Excavator Hydraulic Pump 708-3M-00020 708-3M-00011 708-3M-00031 Komatsu PC160-7 PC160-8 PC170-8 PC190-8 Main Piston Pump
Excavator hydraulic pump 708-3M-00020 708-3M-00011 708-3M-00031 Komatsu PC160-7 PC160-8 PC170-8 PC190-8 Main piston pump
Common Faults
- Weak digging power when hot: Internal leakage from 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.
- Large case drain flow: Serious internal wear of pump assembly.
- Unstable operation: Abnormal EPC signal or intermittent LS valve sticking.
- Pump fault code: Failed pressure sensor or damaged wiring harness.