3075264 Original Excavator M TRACK-LINK for Hitachi ZX800

The original track link (track link) part number 3075264 is a key connecting component of the Hitachi ZX800 series large excavator chassis walking system. It is mainly suitable for models such as ZX800, ZX800-3, ZX800-5, etc., and is used to connect track shoes and transmit driving force. The 'M' in the part number may represent a specific improved model or material version. This universal number is its only original factory identification. When ordering, the complete model, serial number, and chassis identification code of the excavator must be provided to ensure precise engagement and size matching with the drive wheel and guide wheel.

This product belongs to high-strength alloy steel forged chain links, usually using induction hardening process, with high surface hardness (up to HB 350-400), strong wear resistance and impact resistance. Its structural design ensures a stable connection with the track shoes (such as specifications with a width of 650mm and a pitch of 260mm), and is equipped with grease channels to extend the service life of the pin shaft and liner. As an "M" type chain link, specific enhancements may have been made in terms of sealing performance, weight optimization, or torsional strength to meet the high-intensity operational requirements of ZX800 in heavy load conditions such as mining and earthworks.

Daily inspection: Check the fastening status of the bolts connecting the chain links and track shoes every 8-10 hours of work (recommended torque 280-320 N · m), and clean the embedded gravel and soil. Regular inspection: Measure the fit clearance between the chain link pin shaft and the bushing every 500 working hours (standard value ≤ 3 mm). If it exceeds 5 mm, replace the bushing or chain link; At the same time, check the meshing wear between the chain link tread and the driving gear teeth. Lubrication and maintenance: Lubricate the chain link pin shaft every 250 hours of operation through a grease injection nozzle. Timing of replacement: When there are cracks, severe deformation, or elliptical wear of the pin hole in the chain link, it is necessary to replace the same side chain link in pairs. In harsh working conditions, it is recommended to conduct preventive inspections every 3000-4000 working hours.