4436800 Original Excavator Hydraulic Pump High Pressure Oil Pipe for ZX200 

Part number 4436800 is the original high-pressure oil pipe used on the hydraulic pump assembly of the Hitachi ZX200 series medium-sized hydraulic excavator. This component is mainly suitable for models such as ZX200, ZX200-3G, ZX210, ZX240, ZX270-3, etc. The universal part number follows the numbering rule of 4436801. As a key pipeline connecting the main hydraulic pump and the main control valve, its length, bending angle, and specifications of the two end joints are fully matched with the precise layout of the hydraulic system, ensuring reliable connection of the high-pressure oil circuit.
 

This product is a Hitachi original hydraulic pump high-pressure oil pipe, which is the core pipeline in the excavator hydraulic system that bears the working main pressure and transports hydraulic oil. Its core function is to ensure that hydraulic oil is transmitted to various actuators (such as oil cylinders and motors) without leakage and efficiently under a system pressure of up to 34.3 MPa, directly affecting the equipment's operating speed, force, and stability.
 

Installation and inspection: The replacement of high-pressure oil pipes must be carried out after the hydraulic system is completely depressurized. Before installation, it is necessary to thoroughly clean the joints at both ends of the oil pipe and the pump and valve interfaces to prevent impurities from entering the system. New sealing rings or combination gaskets must be used, and the joint bolts must be tightened in diagonal order using a torque wrench according to the specified torque to avoid leakage or damage to the threads due to uneven force. After installation, start the engine, operate each action, and carefully check all connections for oil leakage.