CAT Compact Excavator Overhaul Replacement Main Piston Pump 333-3788 OM-CAT333-3788 Hydraulic Overhaul Part

OM-CAT333-3788 fully duplicates OEM 333-3788 flow channel, special flange, spline shaft and load valve specs. Precision ground piston set + imported high-pressure FKM oil seals maintain ultra-low internal leakage without seepage under heavy loads.