Komatsu PC450-6, PC450LC-6 Hydraulic Excavator Shop Manual UEBM000100

Description

• Model List:
  • PC450-6 Hydraulic Excavator
  • PC450LC-6 Hydraulic Excavator

• 1. General
• 1.1. Specification drawings
• 1.2. Specifications
• 1.3. Weight table
• 1.4. Fuel, coolant and lubricants
• 2. Structure and Function
• 2.1. Parts related to engine
• 2.2. Radiator, oil cooler
• 2.3. Power train
• 2.4. Final drive
• 2.5. Swing circle
• 2.6. Swing machinery
• 2.7. Track frame, recoil spring
• 2.8. Track shoe
• 2.9. Hydraulic piping drawing
• 2.10. Hydraulic circuit diagram
• 2.11. Hydraulic tank, hydraulic filter
• 2.12. Hydraulic pump
• 2.13. Control valve
• 2.14. Selfreducing pressure valve
• 2.15. Suction safety valve
• 2.16. CLSS
• 2.17. Swing motor
• 2.18. Center swivel joint
• 2.19. Travel motor
• 2.20. Valve control
• 2.21. Work equipment swing PPC valve
• 2.22. Travel PPC valve
• 2.23. Service PPC valve
• 2.24. PPC safety lock valve
• 2.25. PPC accumulator
• 2.26. PPC shuttle valve, travel junction valve
• 2.27. LSEPC valve
• 2.28. Solenoid valve
• 2.29. Boom safety valve
• 2.30. Overload warning device
• 2.31. Work equipment
• 2.32. Air conditioner
• 2.33. Actual electric wiring diagram
• 2.34. Electric circuit diagram
• 2.35. Engine control
• 2.36. Electronic control system
• 2.37. Machine monitor system
• 2.38. Breaker mode hydraulic performance
• 3. Testing and Adjusting
• 3.1. Standard value table
• 3.1.1. Standard value table for engine related parts
• 3.1.2. Standard value table for chassis related parts
• 3.1.3. Standard value table for electrical parts
• 3.2. Testing and adjusting
• 3.2.1. Tools for testing, adjusting, and troubleshooting
• 3.2.2. Measuring engine speed
• 3.2.3. Measuring exhaust color
• 3.2.4. Adjusting valve clearance
• 3.2.5. Measuring compression pressure
• 3.2.6. Measuring blowby pressure
• 3.2.7. Testing and adjusting fuel injection timing
• 3.2.8. Measuring engine oil pressure
• 3.2.9. Testing and adjusting fan belt tension
• 3.2.10. Testing and adjusting belt tension for air conditioner compressor
• 3.2.11. Adjusting engine speed sensor
• 3.2.12. Measuring air supply pressure (boost pressure)
• 3.2.13. Testing and adjusting governor motor lever stroke
• 3.2.14. Testing and adjusting hydraulic pressure in work equipment, swing, travel circuit
• 3.2.15. Testing and adjusting TVC valve output pressure (servo piston input pressure)
• 3.2.16. Testing and adjusting LS valve output pressure (servo piston input pressure) and LS differential pressure
• 3.2.17. Testing control circuit oil pressure (oil pressure when selfpressure is reduced)
• 3.2.18. Testing solenoid valve output pressure
• 3.2.19. Measuring PPC valve output pressure and testing PPC shuttle valve
• 3.2.20. Adjusting work equipment, swing PPC valve
• 3.2.21. Testing travel deviation
• 3.2.22. Testing locations causing hydraulic drift of work equipment
• 3.2.23. Measuring oil leakage
• 3.2.24. Releasing remaining pressure in hydraulic circuit
• 3.2.25. Testing clearance of swing circle bearing
• 3.2.26. Testing wear of sprocket
• 3.2.27. Testing and adjusting track shoe tension
• 3.2.28. Bleeding air
• 3.3. Troubleshooting
• 3.3.1. Points to remember when troubleshooting
• 3.3.2. Sequence of events in troubleshooting
• 3.3.3. Points to remember when carrying out maintenance
• 3.3.4. Checks before troubleshooting
• 3.3.5. Connector types and mounting locations
• 3.3.6. Connector arrangement diagram
• 3.3.7. Connection table for connector pin numbers
• 3.3.8. Explanation of control mechanism of electrical system
• 3.3.9. Display method of special functions of monitor panel
• 3.3.10. Method of using judgement table
• 3.3.11. Method of using troubleshooting charts
• 3.3.12. Details of troubleshooting and troubleshooting procedure
• 3.3.13. Service code table
• 3.3.14. Troubleshooting of communication abnormality system (N mode)
• 3.3.15. Troubleshooting of governor, pump controller (governor control system) (E mode)
• 3.3.16. Troubleshooting of engine system (S mode)
• 3.3.17. Troubleshooting of governor, pump controller (pump control system) (C mode)
• 3.3.18. Troubleshooting of governor, pump controller (input signal system) (F mode)
• 3.3.19. Troubleshooting of hydraulic, mechanical system (H mode)
• 3.3.20. Troubleshooting of machine monitor system (M mode)
• 4. Disassembly and Assembly
• 4.1. Method of using manual
• 4.2. Precautions when carrying out operation
• 4.3. Special tool list
• 5. Maintenance Standard
• 6. Others