High-quality GX-AFTER belt auto-tensioner for JCB 444 DieselMax and EcoMax engines. It maintains correct belt tension for alternator, water pump and A/C drive, ensuring quiet operation and long accessory life.
| Brand | Models / Types |
|---|---|
| JCB | 2CX, 3CX, 4CX; Loadall: 520-50, 527-55, 535-95, 540 (among others); Telemaster JCB Generators with DieselMax/EcoMax engines |
| Wheel loaders / excavators | Units fitted with JCB 444 DieselMax / EcoMax (incl. selected JS variants; confirm by VIN) |
Unsure about fitment? Share your machine serial/engine type and we’ll confirm.
The auto-tensioner compensates belt stretch/load changes. Worn units cause belt squeal, vibrations, irregular belt wear and risk of overheating due to slip at the water pump.
GX-AFTER combines proven quality with OEM-level fit. Precision build and robust materials deliver long service life and hassle-free installation.
Yes — common cross-refs for JCB 444 DieselMax/EcoMax engines. Always confirm by VIN/engine label.
When should I replace the tensioner?Belt squeal, vibration, heat marks, pulley play and unstable tensioner pointer indicate replacement.
Does it fit A/C variants?Yes; the tensioner is common, but belt length/routing differs with A/C. Select the correct belt.
Approximate pulley dimensions?Pulley Ø ~70 mm, belt width ~31 mm (typical for 320/08651-/08657-/08759 family).
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Stable Tension
Less slip, quieter accessory drive
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Exact Fit
DieselMax / EcoMax compatible
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Hassle-free Install
GX-AFTER quality, OEM-level fit
Need help with compatibility? Contact us — we’ll match the part and advise on fitting.
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