4426160 Original Excavator Catheter Duct for Hitachi ZX110 ZX200 ZX330 ZX450 ZX600 ZX800 

Part number 4426160 is a specialized part number for Hitachi's original excavator guide pipe. This conduit is a critical connection or protective component in the hydraulic, fuel, gas, or electrical systems of excavators, used for transporting fluids, gases, or protecting wiring harnesses. According to the general information of Hitachi excavator accessories, it may be widely compatible with Hitachi ZX series (ZAXIS) hydraulic excavators. Common models may include ZX200, ZX210, ZX240, ZX250, ZX330, ZX350, ZX450, etc. Specific application areas may involve pilot hydraulic systems, fuel supply pipelines, pneumatic control pipelines, or main harness protection sleeves. The original part number is 4426160, which must be used as the reference for verification during procurement.

This conduit is a key component for fluid transmission or line protection in excavators. Its core function is to provide a sealed, pressure resistant, and wear-resistant protective channel for hydraulic oil, diesel, compressed air, or electrical wiring harnesses, ensuring the purity of the system medium, stable transmission, and preventing damage to internal components from external environments such as dust, moisture, and mechanical impact. The design working pressure of the conduit varies according to the system. The hydraulic conduit is 4-10MPa (pilot system) or higher, with excellent oil resistance, high and low temperature resistance (-40 ℃ to+120 ℃), pulse fatigue resistance and aging resistance. Protective conduits focus on flexibility, compression resistance, and flame retardancy to ensure long-term reliability under excavator vibration and complex working conditions.

The maintenance core of this catheter lies in regular inspection, prevention of leakage/damage, and standardized replacement. Every 250 working hours or every week, the system should check whether the conduit fixing clamps or ties are loose, whether the pipeline direction is smooth and without distortion, and whether there is any interference or friction with moving parts or high-temperature parts. For hydraulic/fuel conduits, it is necessary to check whether the outer layer has expanded, softened, or hardened. Replacement specification: It is necessary to use conduits with specified part numbers, ensure that the pipeline direction is reasonable during installation, reserve appropriate length to adapt to equipment movement, avoid sharp bends, and connect joints according to the specified torque or method.