Komatsu Excavator PC750SE-6K PC750LC-6K service & repair manual

Description Komatsu Excavator PC750SE-6K PC750LC-6K service & repair manual

Komatsu Hydraulic Excavator PC750SE-6K, PC750LC-6K pd workshop service repair manual + operation & maintenance manual

Serial number K32001 and up

MANUAL CONTENT:
GENERAL
Specification drawings
Specifications
Weight table
Fuel, coolant and lubricants

STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
PTO
PTO Lubrication system
Power train
Swing machinery
Swing circle
Final drive
Track frame and Recoil spring
Idler
Carrier roller
Track roller
Track shoe
Motor grease pump
Hydraulic tank
Hydraulic pump
Line oil filter
Pilot oil filter
Drain oil filter
L.H. 5-spool control valve
R.H. 4-spool control valve
Straight-travel valve
Swing motor
Center swivel joint
Travel motor
PPC control relief valve
Safety lock valve
PPC accumulator
Valve control
Work equipment, swing PPC valve
Travel PPC valve
Solenoid valve
Hydraulic cylinder
Work equipment
Dimensions of work equipment
Air conditioner
Engine control
Machine control system
Monitor system
Sensors

TESTING AND ADJUSTING
Standard value table for engine
Standard value table for chassis
Standard value table for electrical parts
Tools for testing, adjusting, and troubleshooting
Measuring air supply pressure (boost pressure)
Measuring exhaust temperature
Measuring exhaust color
Adjusting valve clearance
Measuring blow-by pressure
Measuring compression pressure
Measuring engine oil pressure
Handling equipment in fuel circuit
Releasing remaining pressure in fuel system
Measuring fuel pressure
Reduced cylinder mode operation for engine
Bleeding air from fuel circuit
Checking for leakage in fuel circuit
Testing and adjusting alternator belt tension
Testing and adjusting fan belt tension
Testing and adjusting air conditioner compressor drive belt tension
Handling engine controller high voltage circuit
Adjusting engine speed sensor
Testing and adjusting hydraulic pressure in work equipment, swing, travel circuit
Testing and adjusting control pump circuit oil pressure
Testing and adjusting piston pump control pressure
Measuring servo piston stroke
Measuring PPC valve output pressure
Testing solenoid valve output pressure
Adjusting work equipment swing PPC valve
Testing travel deviation
Testing locations causing hydraulic drift of work equipment
Measuring oil leakage
Testing clearance of swing circle bearing
Testing and adjusting track shoe tension
Bleeding air
Releasing remaining pressure in hydraulic circuit
Procedure for checking diode

TROUBLESHOOTING
Points to remember when troubleshooting
Sequence of events in troubleshooting
Points to remember when carrying out maintenance
Checks before troubleshooting
Connector types and mounting locations
Connection table for connector pin numbers
Explanation of control mechanism of electrical system
Display method and special functions of monitor panel
Method of using judgement table
Method of using troubleshooting charts
Details of troubleshooting and troubleshooting procedure
Troubleshooting of communication abnormality system (N mode)
Troubleshooting of engine controller system (E mode)
Troubleshooting of pump controller system (C mode)
Troubleshooting of engine throttle, pump controller [input signal system] (F mode)
Troubleshooting of hydraulic, mechanical system (H mode)
Troubleshooting of monitor panel system (M mode)

DISASSEMBLY AND ASSEMBLY
PRECAUTIONS WHEN CARRYING OUT OPERATION
SPECIAL TOOL LIST
SKETCHES OF SPECIAL TOOLS
AFTERCOOLER CORE
FAN GUARD, RADIATOR, HYDRAULIC
COOLER ASSEMBLY
FUEL COOLER AND AIR CONDITIONER
CONDENSER ASSEMBLY
FUEL TANK ASSEMBLY
ENGINE, PTO, HYDRAULIC PUMP
FINAL DRIVE ASSEMBLY
REVOLVING FRAME ASSEMBLY
SWING MACHINERY ASSEMBLY
SWING CIRCLE ASSEMBLY
TRACK SHOE ASSEMBLY
ONE LINK IN FIELD
IDLER ASSEMBLY
IDLER ADJUSTMENT CYLINDER
RECOIL SPRING ASSEMBLY
CARRIER ROLLER ASSEMBLY
TRACK ROLLER ASSEMBLY
HYDRAULIC TANK ASSEMBLY
MAIN PUMP INPUT SHAFT OIL SEAL
CONTROL, PTO LUBRICATION PUMP
MAIN RELIEF VALVE ASSEMBLY
CONTROL VALVE ASSEMBLY
SOLENOID VALVE ASSEMBLY
BOOM DAMPING VALVE ASSEMBLY
SWING MOTOR ASSEMBLY
CENTER SWIVEL JOINT ASSEMBLY
TRAVEL MOTOR ASSEMBLY
WORK EQUIPMENT PPC VALVE

OTHERS
Hydraulic circuit drawing
Electric circuit diagram

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