Excavator Hydraulic Pump 708-1L-00650 708-1L-00651 708-1L-01650 Komatsu PC130-7 PC120-7 PC110-7 Main Piston Pump 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