Excavator Hydraulic Pump 708-2L-00150 708-2L-00055 708-2L-00052 Komatsu PC200-6 PC210-6 PC240-6 PC270-6 Small Nose Hydraulic Main Piston Pump Common Faults & Solutions Weak Operation When Hot, Acceptable Performance When Cold Wear of pistons and valve plate reduces volumetric efficiency and causes high-pressure internal leakage. Leakage increases when oil temperature rises. Hydraulic oil contamination is the primary trigger. Engine Lugging & Speed Drop Misadjustment or stuck