Komatsu PC490LC-11 Hydraulic Excavator Service Repair Manual
This is the service repair manual for the Komatsu PC490-11 and
PC490LC-11 Hydraulic Excavator (document number UENBM00304), covering
serial numbers 85006 and up for the PC490-11 and K70001 and up for the
PC490LC-11. It takes you through the full life of a repair — from
understanding how a system works, to testing it, diagnosing a fault, and
disassembling and rebuilding it to factory standard.
File Details
- File Format: PDF
- File Size: ~146 MB
- Pages: 2898
- Document Number: UENBM00304
What’s Inside This Komatsu PC490LC-11 Repair Manual
00 Index and Foreword / 01 Specifications
- Index and abbreviation list
- Foreword covering safety and basic information
- Complete technical specifications for the machine
10 Structure and Function / 20 Standard Value Table
- Urea SCR system, boot-up system
- Engine, cooling, and control systems
- Hydraulic system, work equipment system
- Swing system, travel system
- Undercarriage and frame, work equipment, cab and its attachments
- Standard value tables for the engine, machine, and electrical system
30 Testing and Adjusting / 40 Troubleshooting
- Testing and adjusting for the engine and cooling system, power train, undercarriage and frame, hydraulic system, cab and its attachments, and electrical system, including PM Clinic
- Troubleshooting by individual failure code
- Troubleshooting by system: electrical (E-Mode), hydraulic and mechanical (H-Mode), engine (S-Mode)
50 Disassembly and Assembly / 60 Maintenance Standard
- Step-by-step disassembly and assembly for the engine and cooling system, power train, undercarriage and frame, hydraulic system, work equipment, cab and its attachments, and electrical system
- Maintenance standard specifications for the engine and cooling system, power train, undercarriage and frame, hydraulic system, and work equipment
80 Appendix / 90 Circuit Diagrams
- Dedicated air conditioner system section: component parts, circuit diagrams, connector pin arrangements, self-diagnosis testing, sensor and pressure switch tests, relay tests, troubleshooting charts, and individual A/C failure codes (879AKA–879GKX)
- Complete hydraulic circuit diagram
- Complete electrical circuit diagram
For general background on this model, you can also check
Komatsu’s official equipment site.
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