Excavator Hydraulic Pump 708-1L-00413 708-1L-00431 708-1L-01411 Komatsu PC120-6 PC110-6 PC130-6 PC100-6 Main Piston Pump
Product Overview
High-performance main piston hydraulic pump designed for Komatsu excavator models PC120-6, PC110-6, PC130-6, and PC100-6. Compatible with part numbers 708-1L-00413, 708-1L-00431, and 708-1L-01411.
Common Faults & Solutions
- Weak digging power when hot: Internal leakage caused by worn pistons, cylinder block, and valve plate.
- Engine lugging: Stuck PC valve or malfunction of EPC solenoid valve.
- Slow actions & high oil temperature: Stuck LS valve or worn pump internals.
- Abnormal noise & vibration: Cavitation, damaged bearing, or piston shoe issues.
- Large case drain flow: Serious internal wear of pump assembly.
- Unstable operation: Abnormal EPC signal or intermittent LS valve sticking.
- Pump fault code & low power: Failed EPC solenoid or damaged wiring harness.