KOMATSU PC75R-2 HYDRAULIC EXCAVATOR SHOP MANUAL WEBM004000 – PDF

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KOMATSU PC75R-2 HYDRAULIC EXCAVATOR SHOP MANUAL WEBM004000 – PDF DOWNLOAD

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KOMATSU PC75R-2 HYDRAULIC EXCAVATOR SHOP MANUAL WEBM004000 – PDF DOWNLOAD

Language : English
Pages : 364
Downloadable : Yes
File Type : PDF

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TABLE OF CONTENTS:

KOMATSU PC75R-2 HYDRAULIC EXCAVATOR SHOP MANUAL WEBM004000 – PDF DOWNLOAD

MAIN MENU.................................................................  0
COVER.....................................................................  1
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......................................................... 14
ELECTRIC WIRE CODE........................................................ 15
WEIGHT TABLE.............................................................. 16
TABLE OF OIL COOLANT QUANTITIES........................................... 17
10. STRUCTURE AND FUNCTION................................................ 21
	P.T.O................................................................. 22
	POWER TRAIN........................................................... 23
	TRACK FRAME........................................................... 25
	IDLER AND RECOIL SPRING............................................... 26
	CARRIER ROLLER........................................................ 27
	TRACK ROLLER.......................................................... 27
	TRACK SHOE............................................................ 28
	SWING CIRCLE.......................................................... 29
	SWING MACHINERY....................................................... 30
	HYDRAULIC CIRCUIT DIAGRAM (STANDARD).................................. 31
	HYDRAULIC CIRCUIT DIAGRAM (2-PIECE BOOM).............................. 33
	HYDRAULIC PUMP........................................................ 34
	9-SPOOL CONTROL VALVE (STANDARD)...................................... 60
	10-SPOOL CONTROL VALVE (STANDARD+2-PIECE BOOM)........................ 62
	SWING MOTOR........................................................... 90
	CENTER SWIVEL JOINT................................................... 94
	TRAVEL MOTOR.......................................................... 96
	PARKING BRAKE......................................................... 98
	BRAKE VALVE........................................................... 99
	TRAVEL MOTOR..........................................................101
	REDUCTION GEAR........................................................103
	CYLINDERS.............................................................104
	SERVOCONTROL FEED UNIT................................................106
	ACCUMULATOR...........................................................111
	PPC VALVE (WORK EQUIPMENT)............................................112
	PPC VALVE (BLADE, BOOM SWING, 2-PIECE BOOM)...........................116
	TRAVEL PPC VALVE......................................................120
	BOOM AND ARM SAFETY VALVE.............................................125
	BLADE SAFETY VALVE....................................................126
	2-PIECE BOOM SAFETY VALVE.............................................127
	OVERLOAD SENSOR SWITCH................................................128
	SOLENOID VALVE........................................................129
	ELECTRICAL DIAGRAM (1/3)..............................................131
	ELECTRICAL DIAGRAM (2/3)..............................................133
	ELECTRICAL DIAGRAM (3/3)..............................................135
20. TESTING AND ADJUSTING.................................................139
	NORMAL OR STANDARD TECHNICAL DATA.....................................140
	SPECIAL TOOLS.........................................................157
	MEASURING THE ENGINE SPEED............................................159
	ADJUSTING VALVE CLEARANCE.............................................160
	MEASURING COMPRESSION PRESSURE........................................161
	TESTING AND ADJUSTING FUEL INJECTION TIMING...........................162
	TESTING AND ADJUSTING FAN BELT TENSION................................164
	ADJUSTING THE STROKE OF THE ACCELERATOR LEVER.........................165
	ADJUSTING PPC VALVE CLEARANCE.........................................166
	ADJUSTING THE SAFETY MICROSWITCH......................................167
	MEASURING THE SWING CIRCLE AXIAL CLEARANCE............................168
	TESTING AND ADJUSTING TRACK-SHOE TENSION..............................169
	AIR BLEEDING FROM HYDRAULIC CIRCUITS..................................170
	RELEASING RESIDUAL PRESSURE FROM THE CIRCUITS.........................173
	CHECKING AND REGULATING PRESSURE IN THE HYDRAULIC CIRCUITS............174
	TESTING AND SETTING OF MAIN VALVES....................................175
	ADJUSTING PC VALVE....................................................177
	MEASURING LS DIFFERENTIAL PRESSURE AND ADJUSTING LS VALVE.............178
	CHECKING AND ADJUSTING PRESSURES IN THE SERVOCONTROL FEED UNIT........180
	MEASURING PUMPS DELIVERY AND FLOW CONTROL STARTING POINT PUMP P1......181
	MEASURING TRAVEL DEVIATION............................................183
	ADJUSTING THE MAXIMUM SPEED OF THE TRAVEL MOTORS......................184
	MEASURING INNER OIL LEAKAGE OF TRAVEL MOTOR...........................185
	ADJUSTING BOOM AND ARM SAFETY VALVES..................................186
	ADJUSTING 2nd BOOM SAFETY VALVES......................................187
	MEASURING AND SETTING OF PRESSURE SWITCH SIGNAL OVERLOAD OPERATION....188
	MEASUREMENT OF INTERNAL OIL LEAKAGES IN THE SWING MOTOR...............189
	CHECKING FOR LEAKAGES INSIDE THE SWIVEL JOINT.........................190
	ANALYSIS OF THE CAUSES OF HYDRAULIC DRIFTS............................192
30. DISASSEMBLY AND ASSEMBLY..............................................201
	HOW TO READ THE MANUAL................................................203
	PRECAUTIONS TO BE TAKEN WHEN WORKING..................................204
	SPECIAL TOOLS.........................................................205
	STARTER MOTOR.........................................................207
		REMOVAL AND INSTALLATION..........................................207
	ALTERNATOR............................................................208
		REMOVAL AND INSTALLATION..........................................208
	INJECTION PUMP........................................................209
		REMOVAL...........................................................209
		INSTALLATION......................................................212
	NOZZLE HOLDER.........................................................213
		REMOVAL AND INSTALLATION..........................................213
	CYLINDER HEAD.........................................................214
		REMOVAL...........................................................214
		INSTALLATION......................................................216
	SEAT..................................................................217
		REMOVAL AND INSTALLATION..........................................217
	CABIN.................................................................218
		REMOVAL AND INSTALLATION..........................................218
	ENGINE HOOD...........................................................219
		REMOVAL AND INSTALLATION..........................................219
	FRONT HOOD............................................................220
		REMOVAL AND INSTALLATION..........................................220
	HEATING FAN...........................................................221
		REMOVAL AND INSTALLATION..........................................221
	RADIATOR..............................................................222
		REMOVAL...........................................................222
		INSTALLATION......................................................223
	FUEL TANK.............................................................224
		REMOVAL...........................................................224
		INSTALLATION......................................................225
	HYDRAULIC OIL TANK....................................................226
		REMOVAL AND INSTALLATION..........................................226
	ENGINE-PUMP GROUP.....................................................227
		REMOVAL...........................................................227
		INSTALLATION......................................................230
	PUMP GROUP............................................................231
		REMOVAL...........................................................231
		INSTALLATION......................................................232
	ENGINE-PUMP COUPLING JOINT............................................233
		REMOVAL AND INSTALLATION..........................................233
	MAIN PUMP INPUT SHAFT OIL SEAL........................................234
		REMOVAL AND INSTALLATION..........................................234
	GEAR PUMP.............................................................235
		REMOVAL AND INSTALLATION..........................................235
	SWIVEL JOINT..........................................................236
		REMOVAL AND INSTALLATION..........................................236
	SWING MOTOR...........................................................237
		REMOVAL AND INSTALLATION..........................................237
	SWING MACHINERY.......................................................238
		REMOVAL AND INSTALLATION..........................................238
		DISASSEMBLY.......................................................239
		ASSEMBLY..........................................................242
	CONTROL VALVE.........................................................245
		REMOVAL AND INSTALLATION..........................................245
	REVOLVING FRAME.......................................................246
		REMOVAL...........................................................246
		INSTALLATION......................................................247
	COUNTERWEIGHT.........................................................248
		REMOVAL AND INSTALLATION..........................................248
	SWING CIRCLE..........................................................249
		REMOVAL AND INSTALLATION..........................................249
	TRACK SHOES...........................................................250
		REMOVAL AND INSTALLATION..........................................250
	SPROCKET ASSEMBLY.....................................................251
		REMOVAL AND INSTALLATION..........................................251
	TRAVEL GEAR MOTOR.....................................................252
		REMOVAL AND INSTALLATION..........................................252
		DISASSEMBLY.......................................................253
		ASSEMBLY..........................................................268
	BALL BEARING PRELOAD..................................................283
		ADJUSTING.........................................................283
	AXIAL CLEARANCE ON TAPERED ROLLER BEARINGS............................284
		ADJUSTING.........................................................284
	IDLER AND RECOIL SPRING ASSEMBLY......................................285
		REMOVAL AND INSTALLATION..........................................285
	IDLER.................................................................286
		DISASSEMBLY AND ASSEMBLY..........................................286
	RECOIL SPRING GROUP AND CYLINDER......................................287
		DISASSEMBLY AND ASSEMBLY..........................................287
	TRACK ROLLER..........................................................288
		REMOVAL AND INSTALLATION..........................................288
	CARRIER ROLLER........................................................289
		REMOVAL AND INSTALLATION..........................................289
	R.H. PPC VALVE (BOOM-BUCKET)..........................................290
		REMOVAL...........................................................290
		INSTALLATION......................................................291
	L.H. PPC VALVE (ARM-SWING)............................................292
		REMOVAL...........................................................292
		INSTALLATION......................................................293
	BLADE PPC VALVE.......................................................294
		REMOVAL AND INSTALLATION..........................................294
	TRAVEL PEDAL CONTROL..................................................295
		REMOVAL AND INSTALLATION..........................................295
	1st BOOM SWING PEDAL CONTROL..........................................296
		REMOVAL AND INSTALLATION..........................................296
	BOOM CYLINDER (FOR 1-PIECE BOOM)......................................297
		REMOVAL AND INSTALLATION..........................................297
	BOOM CYLINDER (FOR 2-PIECE BOOM)......................................298
		REMOVAL...........................................................298
		INSTALLATION......................................................299
	2nd BOOM CYLINDERS....................................................300
		REMOVAL...........................................................300
		INSTALLATION......................................................301
	ARM CYLINDER..........................................................302
		REMOVAL AND INSTALLATION..........................................302
	BUCKET CYLINDER.......................................................303
		REMOVAL AND INSTALLATION..........................................303
	BOOM SWING CYLINDER...................................................304
		REMOVAL AND INSTALLATION..........................................304
	BLADE CYLINDER........................................................305
		REMOVAL AND INSTALLATION..........................................305
	WORK EQUIPMENT CYLINDERS..............................................306
		DISASSEMBLY.......................................................306
		ASSEMBLY..........................................................307
	WORK EQUIPMENT (FOR 1-PIECE BOOM).....................................311
		REMOVAL AND INSTALLATION..........................................311
	WORK EQUIPMENT (FOR 2-PIECE BOOM).....................................312
		REMOVAL...........................................................312
		INSTALLATION......................................................313
	BUCKET................................................................314
		REMOVAL AND INSTALLATION..........................................314
	ARM...................................................................315
		REMOVAL...........................................................315
		INSTALLATION......................................................317
	2nd BOOM..............................................................318
		REMOVAL...........................................................318
		INSTALLATION......................................................319
	BOOM (FOR 1-PIECE BOOM)...............................................320
		REMOVAL AND INSTALLATION..........................................320
	1st BOOM..............................................................321
		REMOVAL...........................................................321
		INSTALLATION......................................................322
	SWING BRACKET.........................................................323
		REMOVAL AND INSTALLATION..........................................323
	BLADE.................................................................324
		REMOVAL AND INSTALLATION..........................................324
40. MAINTENANCE STANDARD..................................................327
	P.T.O.................................................................328
	SWING CIRCLE..........................................................329
	TRACK FRAME...........................................................330
	IDLER.................................................................331
	CARRIER ROLLER........................................................332
	TRACK ROLLER..........................................................333
	TRACK SHOE............................................................334
	SPROCKET..............................................................335
	SWING MACHINERY.......................................................336
	HYDRAULIC PUMP........................................................337
	CONTROL VALVE.........................................................338
	SWING MOTOR...........................................................348
	SWIVEL JOINT..........................................................349
	TRAVEL MOTOR..........................................................350
	SERVOCONTROL FEED UNIT................................................352
	TRAVEL PPC VALVE......................................................353
	PPC VALVE.............................................................354
	BLADE SAFETY VALVE....................................................356
	CYLINDERS.............................................................358
	WORK EQUIPMENT (1-PIECE BOOM).........................................360
	WORK EQUIPMENT (2-PIECE BOOM).........................................362

DESCRIPTION:

KOMATSU PC75R-2 HYDRAULIC EXCAVATOR SHOP MANUAL WEBM004000 – PDF DOWNLOAD

This shop manual has been prepared as an aid to improve the quality of repairs by giving the operator 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.
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 understanding 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.

S.S 18/12/24