Komatsu PC400-7 / РС400LC-7 excavator, repair e-manual (in Russian)

Contents

Preface

General provisions

• General assembly drawing
• Technical specifications
• Weight table
• List of lubricants and coolants

Design, purpose and maintenance standards

• Engine-related parts
• Radiator, oil cooler, aftercooler
• Power transmission
• Final drive
• Sprocket
• Platform Swing Gear
• Swing circle
• Track frame, tension spring
• Idler
• Carrier roller
• Track roller
• Track shoe
• Hydraulic equipment layout
• Hydraulic tank
• Hydraulic pump
• LS(PC) valve
• Variable volume valve
• Control valve
• Main relief valve
• Closed center load sensing system (CLSS)
• Self-relieving valve
• Swing motor
• Back pressure prevention valve
• Center swivel joint
• Travel motor
• Travel union valve
• Valve control system
• Travel PPC shuttle valve
• Work equipment
• Platform swing PPC valve
• Travel PPC valve
• Additional PPC valve
• Solenoid valve
• PPC accumulator
• Return oil filter
• Boom hydraulic drift prevention valve
• Arm hydraulic drift prevention valve
• Quick return valve
• Lift check valve
• Additional equipment circuit changeover valve
• Locking valve
• Hydraulic cylinder
• Working equipment
• Fire heater and related parts
• Engine management system
• Electronic control system
• Monitoring system (technical characteristics of multifunctional monitoring system)
• 7-segment monitoring system
• Sensor

Checking and adjusting

• Standard value table for engine
• Standard value table for chassis
• Checking and adjusting
• Troubleshooting
• List of tools for checking, adjusting and diagnosing faults
• Measuring engine speed
• Measuring pressure air intake
• Measuring exhaust gas temperature
• Measuring exhaust gas color
• Adjusting valve clearance
• Measuring compression pressure
• Measuring blowby pressure
• Measuring engine oil pressure
• Working with fuel system devices
• Relieving residual pressure in the fuel system
• Measuring fuel pressure
• Bleeding air from the fuel circuit
• Checking the fuel circuit for leaks
• Adjusting the engine speed sensor
• Checking and adjusting the fan belt and alternator belt tension
• Measuring the bearing clearance of the turntable
• Checking and adjusting the track chain tension
• Checking and adjusting the oil pressure in the hydraulic circuits of the working equipment, platform rotation and travel
• Measuring the main pressure in the control circuit
• Checking and adjusting the oil pressure in the control circuit of the PC pump
• Checking and adjusting the oil pressure in the control circuit of the LS pump
• Measuring the pressure at the outlet of the solenoid valve
• Measuring the pressure at the outlet of the PPC valve
• Adjusting the clearance in the PPC valves of the working equipment and platform rotation

Disassembly and assembly

• How to use this manual
• Precautions when performing work
• List special tools
• Removing and installing the cylinder head assembly
• Removing and installing the rear engine seal
• Removing and installing the front engine seal
• Removing and installing the booster pump
• Removing and installing the fuel injector assembly
• Removing and installing the injector tip
• Removing and installing the starter assembly
• Removing and installing the radiator assembly
• Removal and installation of hydraulic system oil cooler assembly
• Removal and installation of engine and hydraulic pump assembly
• Removal and installation of turntable assembly
• Removal and installation of platform swing hydraulic motor and platform swing gearbox assembly
• Disassembly and assembly of platform swing hydraulic motor and platform swing gearbox assembly
• Removal and installation of sprocket
• Removal and installation of travel hydraulic motor and final drive assembly
• Disassembly and assembly of final drive assembly
• Disassembly and assembly of support roller
• Disassembly and assembly of track roller
• Disassembly and assembly of guide wheel
• Disassembly and tension spring assembly
• Removal and installation of track chain assembly
• Removal and installation of operator's cabin assembly
• Removal and installation of pump controller
• Removal and installation of swing frame assembly
• Removal and installation of counterweight assembly
• Removal and installation of hydraulic tank assembly
• Removal and installation of hydraulic pump assembly
• Removal and installation of hydraulic pump input shaft seal
• Removal and installation of distribution valve assembly
• Disassembly and assembly of distribution valve assembly
• Removal and installation of central swivel joint assembly
• Disassembly and assembly of central swivel joint assembly
• Disassembly and assembly of the PPC valve of the working equipment
• Disassembly and assembly of the PPC valve of the travel control assembly
• Disassembly and assembly of the hydraulic cylinder assembly
• Removal and installation of the working equipment assembly
• Removal and installation of the operator's cabin glass (glued-in glass)
• Removal and installation of the front window Assembly

Supplement for excavator with boom offset

• Specification drawings
• Technical characteristics
• Weight table
• Checking and adjustment
• Troubleshooting
• Standards maintenance

Other

• Hydraulic circuit diagram
• Electrical circuit diagram (for extremely low temperatures)

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