Excavator Shop Manual SEBM015903 – PDF DOWNLOAD
MACHINE MODEL SERIAL NUMBER
PC228USLC-1 11001 and up
PC228US-2 15001 and up
PC228USLC-2 15001 and up
Description
Komatsu PC228US-2, PC228USLC-1, PC228USLC-2 Excavator Shop Manual SEBM015903 – PDF DOWNLOAD
FILE DETAILS:
Komatsu PC228US-2, PC228USLC-1, PC228USLC-2 Excavator Shop Manual SEBM015903 – PDF DOWNLOAD
Language : English
Pages : 661
Downloadable : Yes
File Type : PDF
IMAGES PREVIEW OF THE MANUAL:
DESCRIPTION:
Komatsu PC228US-2, PC228USLC-1, PC228USLC-2 Excavator Shop Manual SEBM015903 – PDF DOWNLOAD
MACHINE MODEL SERIAL NUMBER
PC228USLC-1 11001 and up
PC228US-2 15001 and up
PC228USLC-2 15001 and up
GENERAL PRECAUTIONS :
Mistakes in operation are extremely dangerous. Read the OPERATION & MAINTENANCE MANUAL carefully BEFORE operating the machine.
PREPARATIONS FOR WORK:
PRECAUTIONS DURING WORK :
TABLE OF CONTENTS:
Komatsu PC228US-2, PC228USLC-1, PC228USLC-2 Excavator Shop Manual SEBM015903 – PDF DOWNLOAD
MACHINE MODEL SERIAL NUMBER
PC228USLC-1 11001 and up
PC228US-2 15001 and up
PC228USLC-2 15001 and up
COVER 1
CONTENTS 2
01 GENERAL 27
SPECIFICATION DIMENSION DRAWINGS 28
SPECIFICATIONS 30
WEIGHT TABLE 36
FUEL,COOLANT AND LUBRICANTS 42
10 STRUCTURE AND FUNCTION 44
ENGINE RELATED PARTS 45
RADIATOR・OIL COOLER・AFTERCOOLER 46
POWER TRAIN 47
FINAL DRIVE 48
SWING CIRCLE 49
SWING MACHINERY 50
TRACK FRAME・RECOIL SPRING 51
TRACK SHOE 52
HYDRAULIC PIPING DRAWING 53
HYDRAULIC CIRCUIT DIAGRAM 55
HYDRAULIC TANK 56
HYDRAULIC PUMP 57
CONTROL VALVE 76
SELF-REDUCING PRESSURE VALVE 87
SAFETY-SUCTION VALVE FOR SERVICE VALVE 92
SWING MOTOR 93
CENTER SWIVEL JOINT 100
TRAVEL MOTOR 101
VALVE CONTROL 109
WORK EQUIPMENT・SWING PPC VALVE 110
TRAVEL PPC VALVE 114
PPC ACCUMULATOR 118
STRAIGHT-TRAVEL SYSTEM 119
LS-EPC VALVE 120
SOLENOID VALVE 123
BOOM HOLDING VALVE 125
WORK EQUIPMENT 128
ACTUAL ELECTRIC WIRING DIAGRAM 129
ELECTRICAL CIRCUIT DIAGRAM 132
ENGINE CONTROL SYSTEM 134
ELECTRONIC CONTROL SYSTEM 138
MACHINE MONITORING SYSTEM 153
20 TESTING AND ADJUSTING 159
TABLE OF JUDGEMENT STANDARD VALUE 161
STANDARD VALUE TABLE FOR ELECTRICAL PARTS 171
TESTING AND ADJUSTING 179
TOOLS FOR TESTING,ADJUSTING,AND TROUBLESHOOTING 180
MEASURING ENGINE SPEED 181
MEASURING EXHAUST GAS COLOR 182
ADJUSTING VALVE CLEARANCE 183
MEASURING COMPRESSION PRESSURE 184
MEASURING BLOW-BY PRESSURE 184
TESTING AND ADJUSTING FUEL INJECTION TIMING 185
MEASURING ENGINE OIL PRESSURE 186
TESTING AND ADJUSTING AIR CONDITIONER COMPRESSOR BELT TENSION 187
MEASURING SPEED SENSOR 187
ADJUSTING ENGINE STOP SOLENOID LINKAGE 188
ADJUSTING ACCELERATOR ACTUATOR CABLE 189
TESTING AND ADJUSTING HYDRAULIC PRESSURE IN WORK EQUIPMENT,SWING,TRAVEL CIRCUIT 190
TESTING AND ADJUSTING OUTPUT PRESSURE OF PC VALVE (SERVO PISTON INPUT PRESSURE) 193
TESTING AND ADJUSTING LS VALVE OUTPUT PRESSURE (SERVO PISTON INPUT PRESSURE) AND LS DIFFERENTIAL PRESSURE 195
MEASURING CONTROL CIRCUIT OIL PRESSURE (REDUCED PUMP DISCHARGE SELF-REDUCING PRESSURE) 198
TESTING SOLENOID VALVE OUTPUT PRESSURE 199
MEASURING PPC VALVE OUTPUT PRESSURE 202
ADJUSTING WORK EQUIPMENT・SWING PPC VALVE 203
TESTING TRAVEL DEVIATION 204
CHECKING LOCATION OF CAUSE OF HYDRAULIC DRIFT OF WORK EQUIPMENT 205
MEASURING OIL LEAKAGE OF SWING,TRAVEL MOTOR 207
RELEASING REMAINING PRESSURE IN HYDRAULIC CIRCUIT 207
TESTING CLEARANCE OF SWING CIRCLE BEARING 208
MEASURING WEAR OF SPROCKET 209
TESTING AND ADJUSTING TRACK SHOE TENSION 210
BLEEDING AIR 211
PROCEDURE FOR RESETTING ELECTRICAL SYSTEM AND CHECKING OPERATION 213
PROCEDURE FOR REPLACING POTENTIOMETER 225
PROCEDURE FOR CHECKING DIODE 226
TROUBLESHOOTING 227
POINTS TO REMEMBER WHEN TROUBLESHOOTING 228
SEQUENCE OF EVENTS IN TROUBLESHOOTING 229
POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE 230
CHECKS BEFORE TROUBLESHOOTING 238
CONNECTOR TYPES AND MOUNTING LOCATIONS 239
CONNECTOR ARRANGEMENT DIAGRAM 242
CONNECTION TABLE FOR CONNECTOR PIN NUMBERS 247
EXPLANATIONS OF CONTROL MECHANISM OF ELECTRICAL SYSTEM 258
DISPLAY METHOD FOR MONITOR PANEL,CONTROLLER MONITOR PANEL,CONTROLLER DISPLAY METHOD 261
ERROR CODE TABLE 265
METHOD OF USING TROUBLESHOOTING CHARTS 266
TROUBLESHOOTING OF ENGINE SYSTEM (S MODE) 268
METHOD OF USING TROUBLESHOOTING CHARTS 269
S-1 STARTING PERFORMANCE IS POOR (STARTING ALWAYS TAKES TIME) 273
S-2 ENGINE DOES NOT START 274
(1)ENGINE DOES NOT TURN 274
(2)ENGINE TURNS BUT NO EXHAUST SMOKE COMES OUT (FUEL IS NOT BEING INJECTED) 275
(3)EXHAUST SMOKE COMES OUT BUT ENGINE DOES NOT START (FUEL IS BEING INJECTED) 276
S-3 ENGINE DOES NOT PICK UP SMOOTHLY (FOLLOW-UP IS POOR) 277
S-4 ENGINE STOPS DURING OPERATIONS 278
S-5 ENGINE DOES NOT ROTATE SMOOTHLY (HUNTING) 279
S-6 ENGINE LACKS OUTPUT (NO POWER) 280
S-7 EXHAUST SMOKE IS BLACK (INCOMPLETE COMBUSTION) 281
S-8 OIL CONSUMPTION IS EXCESSIVE (OR EXHAUST SMOKE IS BLUE) 282
S-9 OIL BECOMES CONTAMINATED QUICKLY 283
S-10 FUEL CONSUMPTION IS EXCESSIVE 284
S-11 OIL IS IN IN COOLING WATER,OR WATER SPURTS BACK,OR WATER LEVEL GOES DOWN 285
S-12 OIL PRESSURE CAUTION LAMP LIGHTS UP (DROP IN OIL PRESSURE) 286
S-13 OIL LEVEL RISES (WATER,FUEL IN OIL) 287
S-14 WATER TEMPERATURE BECOMES TOO HIGH (OVERHEATING) 288
S-15 ABNORMAL NOISE IS MADE 289
S-16 VIBRATION IS EXCESSIVE 290
TROUBLESHOOTING OF CONTROLLER,ELECTRICAL SYSTEM(E MODE) 291
ELECTRICAL CIRCUIT DIAGRAM FOR CONTROLLER SYSTEM 293
ELECTRICAL CIRCUIT DIAGRAM FOR ENGINE START,PREHEAT,STOP SYSTEM 295
ELECTRICAL CIRCUIT DIAGRAM FOR MACHINE MONITOR SYSTEM 296
ACTION TAKEN BY SELF-DIAGNOSTIC FUNCTION AND PROBLEMS ON MACHINE 297
JUDGEMENT TABLE FOR CHASSIS RELATED PARTS 301
E-101 ERROR CODE [EE] (ABNORMALITY IN CONTROLLER POWER SOURCE SYSTEM OR COMMUNICATIONS SYSTEM) IS DISPLAYED 303
a) ABNORMALITY IN CONTROLLER POWER SOURCE SYSTEM 303
b) ABNORMALITY IN COMMUNICATIONS SYSTEM 304
E-102 ERROR CODE [31] (ABNORMALITY IN BOOM POTENTIOMETER SYSTEM) IS DISPLAYED 305
E-103 ERROR CODE [41] (ABNORMALITY IN ROTATION SENSOR SYSTEM) IS DISPLAYED 306
E-104 ERROR CODE [42] (ABNORMALITY IN FUEL CONTROL DIAL POTENTIOMETER SYSTEM) IS DISPLAYED 307
E-105 ERROR CODE [44] (ABNORMALITY IN FEEDBACK POTENTIOMETER SYSTEM) IN DISPLAYED 308
E-106 ERROR CODE [54] (ABNORMALITY IN SWING HOLDING BRAKE SOLENOID SYSTEM) IS DISPLAYED 309
E-107 ERROR CODE [58] (ABNORMALITY IN PUMP MERGE/DIVIDER SOLENOID SYSTEM) IS DISPLAYED 310
E-108 ERROR CODE [62] (ABNORMALITY IN ACCELERATOR MOTOR (+) RELAY SYSTEM) IS DISPLAYED 311
E-109 ERROR CODE [64] (ABNORMALITY IN 2-STAGE RELIEF SOLENOID SYSTEM) IS DISPLAYED 312
E-110 ERROR CODE [68] (ABNORMALITY IN ACCELERATOR MOTOR (-) RELAY SYSTEM) IS DISPLAYED 313
E-111 ERROR CODE [71] (ABNORMALITY IN BOOM RAISE STOP SOLENOID SYSTEM) IS DISPLAYED 314
E-112 ERROR CODE [74] (ABNORMALITY IN PC-EPC SOLENOID SYSTEM) IS DISPLAYED 315
E-113 ERROR CODE [81] (ABNORMALITY IN PC-EPC SOLENOID SYSTEM) IS DISPLAYED 316
E-114 ERROR CODE [C1] (BOOM RAISE,BOOM LOWER PRESSURE SWITCHES INPUT AT SAME TIME FOR MORE THAN 3 SECONDS) IS DISPLAYED 316
E-115 WORK EQUIPMENT DOES NOT MOVE EVEN WHEN WORK EQUIPMENT LOCK LEVER IS RELEASED 317
E-116 WORK EQUIPMENT LOCK LEVER IS AT LOCK POSITION BUT WORK EQUIPMENT MOVES 318
E-117 ELECTRICAL SYSTEM CANCEL SWITCH IS NOT TURNED ON,BUT ALARM BUZZER SOUNDS FOR 7 SECONDS AND ELECTRICAL SYSTEM CAUTION LAMP FLASHES 319
E-118 BOOM CUSHION HAS NO EFFECT 320
E-119 SWING DOES NOT WORK (WHEN NO ERROR DISPLAY IS GIVEN) 321
E-120 EXCESSIVE HYDRAULIC DRIFT OF SWING 322
E-121 ENGINE DOES NOT START 323
a) STARTING MOTOR DOES NOT TURN 323
b) ENGINE STOP SOLENOID DOES NOT WORK 325
E-122 ENGINE DOES NOT STOP 326
E-123 AUTO-DECELERATION IS ACTUATED EVEN WHEN AUTO-DECELERATION SWITCH IS OFF 327
E-124 AUTO-DECELERATION IS NOT ACTUATED WHEN AUTO-DECELERATION SWITCH IS SWITCHED ON 328
E-125 ENGINE ROTATION IS IRREGULAR 329
E-126 WIPER DOES NOT WORK 330
TROUBLESHOOTING OF CONTROLLER INPUT SIGNAL SYSTEM (F MODE) 331
F-1 MONITOR DISPLAY DOES NOT SHOW [P1] (BOOM RAISE PRESSURE SWITCH) 332
F-2 MONITOR DISPLAY DOES NOT SHOW [P2] (BOOM LOWER PRESSURE SWITCH) 333
F-3 MONITOR DISPLAY DOES NOT SHOW [P3] (SWING PRESSURE SWITCH) 334
F-4 MONITOR DISPLAY DOES NOT SHOW [P5] (ARM IN PRESSURE SWITCH) 335
F-5 MONITOR DISPLAY DOES NOT SHOW [P7] (TRAVEL PRESSURE SWITCH) 336
F-6 MONITOR DISPLAY DOES NOT SHOW [P9] (ARM OUT,BUCKET,OFFSET PRESSURE SWITCH) 337
F-7 CONTROLLER DISPLAY DOES NOT SHOW [UP] POWER MAX SIGNAL (KNOB SWITCH SIGNAL) 338
F-8 CONTROLLER DISPLAY DOES NOT SHOW [Hi] (TRAVEL SPEED BOOST SWITCH) 339
TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H MODE) 340
TABLE OF FAILURE MODES AND CAUSES FOR HYDRAULIC AND MECHANICAL SYSTEM 341
PUMP MERGE/DIVIDER LOGIC 345
H-1 SPEEDS OF ALL WORK EQUIPMENT,SWING,TRAVLE ARE SLOW OR LACK POWER 346
H-2 THERE IS EXCESSIVE DROP IN ENGINE SPEED,OR ENGINE STALLS 348
H-3 NO WORK EQUIPMENT,TRAVEL,SWING MOVE 349
H-4 ABNORMAL NOISE GENERATED (AROUND PUMP) 349
H-5 AUTO-DECELERATION DOES NOT WORK (PPC SHUTTLE VALVE IS EQUIPPED ONLY IN TRAVEL PPC VALVE) 350
H-6 FINE CONTROL ABILITY IS POOR OR RESPONSE IS POOR 350
H-7 BOOM IS SLOW OR LACKS POWER 351
H-8 ARM IS SLOW OR LACKS POWER 353
H-9 BUCKET IS SLOW OR LACKS POWER 355
H-10 WORK EQUIPMENT (BOOM,ARM,BUCKET) DOES NOT MOVE (BUT TRAVEL AND SWING ARE NORMAL) 356
H-11 EXCESSIVE HYDRAULIC DRIFT (BOOM,ARM,OR BUCKET) 356
H-12 EXCESSIVE TIME LAG (ENGINE AT LOW IDLING) 357
H-13 OTHER EQUIPMENT MOVES WHEN SINGLE CIRCUIT IS RELIEVED 357
H-14 LACK OF POWER WHEN PRESSURE RISES 358
H-15 IN COMPOUND OPERATIONS,WORK EQUIPMENT WITH LARGER LOAD IS SLOW 358
H-16 IN SWING + BOOM RAISE,BOOM RAISE IS SLOW 359
H-17 IN SWING + TRAVEL,TRAVEL SPEED DROPS EXCESSIVELY 359
H-18 TRAVEL DEVIATION 360
H-19 TRAVLE SPEED IS SLOW 361
H-20 STEERING DOES NOT TURN EASILY OR LACKS POWER 363
H-21 TRAVEL SPEED DOES NOT SWITCH OR IS FASTER THAN SPECIFIED SPEED 365
H-22 TRAVEL DOES NOT MOVE (ONE SIDE ONLY) 365
H-23 DOES NOT SWING 366
H-24 SWING ACCELERATION IS POOR OR SWING SPEED IS SLOW 367
H-25 EXCESSIVE OVERRUN WHEN STOPPING SWING 369
H-26 EXCESSIVE SHOCK WHEN STOPPING SWING (ONE DIRECTION ONLY) 370
H-27 EXCESSIVE ABNORMAL NOISE WHEN STOPPING SWING 370
H-28 EXCESSIVE HYDRAULIC DRIFT OF SWING 371
TROUBLESHOOTING OF MACHINE MONITOR SYSTEM(M MODE) 372
CHASSIS MONITOR SYSTEM ELECTRICAL CIRCUIT DIAGRAM 373
M-1 WHEN STARTING SWITCH IS TURNED ON,NOTHING IS DISPLAYED (NOTHING LIGHTS UP FOR 3 SEC ) 374
M-2 WHEN STARTING SWITCH IS TURNED ON,ALL LAMPS LIGHT UP,BUT THEY DO NOT GO OUT AFTER 3 SEC 374
M-3 WHEN STARTING SWITCH IS TURNED ON,SOME LAMPS DO NOT LIGHT UP FOR 3 SEC 375
a) NO GAUGES LIGHT UP 375
b) ELECTRIC SYSTEM CAUTION LAMP DOES NOT LIGHT UP 375
c) CHARGE LEVEL CAUTION LAMP DOES NOT LIGHT UP 375
d) ENGINE OIL PRESSURE CAUTION LAMP DOES NOT LIGHT UP 375
M-4 WHEN STARTING SWITCH IS AT ON (ENGINE STOPPED),CHARGE LEVEL CAUTION LAMP DOES NOT LIGHT UP 376
M-5 WHEN STARTING SWITCH IS AT ON (ENGINE STOPPED),ENGINE OIL PRESSURE CAUTION LAMP DOES NOT LIGHT UP 376
M-6 PREHEATING PILOT LAMP DOES NOT LIGHT UP DURING PREHEATING 377
M-7 ENGINE OIL PRESSURE CAUTION LAMP LIGHTS UP WHEN ENGINE IS RUNNING (ENGINE OIL PRESSURE IS NORMAL) 377
M-8 CHARGE LEVEL CAUTION LAMP LIGHTS UP WHEN ENGINE IS RUNNING 378
M-9 ABNORMALITY IN COOLANT TEMPERATURE SYSTEM IS DISPLAYED 379
a) AFTER ENGINE STARTS,LEVEL STAYS AT BOTTOM AND DOES NOT GO UP 379
b) AFTER ENGINE STARTS,LEVEL GOES UP IMMEDIATELY (ENTERS RED RANGE EVEN THOUGH THERE IS NO OVERHEATING) 379
M-10 ABNORMAL DISPLAY IS GIVEN FOR FUEL GAUGE SYSTEM 380
a) ALL FUEL LEVEL GAUGE SEGMENTS GO OUT 380
b) FUEL LEVEL HAS GONE DOWN,BUT FUEL GAUGE CONTINUES TO DISPLAY FULL 380
c) EVEN WHEN FUEL TANK IS FILLED,FUEL LEVEL GAUGE DOES NOT SHOW FULL 381
M-11 WHEN STARTING SWITCH IS ON (ENGINE STOPPED),ENGINE OIL LEVEL CAUTION LAMP FLASHES 381
M-12 DEFECTIVE OPERATION OF ALARM BUZZER 382
a) BUZZER DOES NOT SOUND 382
b) BUZZER DOES NOT STOP SOUNDING 382
M-13 SERVICE METER DOES NOT MOVE WHEN ENGINE IS RUNNIGN 383
a) WHEN CHARGE LEVEL CAUTION LAMP DOES NOT LIGHT UP 383
b) WHEN CHARGE LEVEL CAUTION LAMP LIGHTS UP 383
M-14 NIGHT LIGHTING DOES NOT LIGHT UP 384
a) COOLANT TEMPERATURE GAUGE, FUEL GAUGE,DEPTH DISPLAY DO NOT LIGHT UP 384
b) SERVICE METER DOES NOT LIGHT UP 384
M-15 ELECTRIC SYSTEM CAUTION LAMP STAYS LIGHTED UP (THERE IS NO ABNORMALITY DISPLAY ON CONTROLLER,OPERATION IS NORMAL) 385
30 DISASSEMBLY AND ASSEMBLY 386
METHOD OF USING MANUAL 388
PRECAUTIONS WHEN CARRYING OUT OPERATION 390
SPECIAL TOOL LIST 393
SKETCHES OF SPECIAL TOOLS 396
STARING MOTOR 397
REMOVAL AND INSTALLATION 397
ALTERNATOR 398
REMOVAL AND INSTALLATION 398
ENGINE OIL COOLER CORE 399
REMOVAL AND INSTALLATION 399
FUEL INJECTION PUMP 400
REMOVAL 400
INSTALLATION 403
WATER PUMP 405
REMOVAL AND INSTALLATION 405
NOZZLE HOLDER 406
REMOVAL AND INSTALLATION 406
TURBOCHARGER 407
REMOVAL AND INSTALLATION 407
THERMOSTAT 408
REMOVAL AND INSTALLATION 408
CYLINDER HEAD 409
REMOVAL 409
INSTALLATION 413
ENGINE,MAIN PUMP 416
REMOVAL 416
INSTALLATION 419
DAMPER 420
REMOVAL AND INSTALLATION 420
ENGINE FRONT SEAL 421
REMOVAL AND INSTALLATION 421
ENGINE REAR SEAL 423
REMOVAL 423
INSTALLATION 424
RADIATOR,HYDRAULIC COOLER 425
REMOVAL 425
INSTALLATION 426
FUEL TANK 427
REMOVAL 427
INSTALLATION 428
CENTER SWIVEL JOINT 429
REMOVAL 429
INSTALLATION 430
CENTER SWIVEL JOINT 431
DISASSEMBLY AND ASSEMBLY 431
SPROCKET 432
REMOVAL AND INSTALLATION 432
FINAL DRIVE,TRAVEL MOTOR 433
REMOVAL AND INSTALLATION 433
FINAL DRIVE 434
DISASSEMBLY 434
ASSEMBLY 437
DISASSEMBLY AND ASSEMBLY OF TRAVEL MOTOR 442
ASSEMBLY DRAWINGS 443
PARTS LIST 449
TOOLS LIST FOR DISASSEMBLY AND ASSEMBLY 451
1 STANDARD TOOLS 451
2 MANUFACTURED TOOLS 452
DISASSEMBLY PROCEDURE 454
1 GENERAL PRECAUTIONS 454
2 DISASSEMBLY PROCEDURE 455
2-1 DISASSEMBLY OF BRAKE VALVE 457
2-2 DISASSEMBLY OF HYDRAULIC MOTOR 461
2-3 DISASSEMBLY OF REDUCTION GEAR ASSEMBLY 464
MAINTENANCE STANDARD 469
1 SEALS 469
2 MAINTENANCE STANDARD FOR WORM PARTS 469
ASSEMBLY PROCEDURE 471
1 GENERAL PRECAUTIONS 471
2 ASSEMBLY PROCEDURE 472
2-1 ASSEMBLY OF BRAKE VALVE 472
2-2 ASSEMBLY OF REDUCTION GEAR ASSEMBLY AND HYDRAULIC MOTOR 476
PERFORMANCE TEST 491
LIST OF CLEARANCE ADJUSTMENT PARTS 492
SWING MOTOR,SWING MACHINERY 493
REMOVAL AND INSTALLATION 493
SWING MACHINERY 494
DISASSEMBLY 494
ASSEMBLY 498
SWING MOTOR 503
REMOVAL AND INSTALLATION 503
REVOLVING FRAME 504
REMOVAL 504
INSTALLATION 505
SWING CIRCLE 506
REMOVAL 506
INSTALLATION 507
IDLER,RECOIL SPRING 508
REMOVAL AND INSTALLATION 508
RECOIL SPRING 509
DISASSEMBLY 509
ASSEMBLY 510
IDLER 511
DISASSEMBLY 511
ASSEMBLY 512
TRACK ROLLER 514
REMOVAL AND INSTALLATION 514
DISASSEMBLY 515
ASSEMBLY 516
CARRIER ROLLER 518
REMOVAL AND INSTALLATION 518
DISASSEMBLY 519
ASSEMBLY 520
TRACK SHOE 522
REMOVAL AND INSTALLATION 522
HYDRAULIC TANK 523
REMOVAL AND INSTALLATION 523
MAIN PUMP 524
REMOVAL 524
INSTALLATION 525
EPC VALVE 526
REMOVAL AND INSTALLATION 526
PC VALVE 527
REMOVAL AND INSTALLATION 527
LS VALVE 528
REMOVAL AND INSTALLATION 528
CONTROL VALVE 529
REMOVAL 529
INSTALLATION 531
DISASSEMBLY 532
ASSEMBLY 537
LS SELECT VALVE 543
DISASSEMBLY AND ASSEMBLY 543
PRESSURE COMPENSATION VALVE 544
DISASSEMBLY 544
ASSEMBLY 545
MAIN RELIEF VALVE 546
REMOVAL AND INSTALLATION 546
DISASSEMBLY AND ASSEMBLY 547
SOLENOID VALVE 548
REMOVAL AND INSTALLATION 548
PUMP MERGE/DIVIDER SOLENOID VALVE 549
REMOVAL AND INSTALLATION 549
2-STAGE RELIEF,TRAVEL HI/LO SOLENOID VALVE 550
REMOVAL AND INSTALLATION 550
INTERFERENCE PREVENTION SOLENOID VALVE 551
REMOVAL AND INSTALLATION 551
LEFT WORK EQUIPMENT PPC VALVE (FOR SWING, ARM CONTROL) 552
REMOVAL AND INSTALLATION 552
RIGHT WORK EQUIPMENT PPC VALVE (FOR BOOM,BUCKET CONTROL) 553
REMOVAL AND INSTALLATION 553
WORK EQUIPMENT PPC VALVE (PPC VALVE FOR BOOM,BUCKET,ARM,SWING CONTROL) 554
DISASSEMBLY 554
ASSEMBLY 555
TRAVEL PPC VALVE 556
REMOVAL AND INSTALLATION 556
DISASSEMBLY AND ASSEMBLY 557
PPC VALVE FOR OFFSET CONTROL 558
REMOVAL AND INSTALLATION 558
BOOM LOCK VALVE 559
REMOVAL AND INSTALLATION 559
BOOM CYLINDER 560
REMOVAL 560
INSTALLATION 561
ARM CYLINDER 562
REMOVAL 562
INSTALLATION 563
BUCKET CYLINDER 564
REMOVAL 564
INSTALLATION 565
OFFSET CYLINDER 566
REMOVAL 566
INSTALLATION 567
HYDRAULIC CYLINDER FOR OFFSET 568
DISASSEMBLY 568
ASSEMBLY 570
HYDRAULIC CYLINDER FOR BOOM,ARM,BUCKET 572
DISASSEMBLY 572
ASSEMBLY 575
BUCKET 579
REMOVAL 579
INSTALLATION 580
ARM 581
REMOVAL 581
INSTALLATION 582
BUCKET,ARM 585
REMOVAL 585
INSTALLATION 586
OFFSET BRACKET 589
REMOVAL AND INSTALLATION 589
2ND BOOM 590
REMOVAL 590
INSTALLATION 591
1ST BOOM 592
REMOVAL 592
INSTALLATION 594
2ND,1ST BOOM 595
REMOVAL 595
INSTALLATION 597
OFFSET BRACKET,2ND,1ST BOOM 598
REMOVAL 598
INSTALLATION 600
BOOM 601
REMOVAL 601
INSTALLATION 602
OPERATOR’S CAB 603
REMOVAL 603
INSTALLATION 604
FLOOR FRAME 605
REMOVAL 605
INSTALLATION 606
AIR CONDITIONER COMPRESSOR 607
REMOVAL AND INSTALLATION 607
AIR CONDITIONER CONDENSER 608
REMOVAL AND INSTALLATION 608
AIR CONDITIONER UNIT 609
REMOVAL 609
INSTALLATION 610
COUNTERWEIGHT 611
REMOVAL AND INSTALLATION 611
CONTROLLER 612
REMOVAL AND INSTALLATION 612
MONITOR 613
REMOVAL AND INSTALLATION 613
40 MAINTENANCE STANDARD 614
FINAL DRIVE 615
SWING CIRCLE 617
SWING MACHINERY 618
TRACK FRAME・RECOIL SPRING 620
IDLER 621
CARRIER ROLLER 623
TRACK ROLLER 624
TRACK SHOE 625
HYDRAULIC PUMP 630
CONTROL VALVE 631
SELF-REDUCING PRESSURE VALVE 639
SWING MOTOR 640
TRAVEL MOTOR 641
WORK EQUIPMENT・SWING PPC VALVE 642
TRAVEL PPC VALVE 643
SERVICE PPC VALVE 644
LS-EPC VALVE 645
SOLENOID VALVE 646
CENTER SWIVEL JOINT 647
BOOM HOLDING VALVE 648
HYDRAULIC CYLINDER 649
WORK EQUIPMENT 651
DIMENSION OF WORK EQUIPMENT 653
90 OTHERS 657
HYDRAULIC CIRCUIT DIAGRAM 658
PC228USLC-1 658
PC228US-2,PC228USLC-2 659
ELECTRICAL CIRCUIT DIAGRAM 660
PC228USLC-1 660
PC228US-2,PC228USLC-2 661
S.V 18/12/24
