Track adjusters hold the track at working tension: the grease-charged cylinder and recoil spring assembly that pushes the idler forward, takes up slack and absorbs the shocks the track feeds back when it bites debris. PartsForMachines supplies track adjusters and adjuster components matched by machine make and model, with idlers, rollers, sprockets and the rest of the undercarriage in the same section.
The assembly does two jobs and fails two ways. The tension cylinder, charged with grease through the adjuster valve, sets track sag; leaking seals here mean the track keeps going slack no matter how often it's greased, the classic symptom. The recoil spring behind it cushions impact; a collapsed or broken spring lets the idler slam, throwing tracks and hammering the frame. Adjusters are sold as complete assemblies and as components, seal kits, cylinders, springs and yokes, with each product page listing the machine fitment and dimensions. Compare lines up options, and Ask Simon confirms fitment from the machine model and serial.
A safety note belongs in any adjuster description: the recoil spring is under enormous preload, and adjuster disassembly is a workshop job with the proper fixtures, not a field strip. Relieving track tension safely through the grease valve is routine; opening the spring pack is not.
Track tension itself is the cheapest undercarriage maintenance there is, slack tracks derail, tight tracks wear everything, so the sag specification in the machine manual earns checking weekly. For fitment confirmation, send the machine details via WhatsApp 07754288583.
| Part Type | Yoke |
|---|---|
| Machine | JCB 8085 |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi EX60LC-5 |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi ZX75UR |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | JCB JZ70 |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi EX60-5 |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi ZX85USB-5 |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi ZX70LC |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi ZX70LC-3 |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi EX80-5 |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi ZX80SB |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Replaces | JCB 331/20045 |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi EX75US-7 |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi ZX85US |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi EX75UR-3 (Type 2) |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi ZX80SBLC |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi EX75UR-5 |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | JCB 8080 |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi ZX75US |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi EX80U |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi ZX85USB-3 |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi ZX70 |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi EX75UR-3 (Type 1) |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi EX75UR |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi EX60-2 |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi EX60-3 |
| Manufacturer | Astrak |
| Part Type | Yoke |
|---|---|
| Machine | Hitachi EX60LC-3 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Yoke |
|---|---|
| Machine | Hitachi ZX210-3 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Yoke |
|---|---|
| Machine | Hitachi ZX210 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Yoke |
|---|---|
| Machine | Hitachi ZX210LC |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Yoke |
|---|---|
| Machine | Hitachi ZX200LC-3 |
| Manufacturer | Astrak |
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