Description
Komatsu PW75R-2 Hydraulic Excavator Shop Manual (WEBM001601)
Komatsu PW75R-2 Hydraulic Excavator Index:
COVER
CONTENTS
LIST OF REVISED PAGES
SAFETY
FOREWORD
HOW TO READ THE SHOP MANUAL
HOISTING INSTRUCTIONS
STANDARD TIGHTENING TORQUE
COATING MATERIALS
ELECTRIC WIRE CODE
WEIGHT TABLE
TABLE OF OIL AND COOLANT QUANTITIES
10.STRUCTURE AND FUNCTION
P.T.O.
POWER TRAIN
FRONT AXLE
TRANSMISSION (2WS)
REAR AXLE
STEERING SYSTEM (2WS)
TRANSMISSION (4WS)
REAR AXLE (4WS)
STEERING SYSTEM (4WS)
STEERING UNIT
SWING CIRCLE
SWING MACHINERY
HYDRAULIC CIRCUIT (2WS)
HYDRAULIC CIRCUIT (4WS)
HYDRAULIC CIRCUIT (LOWER EQUIPMENT)
HYDRAULIC PUMP
MAIN HYDRAULIC PUMP
PC VALVE, LS VALVE, SERVO PISTON
LS VALVE
PC VALVE (POWER CONTROL)
PRIORITY VALVE
CONTROL VALVE
SWING MOTOR
SWIVEL JOINT
TRAVEL MOTOR
DISPLACEMENT AUTOMATIC CONTROL HIGH PRESSURE RELATED
TRAVEL MOTOR BRAKE VALVES
CYLINDERS
SERVOCONTROL FEED UNIT
ACCUMULATORS
PPC VALVE
PPC VALVE (BLADE, BOOM SWING, 2-PIECE BOOM)
TRAVEL PPC VALVE
BRAKE PUMP
BOOM AND ARM SAFETY VALVE
2-PIECE BOOM SAFETY VALVE
BLADE OR OUTRIGGER SAFETY VALVE
OVER LOAD SENSOR SWITCH
SOLENOID VALVE GROUP ST1 (Y5-Y6-Y7-Y11)
SOLENOID VALVE GROUP ST2 (Y4-Y10-Y12)
SOLENOID VALVE GROUP ST3 (Y1-Y2)
SOLENOID VALVE GROUP OP1 (Y21-Y22-Y23-Y24)
SOLENOID VALVE GROUP OP2 (Y26)
SOLENOID VALVE GROUP OP3 (Y8-Y9)
ELECTRICAL DIAGRAM (2WS) (1/5)
ELECTRICAL DIAGRAM (2WS) (2/5)
ELECTRICAL DIAGRAM (2WS) (3/5)
ELECTRICAL DIAGRAM (2WS) (4/5)
ELECTRICAL DIAGRAM (2WS) (5/5)
ELECTRICAL DIAGRAM (4WS) (1/5)
ELECTRICAL DIAGRAM (4WS) (2/5)
ELECTRICAL DIAGRAM (4WS) (3/5)
ELECTRICAL DIAGRAM (4WS) (4/5)
ELECTRICAL DIAGRAM (4WS) (5/5)
20.TESTING AND ADJUSTMENTS
NORMAL OR STANDARD TECHNICAL DATA
SPECIAL TOOLS
MEASURING THE ENGINE SPEED
ADJUSTING VALVE CLEARANCE
MEASURING COMPRESSION PRESSURE
TESTING AND ADJUSTING FUEL INJECTION TIMING
TESTING AND ADJUSTING FAN BEL TENSION
ADJUSTING THE STROKE OF THE ACCELERATOR LEVER
ADJUSTING PPC VALVES CLEARANCE
ADJUSTING THE SAFETY MICROSWITCH
MEASURING THE SWING CIRCLE AXIAL CLEARANCE
AIR BLEEDING FROM HYDRAULIC CIRCUITS
RELEASING RESIDUAL PRESSURE
CHECKING AND REGULATING PRESSURE IN THE HYDRAULIC CIRCUITS
TESTING AND SETTING OF MAIN VALVES
ADJUSTING PC VALVE
MEASURING LS DIFFERENTIAL PRESSURE AND ADJUSTING LS VALVE
CHECKING AND ADJUSTING PRESSURES IN THE SERVOCONTROL FEED UNIT
MEASURING PUMPS DELIVERY AND FLOW CONTROL STARTING POINT PUMP P1
CHECKING THAT THE PRIORITY VALVE IS FUNCTIONING CORRECTLY
CHECKING AND REGULATING THE PRESSURE OF THE STEERING SYSTEM
CHECKING LEAKAGES IN THE STEERING CYLINDERS
CHECKING THE BRAKING SYSTEM
CHECKING WEAR IN THE BRAKE DISKS
ADJUSTING BRAKING DISKS CLEARANCE
BLEEDING AIR FROM THE BRAKE LINES
ADJUSTING THE PARKING BRAKE
TRAVEL HYDRAULIC EQUIPMENT CHECKING PROCEDURE
CHECKING AND ADJUSTING THE AUTOMATIC DISPLACEMENT CONTROL SYSTEM OF THE TRAVEL MOTOR
CHECKING FOR LEAKAGES IN THE TRAVEL MOTOR
CHECKING AND ADJUSTING THE SPEED OF THE TRAVEL PROPELLER SHAFT
ADJUSTMENT OF THE SPEED SURVEYOR
ADJUSTING BOOM AND ARM SAFETY VALVES
ADJUSTING 2nd BOOM SAFETY VALVES
MEASURING AND SETTING OF PRESSURE SWITCH SIGNAL OVERLOAD OPERATION
MEASUREMENT OF INTERNAL OIL LEAKAGES IN THE SWING MOTOR
CHECKING FOR LEAKAGES INSIDE THE SWIVEL JOINT
ANALYSIS OF THE CAUSES OF HYDRAULIC DRIFTS
30.DISASSEMBLY AND ASSEMBLY
HOW TO READ THE MANUAL
PRECAUTIONS TO BE TAKEN WHEN WORKING
SPECIAL TOOLS
STARTER MOTOR
ALTERNATOR
INJECTION PUMP
NOZZLE HOLDER
CYLINDER HEAD
SEAT
CABIN
ENGINE HOOD
FRONT HOOD
HEATING FAN
RADIATOR
FUEL TANK
HYDRAULIC OIL TANK
ENGINE-PUMP GROUP
PUMP GROUP
ENGINE-PUMP COUPLING JOINT
MAIN PUMP INPUT SHAFT OIL SEAL
GEAR-PUMP
SWIVEL JOINT
SWING MOTOR
SWING GEARED MOTOR
SWING MACHINERY ASSEMBLY
CONTROL VALVE
REVOLVING FRAME
COUNTERWEIGHT
SWING CIRCLE
TRANSMISSION – REVERSER, DIRECTION INDICATOR AND HEADLIGHT DIPPER BEAM CONTROL GROUP
R.H. PPC VALVE (BOOM – BUCKET)
L.H. PPC VALVE (ARM-SWING)
OUTRIGGER AND BLADE PPC VALVE
BOOM SWING PPC VALVE
TRAVEL AND 2nd BOOM PPC VALVE
BRAKE PUMP
STEERING UNIT
PRIORITY VALVE
TRAVEL MOTOR
TRANSMISSION
AXLE LOCKING CYLINDERS
COMPLETE FRONT AXLE
COMPLETE REAR AXLE
AXLES
BOOM CYLINDER (FOR 1-PIECE BOOM)
BOOM CYLINDER (FOR 2-PIECE BOOM)
2nd BOOM CYLINDERS
ARM CYLINDER
BUCKET CYLINDER
BOOM SWING CYLINDER
CYLINDERS FOR OUTRIGGERS OR BLADE
WORK EQUIPMENT CYLINDERS
WORK EQUIPMENT (FOR 1-PIECE BOOM)
WORK EQUIPMENT (FOR 2-PIECE BOOM)
BUCKET
ARM
2nd BOOM
BOOM
1st BOOM
SWING BRACKET
BLADE AND OUTRIGGERS
BLADE AND OUTRIGGERS ARMS
40.MAINTENANCE STANDARD
P.T.O.
FRONT AXLE
TRANSMISSION (2WS)
REAR AXLE (2WS)
TRANSMISSION (4WS)
REAR AXLE (4WS)
SWING CIRCLE
SWING MACHINERY
HYDRAULIC PUMP
CONTROL VALVE
SWING MOTOR
SWIVEL JOINT
TRAVEL MOTOR
TRAVEL MOTOR BRAKE VALVES
SERVOCONTROL FEED UNIT
TRAVEL PPC VALVE
PPC VALVE
BLADE SAFETY VALVE
CYLINDERS
WORK EQUIPMENT (1-PIECE BOOM)
WORK EQUIPMENT (2-PIECE BOOM
