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: