Hitachi excavator accessory 4437197 hydraulic pump assembly (plunger pump)

This product is the main hydraulic pump assembly (plunger pump) of an excavator, which belongs to the axial piston variable displacement pump. Adopting high-precision processing technology and high-quality materials manufacturing, it has stable flow output, high working pressure, and reliable load sensing control function, which can effectively guarantee the power requirements of excavator working devices (boom, boom, bucket) and rotation and walking systems. Integrated main pump and pilot pump structure, compact structure, easy installation. High precision plunger and distribution plate design effectively reduces internal leakage and improves volumetric efficiency. Equipped with a power regulator, the displacement can be automatically adjusted according to the load, which is energy-saving and efficient. Suitable for heavy-duty working conditions, ensuring the smoothness and stability of composite actions such as excavation, rotation, and lifting. High quality after-sales parts have performance close to the original factory standards, high cost-effectiveness, and can significantly reduce maintenance costs.