Product Overview This hydraulic main piston pump is the original core power component for the E336E and E336F excavator hydraulic system. It supplies pressure oil for boom, arm, bucket, and travel movements. Manufactured with precise processing, it delivers stable output pressure and excellent wear resistance, making it an ideal choice for machine overhaul and replacement. 377-4950 377-4968 Common Faults Weak digging force and slow working speed Abnormal noise and vibration