4448401 Excavator Parts Hydraulic Filter for ZX135US-7

Hydraulic filter 4448401 is a genuine Hitachi component designed specifically for the ZX135US-7 (13.5 ton class) excavator. This universal number is the unique identifier of the original accessories, ensuring a complete match with the hydraulic system pipelines and installation interfaces of the host. When ordering or replacing, please be sure to verify this universal number to ensure its filtering performance, sealing reliability, and system compatibility, and avoid equipment failure caused by the use of non-standard parts.

This product is a cylindrical hydraulic return oil or pipeline filter, with a high-strength silver gray metal shell and precision holes distributed on the surface to balance internal pressure. Internally equipped with multi-layer composite filter materials (visible yellow filter layer), it can efficiently capture metal debris, dust, and oxidized gum in hydraulic oil, with a filtration accuracy of up to 10 microns, effectively protecting core components such as the main pump and valve group. Its structural design combines high flow capacity and low pressure loss characteristics, and uses oil resistant rubber sealing rings to ensure long-term leak free operation in high-pressure cycles.

It is recommended to check and replace every 500 hours of work or every 6 months. If working in a dusty and harsh environment, the cycle should be appropriately shortened. Before replacement, the filter seat interface should be cleaned, the sealing ring of the new filter should be checked for integrity, and installed with the specified torque to avoid deformation of the housing due to over tightening. Daily use of original designated hydraulic oil and keeping the oil tank clean. It is essential to use the original 4448401 filter, whose filtration efficiency and structural strength have been rigorously tested, which is a key guarantee for maintaining the cleanliness of the ZX135US-7 hydraulic system and extending the service life of the equipment.