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KOMATSU PC75R-2 HYDRAULIC EXCAVATOR SHOP MANUAL WEBM001501 – PDF DOWNLOAD
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Description
KOMATSU PC75R-2 HYDRAULIC EXCAVATOR SHOP MANUAL WEBM001501 – PDF DOWNLOAD
FILE DETAILS:
KOMATSU PC75R-2 HYDRAULIC EXCAVATOR SHOP MANUAL WEBM001501 – PDF DOWNLOAD
Language : English
Pages : 364
Downloadable : Yes
File Type : PDF
IMAGES PREVIEW OF THE MANUAL:
TABLE OF CONTENTS:
KOMATSU PC75R-2 HYDRAULIC EXCAVATOR SHOP MANUAL WEBM001501 – PDF DOWNLOAD
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 AND 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 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 MAIN HYDRAULIC PUMP................................................... 35 PC VALVE, LS VALVE, SERVO PISTON...................................... 40 LS VALVE.............................................................. 41 PC VALVE (POWER CONTROL).............................................. 51 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.............................................................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 SOLENOID VALVE GROUP ST1...............................129 SOLENOID VALVE GROUP OP1 (Y3-Y4)......................................130 ELECTRICAL DIAGRAM (1/3)..............................................131 ELECTRICAL DIAGRAM (2/3)..............................................133 ELECTRICAL DIAGRAM (3/3)..............................................135 20.TESTING AND ADJUSTMENTS............................................139 NORMAL OR STANDARD TECHNICAL DATA.....................................140 EQUIPMENT FOR TESTING, ADJUSTING, AND IDENTIFYING FRAULTS.............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 BEL 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 ALTERNATOR............................................................208 INJECTION PUMP........................................................209 NOZZLE HOLDER.........................................................213 CYLINDER HEAD.........................................................214 SEAT..................................................................217 CABIN.................................................................218 ENGINE HOOD...........................................................219 FRONT HOOD............................................................220 HEATING FAN...........................................................221 RADIATOR..............................................................222 FUEL TANK.............................................................224 HYDRAULIC OIL TANK....................................................226 ENGINE-PUMP GROUP.....................................................227 PUMP GROUP............................................................231 ENGINE-PUMP COUPLING JOINT............................................233 MAIN PUMP INPUT SHAFT OIL SEAL........................................234 GEAR-PUMP.............................................................235 SWIVEL JOINT..........................................................236 SWING MOTOR...........................................................237 SWING MACHINERY.......................................................238 CONTROL VALVE.........................................................245 REVOLVING FRAME.......................................................246 COUNTERWEIGHT.........................................................248 SWING CIRCLE..........................................................249 TRACK SHOES...........................................................250 SPROCKET ASSEMBLY.....................................................251 TRAVEL GEARED MOTOR...................................................252 ADJUSTING BALL BEARING PRELOAD........................................283 ADJUSTING AXIAL CLEARANCE ON TAPERED ROLLER BEARINGS..................284 IDLER AND RECOIL SPRING ASSEMBLY......................................285 IDLER.................................................................286 RECOIL SPRING GROUP AND CYLINDER......................................287 TRACK ROLLER..........................................................288 CARRIER ROLLER........................................................289 R.H. PPC VALVE (BOOM-BUCKET)..........................................290 L.H. PPC VALVE (ARM-SWING)............................................292 BLADE PPC VALVE.......................................................294 TRAVEL PEDAL CONTROL..................................................295 1st BOOM SWING PEDAL CONTROL..........................................296 BOOM CYLINDER (FOR 1-PIECE BOOM)......................................297 BOOM CYLINDER (FOR 2-PIECE BOOM)......................................298 2nd BOOM CYLINDERS....................................................300 ARM CYLINDER..........................................................302 BUCKET CYLINDER.......................................................303 BOOM SWING CYLINDER...................................................304 BLADE CYLINDER........................................................305 WORK EQUIPMENT CYLINDERS..............................................306 WORK EQUIPMENT (FOR 1-PIECE BOOM).....................................311 WORK EQUIPMENT (FOR 2-PIECE BOOM).....................................312 BUCKET................................................................314 ARM...................................................................315 2nd BOOM..............................................................318 BOOM (FOR 1-PIECE BOOM)...............................................320 1st BOOM..............................................................321 SWING BRACKET.........................................................323 BLADE.................................................................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 WEBM001501 – 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.
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.
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.
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.
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.
This section gives the judgement standards when inspecting disassembled parts.
S.S 18/12/24
