2055368 Original Loader Hub Gear Housing Axle for ZW250-5B

Part number 2055368 is a genuine wheel hub produced by Hitachi Construction Machinery in Japan. This wheel hub is a "support chain" assembly used for tracked equipment such as excavators, serving as the hub for guide wheels, support wheels, or drive wheels. Therefore, it is mainly suitable for Hitachi ZX series crawler excavators. If you need the ZW250-5B wheel reducer or hub components, please provide a clear requirement description based on the equipment body serial number (such as front/rear axle, left/right side), check the correct part number, and strictly prohibit mixing to avoid installation failure or walking system failure.

This product is a wheel hub forged/precision machined from high-strength alloy steel. The main body is in the shape of a gear or flange, with a steel gray surface that has been quenched and tempered or carburized. The tooth surface and bearing mounting holes have high hardness and wear resistance. The center has precision machined bearing holes or keyway holes for installing bearings or connecting drive shafts. The outer edge has bolt mounting holes for fixing wheels or sprockets. Its core function is to serve as a rotating support, bearing the weight and impact load of the equipment, and transmitting torque. As an original factory component, its dimensional tolerance, dynamic balance accuracy, and internal material quality are strictly guaranteed.

Installation specifications (if used for the correct model): 1 Cleaning and inspection: Before installation, the bearing holes, installation surfaces, and matching shafts and bearings of the wheel hub must be thoroughly cleaned with a cleaning agent to ensure that there are no burrs, rust, or old oil stains. Use an inner diameter dial gauge to check if the bearing hole size is within the tolerance range. 2. Heating installation: For wheel hubs with interference fit, it is usually necessary to use an oil bath or induction heater to evenly heat the hub to 80-120 ℃ (refer to the maintenance manual for specific temperature), and then quickly and accurately install it onto the shaft. 3. Torque tightening: After installation, a torque wrench must be used to tighten all connecting bolts in a staggered order and with the specified torque (usually in the range of 200-400 N · m). 4. Lubrication: Immediately add the specified type of lubricating grease or gear oil after installation.