KOMATSU PC270LC-6 HYDRAULIC EXCAVATOR OPERATION & MAINTENANCE MANUAL (SN:A83001 & UP) – PDF DOWNLOAD

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KOMATSU PC270LC-6 HYDRAULIC EXCAVATOR OPERATION & MAINTENANCE MANUAL (SN:A83001 & UP)

KOMATSU PC270LC-6 HYDRAULIC EXCAVATOR OPERATION & MAINTENANCE MANUAL (SN:A83001 & UP) – PDF DOWNLOAD:

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KOMATSU PC270LC-6 HYDRAULIC EXCAVATOR OPERATION & MAINTENANCE MANUAL (SN:A83001 & UP)

• This manual describes procedures for operation, handling, lubrication, maintenance, checking, and adjustment. It will help the operator and maintenance personnel realize peak performance through effective, economical and safe machine operation and maintenance.
• Keep this manual handy and have all personnel read it periodically. If this manual is lost or becomes dirty and can not be read, request a replacement manual from your local distributor. If you sell the machine, be sure to give this manual to the new owner.
• Continuing improvements in the design of this machine can lead to changes in detail, which may not be reflected in this manual. Consult your local distributor or Komatsu America International Co. for the latest available information on your machine or for questions regarding information in this manual

Table of Contents:

KOMATSU PC270LC-6 HYDRAULIC EXCAVATOR OPERATION & MAINTENANCE MANUAL (SN:A83001 & UP)

MAIN MENU.......................................................................................................................................  0
COVER...........................................................................................................................................  1
INTRODUCTION....................................................................................................................................  4
	1. FORWARD..................................................................................................................................  5
	2. SAFETY INFORMATION.......................................................................................................................  6
	3. INTRODUCTION.............................................................................................................................  7
		3.1 INTENDED USE........................................................................................................................  7
		3.2 FEATURES............................................................................................................................  7
		3.3 BREAKING IN THE MACHINE.............................................................................................................  7
	4. LOCATION OF PLATES, TABLE TO ENTER P.I.N AND DISTRIBUTOR.................................................................................  8
		4.1 P.I.N. PLATE LOCATION...............................................................................................................  8
		4.2 ENGINE SERIAL NUMBER PLATE..........................................................................................................  8
		4.3 TABLE TO ENTER NUMBERS AND DISTRIBUTOR..............................................................................................  8
	5. TABLE OF CONTENTS........................................................................................................................  9
SAFETY.......................................................................................................................................... 16
	6. GENERAL PRECAUTIONS...................................................................................................................... 17
	7. PRECAUTIONS DURING OPERATION............................................................................................................. 25
		7.1 BEFORE STARTING ENGINE.............................................................................................................. 25
		7.2 OPERATING MACHINE................................................................................................................... 27
		7.3 TRANSPORTATION...................................................................................................................... 33
		7.4 BATTERY............................................................................................................................. 35
		7.5 TOWING.............................................................................................................................. 37
		7.6 BUCKET WITH HOOK.................................................................................................................... 38
	8. PRECAUTIONS FOR MAINTENANCE.............................................................................................................. 39
		8.1 BEFORE CARRYING OUT MAINTENANCE..................................................................................................... 39
		8.2 DURING MAINTENANCE.................................................................................................................. 43
	9. POSITION FOR ATTACHING SAFETY LABELS..................................................................................................... 49
OPERATION....................................................................................................................................... 53
	10. GENERAL VIEW............................................................................................................................ 54
		10.1 GENERAL VIEW OF MACHINE............................................................................................................ 54
		10.2 GENERAL VIEW OF OPERATORS COMPARTMENT.............................................................................................. 55
		10.3 GENERAL VIEW OF MONITOR PANEL...................................................................................................... 56
	11. EXPLANATION OF COMPONENTS............................................................................................................... 57
		11.1 MACHINE MONITOR.................................................................................................................... 57
			11.1.1 MONITOR LIGHT GROUP.......................................................................................................... 59
			11.1.2 METER DISPLAY PORTION........................................................................................................ 61
			11.1.3 SWITCHES..................................................................................................................... 64
		11.2 SWITCHES........................................................................................................................... 67
			11.2.1 STARTING SWITCH.............................................................................................................. 67
			11.2.2 FUEL CONTROL DIAL............................................................................................................ 68
			11.2.3 CIGARETTE LIGHTER............................................................................................................ 68
			11.2.4 SWING LOCK SWITCH............................................................................................................ 68
			11.2.5 WIPER SWITCH................................................................................................................. 68
			11.2.6 LIGHT SWITCH................................................................................................................. 69
			11.2.7 ALARM BUZZER STOP SWITCH..................................................................................................... 69
			11.2.8 CAB HEATER FAN SWITCH........................................................................................................ 69
			11.2.9 HORN SWITCH.................................................................................................................. 69
			11.2.10 KNOB SWITCH................................................................................................................. 69
			11.2.11 CAB LIGHT SWITCH............................................................................................................ 69
			11.2.12 PUMP CONTROL OVERRIDE SWITCH................................................................................................ 70
			11.2.13 SWING LOCK OVERRIDE SWITCH.................................................................................................. 70
		11.3 CONTROL LEVERS AND PEDALS.......................................................................................................... 71
			11.3.1 SAFETY LOCK LEVER............................................................................................................ 71
			11.3.2 TRAVEL LEVERS................................................................................................................ 72
			11.3.3 LEFT WORK EQUIPMENT CONTROL LEVER............................................................................................ 72
			11.3.4 RIGHT WORK EQUIPMENT CONTROL LEVER........................................................................................... 73
			11.3.5 ATTACHMENT CONTROL PEDAL..................................................................................................... 74
			11.3.6 SELECTOR VALVES FOR BREAKER AND GENERAL ATTACHMENT (crusher etc.)............................................................ 74
		11.4 SEAT BELT.......................................................................................................................... 75
			11.4.1 FASTEN THE BELT AND REMOVE IT................................................................................................ 75
			11.4.2 ADJUST THE BELT LENGTH....................................................................................................... 76
		11.5 ROOF VENT.......................................................................................................................... 76
		11.6 FRONT WINDOW WARNING............................................................................................................... 77
			11.6.1 WHEN OPENING................................................................................................................. 77
			11.6.2 WHEN CLOSING................................................................................................................. 78
			11.6.3 FRONT BOTTOM WINDOW.......................................................................................................... 79
		11.7 DOOR LOCK.......................................................................................................................... 80
		11.8 CAP, COVER WITH LOCK............................................................................................................... 80
			11.8.1 METHOD OF OPENING AND CLOSING LOCK CAP....................................................................................... 80
			11.8.2 METHOD OF OPENING AND CLOSING COVER LOCK..................................................................................... 81
		11.9 HOT AND COOL BOX................................................................................................................... 81
		11.10 STORAGE BOX....................................................................................................................... 81
		11.11 ASHTRAY........................................................................................................................... 81
		11.12 AIR CONDITIONER................................................................................................................... 82
			11.12.1 GENERAL LOCATIONS ON CONTROL PANEL.......................................................................................... 82
			11.12.2 PRECAUTIONS WHEN USING AIR CONDITIONER...................................................................................... 84
			11.12.3 CHECK, MAINTAIN AIR CONDITIONER............................................................................................. 84
		11.13 CAB HEATER........................................................................................................................ 85
			11.13.1 GENERAL LOCATIONS........................................................................................................... 85
		11.14 PREPARATION FOR CAB HEATER........................................................................................................ 86
		11.15 AM/FM RADIO....................................................................................................................... 87
			11.15.1 EXPLANATION OF COMPONENTS................................................................................................... 87
			11.15.2 METHOD OF OPERATION......................................................................................................... 89
			11.15.3 PRECAUTIONS WHEN USING...................................................................................................... 90
			11.15.4 SPECIFICATIONS.............................................................................................................. 91
		11.16 ELECTRIC POWER TAKE OUT ADAPTER................................................................................................... 91
		11.17 FUSE.............................................................................................................................. 92
		11.18 FUSIBLE LINK...................................................................................................................... 93
		11.19 CONTROLLERS....................................................................................................................... 93
		11.20 TOOL BOX.......................................................................................................................... 93
		11.21 GREASE GUN HOLDER................................................................................................................. 93
		11.22 HANDLING ACCUMULATOR WARNING...................................................................................................... 94
	12. OPERATION............................................................................................................................... 95
		12.1 CHECK BEFORE STARTING ENGINE....................................................................................................... 95
			12.1.1 WALK AROUND CHECK............................................................................................................ 95
			12.1.2 CHECK BEFORE STARTING........................................................................................................ 97
			12.1.3 ADJUST BEFORE OPERATION......................................................................................................100
			12.1.4 OPERATIONS AND CHECKS BEFORE STARTING ENGINE.................................................................................104
		12.2 STARTING ENGINE....................................................................................................................106
			12.2.1 NORMAL STARTING..............................................................................................................106
			12.2.2 STARTING IN COLD WEATHER.....................................................................................................107
		12.3 OPERATIONS AND CHECKS AFTER ENGINE STARTS WARNING..................................................................................109
			12.3.1 WHEN NORMAL..................................................................................................................109
			12.3.2 IN COLD AREAS (AUTOMATIC WARM UP OPERATION)..................................................................................111
		12.4 MOVING MACHINE.....................................................................................................................115
			12.4.1 MOVING MACHINE FORWARD.......................................................................................................115
			12.4.2 MOVING MACHINE REARWARD......................................................................................................117
		12.5 STEERING MACHINE...................................................................................................................119
			12.5.1 STEERING (CHANGING DIRECTION)................................................................................................119
		12.6 STOPPING MACHINE WARNING...........................................................................................................121
		12.7 SWINGING WARNING...................................................................................................................122
		12.8 OPERATION OF WORK EQUIPMENT WARNING................................................................................................123
		12.9 HANDLING ACTIVE MODE...............................................................................................................124
		12.10 HANDLING WORKING MODE.............................................................................................................126
			12.10.1 WORKING MODE................................................................................................................126
			12.10.2 POWER MAX., SWIFT SLOW DOWN.................................................................................................127
		12.11 PROHIBITED OPERATIONS WARNING.....................................................................................................128
			12.11.1 USING SWING FORCE...........................................................................................................128
			12.11.2 USING TRAVEL FORCE..........................................................................................................128
			12.11.3 OPERATE CYLINDERS TO END OF STROKE..........................................................................................128
			12.11.4 USING DROPPING FORCE OF BUCKET..............................................................................................129
			12.11.5 USING DROPPING FORCE OF MACHINE.............................................................................................129
			12.11.6 DIGGING ROCKY GROUND........................................................................................................129
			12.11.7 SUDDEN LEVER SHIFT DURING HI-SPEED TRAVEL...................................................................................129
		12.12 PRECAUTIONS FOR OPERATION.........................................................................................................130
			12.12.1 PRECAUTIONS WHEN TRAVELING..................................................................................................130
			12.12.2 PRECAUTIONS AT HI-SPEED TRAVEL..............................................................................................130
			12.12.3 PERMISSIBLE WATER DEPTH.....................................................................................................130
		12.13 PRECAUTIONS WHEN TRAVELING ON HILLS WARNING.......................................................................................131
			12.13.1 BRAKING WHEN TRAVELING DOWNHILL.............................................................................................132
			12.13.2 IF SHOES SLIP...............................................................................................................132
			12.13.3 IF ENGINE STOPS.............................................................................................................132
			12.13.4 PRECAUTIONS ON SLOPES.......................................................................................................132
		12.14 HOW TO ESCAPE FROM MUD............................................................................................................133
			12.14.1 WHEN ONE SIDE IS STUCK......................................................................................................133
			12.14.2 WHEN BOTH SIDES ARE STUCK...................................................................................................133
		12.15 WORK POSSIBLE WITH HYDRAULIC EXCAVATOR............................................................................................133
			12.15.1 BACKHOE WORK................................................................................................................133
			12.15.2 SHOVEL WORK.................................................................................................................134
			12.15.3 DITCHING WORK...............................................................................................................134
			12.15.4 LOADING WORK................................................................................................................134
		12.16 REPLACE OR INVERT BUCKET WARNING..................................................................................................135
			12.16.1 REPLACEMENT.................................................................................................................135
			12.16.2 INVERSION...................................................................................................................136
		12.17 PARKING MACHINE WARNING...........................................................................................................137
		12.18 CHECK AFTER FINISHING WORK........................................................................................................138
		12.19 STOPPING ENGINE...................................................................................................................139
		12.20 CHECK AFTER STOPPING ENGINE.......................................................................................................139
		12.21 LOCKING...........................................................................................................................140
	13.TRANSPORTATION...........................................................................................................................141
		13.1 TRANSPORTATION PROCEDURE...........................................................................................................141
		13.2 LOADING, UNLOADING OF TRAILERS WARNING.............................................................................................141
			13.2.1 LOADING......................................................................................................................142
			13.2.2 UNLOADING....................................................................................................................143
			13.2.3 SECURING MACHINE.............................................................................................................144
			13.2.4 REMOVAL, INSTALLATION OF MIRRORS.............................................................................................145
			13.2.5 METHOD OF LIFTING MACHINE....................................................................................................146
		13.3 PRECAUTIONS FOR TRANSPORTATION.....................................................................................................147
	14. COLD WEATHER OPERATION..................................................................................................................148
		14.1 PRECAUTIONS FOR LOW TEMPERATURE....................................................................................................148
			14.1.1 FUEL AND LUBRICANTS..........................................................................................................148
			14.1.2 COOLANT......................................................................................................................148
			14.1.3 BATTERY......................................................................................................................148
		14.2 PRECAUTIONS AFTER COMPLETION OF WORK ..............................................................................................150
		14.3 AFTER COLD WEATHER.................................................................................................................150
	15. LONG TERM STORAGE.......................................................................................................................151
		15.1 BEFORE STORAGE.....................................................................................................................151
		15.2 DURING STORAGE WARNING.............................................................................................................151
		15.3 AFTER STORAGE......................................................................................................................152
		15.4 STARTING MACHINE AFTER LONG TERM STORAGE...........................................................................................152
	16. TROUBLESHOOTING.........................................................................................................................153
		16.1 PHENOMENA THAT ARE NOT FAILURES....................................................................................................153
		16.2 METHOD OF TOWING MACHINE WARNING...................................................................................................153
		16.3 METHOD FOR LIGHT WEIGHT TOWING WARNING.............................................................................................153
		16.4 PRECAUTION ON PARTICULAR JOB SITES.................................................................................................153
		16.5 IF BATTERY IS DISCHARGED WARNING...................................................................................................154
			16.5.1 REMOVING AND INSTALLING BATTERY..............................................................................................154
			16.5.2 PRECAUTIONS FOR CHARGING BATTERY.............................................................................................155
			16.5.3 STARTING ENGINE WITH BOOSTER CABLE...........................................................................................155
		16.6 OTHER TROUBLE......................................................................................................................157
			16.6.1 ELECTRICAL SYSTEM............................................................................................................157
			16.6.2 CHASSIS......................................................................................................................158
			16.6.3 ENGINE.......................................................................................................................159
			16.6.4 ELECTRONIC CONTROL SYSTEM....................................................................................................160
MAINTENANCE.....................................................................................................................................161
	17. GUIDES TO MAINTENANCE...................................................................................................................162
	18. OUTLINES OF SERVICE.....................................................................................................................164
		18.1 OUTLINE OF OIL, FUEL, COOLANT......................................................................................................164
			18.1.1 OIL..........................................................................................................................164
			18.1.2 FUEL.........................................................................................................................164
			18.1.3 COOLANT......................................................................................................................165
			18.1.4 GREASE.......................................................................................................................165
			18.1.5 STORING OIL AND FUEL.........................................................................................................165
			18.1.6 FILTERS......................................................................................................................165
		18.2 OUTLINE OF ELECTRICAL SYSTEM.......................................................................................................166
		18.3 OUTLINE OF HYDRAULIC SYSTEM........................................................................................................166
		18.4 OUTLINE OF FUEL SYSTEM.............................................................................................................167
			18.4.1 FUEL INJECTION PUMP..........................................................................................................167
			18.4.2 FUEL TANK....................................................................................................................167
	19. WEAR PARTS LIST.........................................................................................................................168
	20. FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE...........................................................................169
		20.1 PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS...................................................................................169
		20.2 ENGINE OIL SPECIFICATIONS..........................................................................................................170
			20.2.1 NORMAL OPERATION.............................................................................................................170
			20.2.2 ARCTIC OPERATION.............................................................................................................171
		20.3 DAMPER CASE, SWING MACHINERY CASE, TRACK FRONT IDLERS, TRACK ROLLERS, TOP CARRIER ROLLERS AND HYDRAULIC SYSTEM OIL SPECIFIC........171
		20.4 FINAL DRIVE OIL SPECIFICATIONS.....................................................................................................171
		20.5 DIESEL FUEL SPECIFICATIONS WARNING.................................................................................................171
		20.6 COOLANT SPECIFICATIONS.............................................................................................................172
			20.6.1 GENERAL......................................................................................................................172
			20.6.2 WATER........................................................................................................................172
			20.6.3 ANTIFREEZE...................................................................................................................173
	21. STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS..........................................................................................175
		21.1 INTRODUCTION OF NECESSARY TOOLS....................................................................................................175
		21.2 TORQUE LIST........................................................................................................................176
	22. PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS...........................................................................................177
	23. MAINTENANCE SCHEDULE CHART..............................................................................................................180
		23.1 SCHEDULED MAINTENANCE CHART........................................................................................................180
		23.2 MAINTENANCE INTERVAL WHEN USING HYDRAULIC BREAKER..................................................................................182
	24. SERVICE PROCEDURE.......................................................................................................................183
		24.1 INITIAL 250 HOURS SERVICE..........................................................................................................183
			24.1.1 REPLACE FUEL FILTER CARTRIDGE................................................................................................183
		24.2 WHEN REQUIRED......................................................................................................................184
			24.2.1 CHECK, CLEAN AND REPLACE AIR CLEANER ELEMENT.................................................................................184
			24.2.2 CLEAN INSIDE OF COOLING SYSTEM...............................................................................................187
			24.2.3 CHECK AND TIGHTEN TRACK SHOE BOLTS...........................................................................................191
			24.2.4 CHECK AND ADJUST TRACK TENSION...............................................................................................192
			24.2.5 CHECK ELECTRICAL INTAKE AIR HEATER...........................................................................................193
			24.2.6 INSTALLATION OF BUCKET TEETH.................................................................................................194
			24.2.7 REMOVAL OF BUCKET TEETH......................................................................................................196
			24.2.8 ADJUST BUCKET CLEARANCE......................................................................................................198
			24.2.9 CHECK WINDOW WASHER FLUID....................................................................................................199
			24.2.10 CHECK, MAINTAIN AIR CONDITIONER.............................................................................................200
			24.2.11 REPLACE ADD ON BREAKER FILTER ELEMENT.......................................................................................201
			24.2.12 CLEAN IN LINE FILTER........................................................................................................202
		24.3 CHECK BEFORE STARTING..............................................................................................................203
			24.3.1 CHECK COOLANT LEVEL, ADD COOLANT.............................................................................................203
			24.3.2 CHECK OIL LEVEL IN ENGINE OIL PAN............................................................................................203
			24.3.3 CHECK FUEL LEVEL.............................................................................................................204
			24.3.4 CHECK OIL LEVEL IN HYDRAULIC TANK............................................................................................204
			24.3.5 CHECK AIR CLEANER FOR CLOGGING...............................................................................................205
			24.3.6 CHECK ELECTRICAL WIRING......................................................................................................205
			24.3.7 CHECK FUNCTION OF HORN.......................................................................................................205
			24.3.8 DRAIN WATER FROM FUEL WATER SEPARATOR........................................................................................206
		24.4 EVERY 100 HOURS SERVICE............................................................................................................207
			24.4.1 LUBRICATION..................................................................................................................207
			24.4.2 CHECK OIL LEVEL IN SWING MACHINERY CASE......................................................................................209
			24.4.3 DRAIN WATER AND SEDIMENT FROM FUEL TANK......................................................................................209
		24.5 EVERY 250 HOURS SERVICE............................................................................................................210
			24.5.1 CHECK OIL LEVEL IN FINAL DRIVE CASE, ADD OIL.................................................................................210
			24.5.2 CHECK LEVEL OF BATTERY ELECTROLYTE...........................................................................................210
			24.5.3 REPLACE HYDRAULIC FILTER ELEMENT.............................................................................................211
			24.5.4 LUBRICATE SWING CIRCLE (3 POINTS)............................................................................................212
			24.5.5 CHECK FAN BELT TENSION, ADJUST...............................................................................................213
			24.5.6 AIR CONDITIONER COMPRESSOR BELT TENSION......................................................................................214
		24.6 EVERY 500 HOURS SERVICE............................................................................................................215
			24.6.1 REPLACE FUEL FILTER CARTRIDGE AND FUEL- WATER SEPARATOR......................................................................215
			24.6.2 CHECK SWING PINION GREASE LEVEL, ADD GREASE..................................................................................217
			24.6.3 CLEAN AND INSPECT RADIATOR FINS, OIL COOLER FINS, AFTERCOOLER FINS AND CONDENSER FINS (ONLY FOR MACHINES EQUIPPED WITH AI....218
			24.6.4 CLEAN FRESH/RECIRC AIR FILTERS OF AIR CONDITIONER............................................................................219
			24.6.5 REPLACE HYDRAULIC TANK BREATHER ELEMENT......................................................................................219
			24.6.6 CHANGE ENGINE OIL, REPLACE FILTER............................................................................................220
			24.6.7 REPLACE IN LINE FUEL STRAINER................................................................................................222
		24.7 EVERY 1000 HOURS SERVICE...........................................................................................................223
			24.7.1 CHANGE OIL IN SWING MACHINERY CASE...........................................................................................223
			24.7.2 CHECK OIL LEVEL IN DAMPER CASE, ADD OIL......................................................................................224
			24.7.3 CHECK TIGHTENING PARTS OF  TURBOCHARGER......................................................................................224
			24.7.4 CHECK PLAY OF TURBOCHARGER ROTOR.............................................................................................224
			24.7.5 CHECK DRIVE BELT, TENSIONER BEARING AND FAN HUB..............................................................................225
		24.8 EVERY 2000 HOURS SERVICE...........................................................................................................226
			24.8.1 CHANGE OIL IN FINAL DRIVE CASE...............................................................................................226
			24.8.2 CLEAN HYDRAULIC TANK STRAINER................................................................................................227
			24.8.3 CLEAN, CHECK TURBOCHARGER....................................................................................................227
			24.8.4 CHECK ALTERNATOR, STARTING MOTOR.............................................................................................227
			24.8.5 CHECK VIBRATION DAMPER.......................................................................................................227
			24.8.6 CHANGE ANTIFREEZE............................................................................................................227
			24.8.7 CHECK AND ADJUST VALVE CLEARANCE.............................................................................................228
		24.9 EVERY 4000 HOURS SERVICE...........................................................................................................230
			24.9.1 CHECK WATER PUMP.............................................................................................................230
		24.10 EVERY 5000 HOURS SERVICE..........................................................................................................231
			24.10.1 CHANGE OIL IN HYDRAULIC TANK................................................................................................231
SPECIFICATIONS..................................................................................................................................235
	25. MACHINE SPECIFICATIONS..................................................................................................................236
		25.1 GENERAL............................................................................................................................236
		25.2 WORKING RANGE......................................................................................................................238
OPTIONS, ATTACHMENTS............................................................................................................................240
	26. GENERAL PRECAUTIONS.....................................................................................................................241
		26.1 PRECAUTIONS RELATED TO SAFETY......................................................................................................241
		26.2 PRECAUTIONS WHEN INSTALLING ATTACHMENTS WARNING....................................................................................242
	27. BUCKET WITH HOOK........................................................................................................................243
		27.1 CHECKING FOR DAMAGE................................................................................................................243
		27.2 PROHIBITED OPERATIONS..............................................................................................................243
		27.3 PRECAUTIONS DURING OPERATIONS......................................................................................................243
	28. HANDLING HEATER.........................................................................................................................244
		28.1 GENERAL LOCATIONS..................................................................................................................244
		28.2 PREPARATION FOR CAR HEATER.........................................................................................................245
	29. HANDLING AIR CONDITIONER................................................................................................................246
		29.1 DEFROSTER SELECTOR LEVER...........................................................................................................246
		29.2 PRECAUTIONS WHEN USING AIR CONDITIONER.............................................................................................247
	30. MACHINES READY FOR ATTACHMENT...........................................................................................................248
		30.1 GENERAL LOCATIONS..................................................................................................................248
			30.1.1 STOP VALVE...................................................................................................................248
			30.1.2 SELECTOR VALVE...............................................................................................................249
			30.1.3 CONTROL PEDAL................................................................................................................249
			30.1.4 LOCK PIN.....................................................................................................................249
			30.1.5 ADDITIONAL FILTER FOR BREAKER................................................................................................249
			30.1.6 ACCUMULATOR..................................................................................................................250
		30.2 HYDRAULIC CIRCUIT..................................................................................................................250
			30.2.1 SWITCHING TO FILTER CIRCUIT..................................................................................................250
			30.2.2 CONNECTING HYDRAULIC CIRCUIT.................................................................................................251
			30.2.3 PATH OF OIL FLOW.............................................................................................................251
		30.3 PROCEDURE FOR REMOVAL AND..........................................................................................................251
			30.3.1 PROCEDURE FOR REMOVAL........................................................................................................252
			30.3.2 PROCEDURE FOR INSTALLATION...................................................................................................252
		30.4 OPERATION WARNING..................................................................................................................253
			30.4.1 WHEN USING BREAKER...........................................................................................................253
			30.4.2 WHEN USING GENERAL ATTACHMENT................................................................................................254
		30.5 LONG TERM STORAGE..................................................................................................................254
		30.6 SPECIFICATIONS.....................................................................................................................254
	31. INTRODUCTION OF ATTACHMENTS.............................................................................................................255
		31.1 BUCKET SELECTION...................................................................................................................255
			31.1.1 STANDARD DUTY PLATE BUCKET...................................................................................................255
			31.1.2 HEAVY DUTY PLATE BUCKET......................................................................................................255
			31.1.3 HEAVY DUTY CAST LIP BUCKET...................................................................................................255
		31.2 ATTACHMENT INSTALLATION COMBINATION TABLE..........................................................................................256
			31.2.1 PC270LC-6....................................................................................................................256
		31.3 SELECTION OF TRACK SHOES...........................................................................................................257
		31.4 BACKHOE CONTROL PATTERN CONVERSION.................................................................................................258
	32. EXTENDING MACHINE SERVICE LIFE..........................................................................................................259
		32.1 HYDRAULIC BREAKER..................................................................................................................259
			32.1.1 MAIN FIELDS OF APPLICATION...................................................................................................259
			32.1.2 MISTAKEN METHODS OF USE......................................................................................................260
			32.1.3 GREASING POSITION FOR HYDRAULIC BREAKER......................................................................................262
		32.2 CRUSHER............................................................................................................................262
			32.2.1 MAIN FIELDS OF APPLICATION...................................................................................................262
			32.2.2 MISTAKEN METHODS OF USE......................................................................................................263
		32.3 GRAB FORK..........................................................................................................................264
			32.3.1 MAIN FIELDS OF APPLICATION...................................................................................................264
			32.3.2 MISTAKEN METHODS OF USE......................................................................................................264
		32.4 GRAPPLE BUCKET.....................................................................................................................265
			32.4.1 MAIN FIELDS OF APPLICATION...................................................................................................265
			32.4.2 MISTAKEN METHODS OF USE......................................................................................................265
		32.5 SCRAP GRAPPLE......................................................................................................................266
			32.5.1 MAIN FIELDS OF APPLICATION...................................................................................................266
			32.5.2 MISTAKEN METHODS OF USE......................................................................................................266
		32.6 CRUSHER AND CUTTER.................................................................................................................267
			32.6.1 MAIN FIELDS OF APPLICATION...................................................................................................267
			32.6.2 MISTAKEN METHODS OF USE......................................................................................................267
		32.7 HYDRAULIC PILE DRIVER..............................................................................................................268
			32.7.1 MAIN FIELDS OF APPLICATION...................................................................................................268
			32.7.2 MISTAKEN METHODS OF USE......................................................................................................268

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