7810106218 Original Loader Gearbox Ball Bearing for ZW550

Part number 7810106218 is a special part number for the ball bearings of the gearbox of Hitachi's original loader. This bearing is a key supporting component inside the loader gearbox or drive axle gearbox, used to support the gear shaft, ensure smooth transmission, and withstand radial loads. According to the accessory supplier information, the part number KC7810106218 is clearly applicable to the Hitachi ZW550 wheel loader. Considering the universality of the transmission system of Hitachi ZW series loaders, this bearing may also be suitable for large ZW series models such as ZW370-G and ZW550-G. The original part number is 7810106218, which must be used as the reference for verification during procurement.

This ball bearing is the core precision component of the loader gearbox transmission system. Its core function is to support the high-speed rotating gear shaft, significantly reduce transmission resistance through rolling friction, withstand the radial force and certain axial force generated by gear meshing, and ensure smooth, efficient, and low-noise power transmission. As an original component, it is made of precision forged high carbon chromium bearing steel, which has undergone quenching and low-temperature tempering treatment, possessing extremely high hardness, contact fatigue strength, and wear resistance. Its structure is a deep groove ball bearing or angular contact ball bearing, consisting of precision ground raceways, high-precision steel balls, and retainers inside.

The maintenance core of the gearbox bearings lies in ensuring lubrication, monitoring status, and standardized disassembly and assembly. The bearings rely on the gear oil inside the gearbox for splash lubrication, so it is necessary to strictly follow the maintenance manual, use the specified model and grade of gear oil, and replace the gear oil and filter every 1000 working hours or every year. Status monitoring: Every 500 working hours, a vibration analyzer can be used to detect the vibration spectrum of the bearing, early detection of defects such as peeling and pitting. Disassembly and assembly specifications: During maintenance, a dedicated puller or induction heater must be used for disassembly and assembly. It is strictly prohibited to directly strike the inner and outer rings of the bearing.