Correct tension, pulley alignment and replacement intervals for poly-V belts on diesel CV alternator and AC drives.
What you will gain from this guide
- Over-tensioned belts destroy alternator bearings
- Misaligned pulleys cause edge wear in weeks
- Replace belts showing glazing or cracking
JK Fenner poly-V belts drive alternators and AC compressors on many Indian CV platforms. Incorrect tension is the leading cause of premature belt and accessory failure.
Tension check
- Use manufacturer deflection or tension gauge values
- Inspect idler and tensioner bearings while belt is off
- Compare belt section and rib count to the old label
When to replace
- Replace at visible cracking or missing ribs
- Change belt when alternator bearing noise appears
- Keep spare belts on shelf for route-critical vehicles
Need help with a part number or a fleet quote? Search the catalogue or get in touch — we deliver across India with GST invoices.
