High-performance main piston pump designed for Komatsu PC130-7, PC120-7, and PC110-7 excavators. Compatible with part numbers 708-1L-00650, 708-1L-00651, and 708-1L-01650.
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
Large case drain flow: Serious internal wear of pump assembly
Unstable operation: Abnormal EPC signal or intermittent LS valve sticking
Fault code E18/E27: Failed EPC solenoid or damaged wiring harness