Coil spring for Hitachi EX300系列、EX400系列、EX870系列 excavator

Coil spring for Hitachi EX300系列、EX400系列、EX870系列 excavator
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Coil spring for Hitachi EX300系列、EX400系列、EX870系列 excavator - Machineryline
Coil spring for Hitachi EX300系列、EX400系列、EX870系列 excavator | Image 1 - Machineryline
Coil spring for Hitachi EX300系列、EX400系列、EX870系列 excavator | Image 2 - Machineryline
Coil spring for Hitachi EX300系列、EX400系列、EX870系列 excavator | Image 3 - Machineryline
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Brand: Hitachi
Type: coil spring
Spare part type: original spare part
Year of manufacture: 2026
Location: China 唐山市10907 km to "United States/Columbus"
Placed on: Sep 7, 2026 AD
Machineryline ID: UY52305
Condition
Condition: new

More details — Coil spring for Hitachi EX300系列、EX400系列、EX870系列 excavator

The track adjuster assembly (tension‑recoil assembly) is a heavy‑duty and ultra‑heavy‑duty core undercarriage spare part for Hitachi large‑size excavators. It is fully pre‑assembled, including grease‑fed tension cylinder, heavy‑load recoil buffer spring, piston rod, complete sealing kit, spring seat and grease nipple. This tensioner is designed as a direct‑fit aftermarket replacement for Hitachi EX300 series, EX400 series and EX870 series excavators.

Track tension is adjusted by injecting grease. The heavy‑duty recoil spring absorbs fierce impact and continuous vibration from earth‑moving, quarrying and mining operations. It stabilises the idler position and maintains consistent track tightness to protect the whole heavy‑duty travel undercarriage system.
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