Komatsu PC78US-11 Hydraulic Excavator Shop Manual SEN06844-C8

Description

• Model List:
  • PC78US-11 Hydraulic Excavator

• 1. Index and Foreword
• 1.1. Index
• 1.2. Foreword, Safety, Basic Information
• 2. Specification
• 2.1. Table of Contents
• 2.2. Specifications
• 3. Structure and Function
• 3.1. Table of Contents
• 3.2. Bootup System
• 3.3. Engine System
• 3.4. Cooling System
• 3.5. Control System
• 3.6. Hydraulic System
• 3.7. Work Equipment System
• 3.8. Swing System
• 3.9. Travel System
• 3.10. Undercarriage and Frame
• 3.11. Work Equipment
• 3.12. CAB Related Parts
• 4. Standard Value Table
• 4.1. Table of Contents
• 4.2. Standard Value Table for Engine
• 4.3. Standard Value Table for Machine
• 5. Testing and Adjusting
• 5.1. Table of Contents
• 5.2. Precautions Before Work
• 5.3. Related Information on Testing and Adjusting
• 5.4. Engine and Cooling System
• 5.5. Power Train
• 5.6. Undercarriage and Frame
• 5.7. Hydraulic System
• 5.8. CAB Related Parts
• 5.9. Electrical System
• 5.10. Pm Clinic
• 6. Troubleshooting
• 6.1. Table of Contents
• 6.2. Precautions Before Work
• 6.3. Related Information to Troubleshooting
• 6.4. Troubleshooting by Failure Code (Display of Code)
• 6.5. Troubleshooting of Electrical System (EMode)
• 6.6. Troubleshooting for Hydraulic and Mechanical Systems (H Mode)
• 6.7. Troubleshooting of Engine (SMode)
• 7. Disassembly and Assembly
• 7.1. Table of Contents
• 7.2. Precautions Before Work
• 7.3. Related Information on Disassembly and Assembly
• 7.4. Prepare
• 7.5. Engine and Cooling System
• 7.6. Power Train
• 7.7. Undercarriage and Frame
• 7.8. Hydraulic System
• 7.9. Work Equipment
• 7.10. CAB Related Parts
• 7.11. Electrical System
• 8. Maintenance Standard
• 8.1. Table of Contents
• 8.2. Engine and Cooling System
• 8.3. Power Train
• 8.4. Undercarriage and Frame
• 8.5. Hydraulic System
• 8.6. Work Equipment
• 9. Appendix
• 9.1. Table of Contents
• 9.2. Precautions Before Work
• 9.3. Air Conditioner System
• 9.4. Component Parts of Air Conditioner System
• 9.5. Explanation of Procedure for Test of and Troubleshooting of Air Conditioner
• 9.6. Circuit Diagram and Configuration of Connector Pins of Air Conditioner
• 9.7. System Diagram of Air Conditioner
• 9.8. Locations of Air Conditioner Parts and Layout of Connectors
• 9.9. Examine Air Leakage (Duct)
• 9.10. Examine Air Conditioner with SelfDiagnosis Function
• 9.11. Open the Electrical System Abnormality Record Screen in Service Mode of Machine Monitor
• 9.12. Examine Vent (Mode) Changeover
• 9.13. Examine Fresh/Recirc Air Changeover
• 9.14. Examine Sunlight Sensor
• 9.15. Examine Refrigerant (Dual) Pressure Switch
• 9.16. Examine Relay
• 9.17. Air Conditioner Troubleshooting Chart 1
• 9.18. Air Conditioner Troubleshooting Chart 2
• 9.19. Information Shown in Troubleshooting Table
• 9.20. Failure Code 879AKA
• 9.21. Failure Code 879AKB
• 9.22. Failure Code 879BKA
• 9.23. Failure Code 879BKB
• 9.24. Failure Code 879CKA
• 9.25. Failure Code 879CKB
• 9.26. Failure Code 879DKZ
• 9.27. Failure Code 879EMC
• 9.28. Failure Code 879FMC
• 9.29. Failure Code 879GKX
• 9.30. Troubleshooting for Power Supply System (Air Conditioner Does Not Operate)
• 9.31. Troubleshooting for Compressor and Refrigerant System (Air is Not Cooled)
• 9.32. Troubleshooting for Blower Motor System (No Air Comes Out or Air Flow is Abnormal)
• 9.33. Troubleshooting for Fresh/Recirc Air Changeover
• 9.34. Troubleshooting by Gauge Pressure
• 9.35. Connect Service Tool
• 9.36. Precautions for Disconnection and Connection of Air Conditioner Piping
• 9.37. Handle Compressor Oil
• 10. Circuit Diagrams
• 10.1. Table of Contents
• 10.2. How to Read the Codes for Electric Cable
• 10.3. Hydraulic Circuit Diagram
• 10.4. Electrical Circuit Diagram
• 11. Index