Precision Engineering Specifications: Manufactured with CNC precision machining technology, this hydraulic oil pump achieves micro-tolerance gear cavity clearances for optimal volumetric efficiency. The dynamically balanced rotor assembly ensures smooth, pulsation-free hydraulic flow for 495A 504 diesel tractors produced in the Shanghai and Jiangsu manufacturing hub. Part Name Hydraulic pump Engine 495A 504 Part No 495 A 504 Weight 12KG Packing Size 42*29*18 Material Steel