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 | Track Adjuster Spring Group |
|---|---|
| Machine | Caterpillar 312B L |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Spring Group |
|---|---|
| Machine | Caterpillar 312 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Spring Group |
|---|---|
| Machine | Caterpillar 313 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Spring Group |
|---|---|
| Machine | Caterpillar 311C |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Spring Group |
|---|---|
| Machine | Caterpillar 312B |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Spring Group |
|---|---|
| Machine | Caterpillar 312C |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi ZX130LCN-6 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi ZX130LCN-5 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi ZX130LCN-3 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi ZX110 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi ZX130LCN |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi ZX130-3 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi ZX135US |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi ZX135US-3 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi ZX135US-5 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi ZX130 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi ZX135US-6 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi EX100-5 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi EX110-5 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi EX120-1 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi ZX120-3 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi EX120-2 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi ZX110-3 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi EX120-3 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi EX120-5 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi ZX125US |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Hitachi EX130 H-5 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Takeuchi TB2150R |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Takeuchi TB2150 |
| Manufacturer | Astrak |
| Part Type | Track Adjuster Assy |
|---|---|
| Machine | Takeuchi TB1140 |
| Manufacturer | Astrak |
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