Komatsu PC128UU-2 Excavator Repair Service Manual

Table of Contents

Komatsu PC128UU-2 Manual

Main sections and selected subjects identified in the source documentation:

• Manuals: Shop Manual
• 01 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01-1
• 10 STRUCTURE AND FUNCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
• 20 TESTING, ADJUSTING AND TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-1
• 30 DISASSEMBLY AND ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-1
• 90 OTHER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90-1
• GENERAL
• STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
• TESTING, ADJUSTING AND TROUBLESHOOTING
• DISASSEMBLY AND ASSEMBLY KOMATSU Excavator PC128UU-2
• When raising heavy components, use a hoist or crane. Check that the wire rope, chains and hooks are free from damage.
• Manual Extract – Troubleshooting
• | Display
• Code
• | Abnormal system
• | Nature of abnormality
• | 71
• | Boom RAISE stop solenoid EPC system
• | 1) Disconnection inside solenoid
• 2) Short circuit inside solenoid or short circuit with ground
• 3) Disconnection in wiring harness between C16(1), (2) – COI, or short circuit with ground
• | 72
• | Boom LOWER stop EPC solenoid system
• 3) Disconnection in wiring harness between C14(1), (2) – COI, or short circuit with groud
• | C1
• | Boom RAISE pressure switch and
• boom LOWER pressure switch input at
• same time for more than 3 seconds
• | Defective boom RAISE or boom LOWER pressure switch