9255876 Original Excavator Travel Motor for Hitachi ZX300-6

Part number 9255876 is the original walking motor provided by Hitachi for the ZX300-6 series (with a total working weight of approximately 30 tons) hydraulic excavator. This component is the core hydraulic drive unit that drives single-sided track walking. Its universal model usually covers models on the same platform as ZX300-6, and may also be applicable to models with similar tonnage and chassis design such as ZX330-6 and ZX350H-6. As the core driving component of the original factory, its installation flange size, output spline, hydraulic interface are completely matched with the lower frame and hydraulic main valve. It is strictly prohibited to use motors that are not from the original factory or do not match the model, in order to avoid weak walking, deviation or system damage.

This product is an integrated assembly of a slant disc axial piston hydraulic motor and a planetary gear reducer. The motor body is a black ductile iron housing with a casting texture on the surface, and the bottom is a brass mounting flange with a through-hole. All internal wear parts (such as plungers, port plates, bearings, seals) have been replaced with new parts, and their performance has been restored to the standard of new parts. Its typical technical parameters include: working pressure up to 35MPa, displacement of about 130-160 cc/rev, and output torque up to 15000-20000 N · m. The motor integrates functions such as parking brake, high-low speed switching valve, overload relief valve, etc.

Pre installation inspection: As a remanufactured part, it is still necessary to check whether all oil port plugs are intact and whether the shell has been damaged during transportation before installation. Installation points: 1 Cleaning: Before installation, it is necessary to thoroughly clean the installation surface of the lower frame and the hydraulic pipeline interface. 2. Alignment: Use a specialized lifting device to install smoothly, ensuring that the output shaft spline is aligned with the drive wheel set and avoiding rough tapping. 3. Tighten: Tighten the installation bolts according to the cross sequence and specified torque (usually 200-300 N · m) in the maintenance manual. 4. Connection: When connecting hydraulic pipelines, ensure that the O-ring is intact and the joint torque meets the standard.