4629372 Original Excavator Hydraulic Pump High Pressure Oil Pipe for ZX200-3

Part number 4629372 is the original hydraulic pump high-pressure oil pipe provided by Hitachi for the ZX200-3 hydraulic excavator. Specially designed for ZX200-3. Its universal model may cover the same platform models of ZX200-3, used to connect specific oil ports of the hydraulic main pump. As the designated high-pressure pipeline of the original factory, its unique bending shape and different joint structures at both ends are precisely matched with the layout of pumps and valves in the engine compartment. It is strictly prohibited to use non original or non matching oil pipes to avoid serious leakage, pressure loss or pump body damage.

This product is an S-shaped curved seamless steel pipe high-pressure oil pipe, with a silver gray body and a rust proof surface treatment. The key feature lies in the different joint designs at both ends: one end is a straight through joint with fine external threads, usually connected to the pressure output port of a hydraulic pump; The other end is a flared joint with a precision filter structure integrated internally. This filter is used for final filtration before high-pressure oil enters the next stage valve body, protecting precision hydraulic components. This integrated design of "pump pressure end+filter end" is a typical feature of original parts. Its working pressure can match the maximum pressure of the main pump (usually ≥ 30MPa), and it has excellent pressure resistance and anti pulse fatigue performance.

Installation specifications (safety first): 1 Pressure relief: The engine must be started before operation, and all actions must be turned off until no power is available. Then, manually shake the control lever back and forth to completely release the residual pressure in the system. 2. Cleaning: Before installation, clean the threads, sealing cone surfaces, and inside of the filter screen end of both ends of the joint with non-woven fabric to ensure that there are no impurities. 3. Alignment installation: Align the two end joints with the pump port and valve body interface by hand, smoothly screw in the first thread, and ensure that the threads are aligned. 4. Torque tightening: A torque wrench must be used to tighten the two ends of the joint according to the torque specified in the maintenance manual (usually 40-60 N · m). Pay special attention to protecting one end of the filter belt and strictly prohibit bumping the filter screen