4345174 Original Excavator Grouser Shoe for Hitachi ZX890-5A

The original track shoes (part number 4345174) are specialized chassis components for Hitachi ZX870-7 large excavators, mainly suitable for 7th generation models of ZX870-7, ZX870H-7, ZX870LCH-7 and other series. This track shoe can also be used for early models such as ZX870-5A and ZX890H-5A (with 47 track shoes per side and 51 for the extended version). Its universal number 4345174 is its unique identifier in Hitachi's original accessory system, corresponding to a three rib track plate type with a pitch of 260 mm and a width of 650 mm. When ordering, the complete excavator model, serial number, and chassis identification code must be provided for verification to ensure size, hole position, and strength matching.

This product belongs to the steel three bar track plate, made of induction hardened rolled alloy steel, with a surface hardness of HB 350-400, and high wear resistance and impact resistance. There are two mud cleaning holes on the structure, which can effectively prevent soil accumulation and improve traction on soft ground Its connecting pin has undergone heat treatment and is equipped with a dust-proof seal. It is used in conjunction with a hydraulic (lubricating grease) track tensioning mechanism and a damping recoil spring, which can effectively buffer operational impacts and extend the service life of the chassis system. The grounding pressure of the track shoes is about 124 kPa, suitable for heavy load conditions such as mines and earthworks.

Daily inspection: Check the tightening status of the track plate bolts every 8-10 working hours (torque standard 280-320 N · m), and clean the gravel and soil in the gaps of the track plate. Regular maintenance: Check the wear of the track shoes every 500 working hours (with a maximum allowable wear thickness of 30% of the original thickness), and inspect the gap between the pin shaft and the liner (standard value ≤ 3 mm). Lubrication and maintenance: Lubricate the track links with lithium based grease every 250 working hours through the grease nozzle. Tension adjustment: Adjust the tension of the track according to the ground conditions (standard sag of 30-50 mm). Too tight will accelerate wear, while too loose may lead to derailment. Timing of replacement: When the height wear of the track shoe ribs exceeds 50% or cracks or deformations appear, it is necessary to replace the track shoes on the same side in pairs to maintain balance. It is recommended to check the overall condition of the track assembly every 3000-4000 working hours in harsh working conditions such as sand, gravel, and mining.