The freewheel pulley provides a mechanical link between the alternator and  engine output crankshaft pulley, isolating the rotor from the auxiliary belt. This allows alternators to "free‐wheel” when the belt suddenly slows down. The part is subject to high stress, rotating up to 12,000 rotations per minute and as such, Valeo recommends changing a freewheel pulley every 50,000 miles.

 

The Valeo range features 107 fast moving part numbers, all supplied in anti-corrosion bags. Products come with protective caps and detailed fitting instructions. A new catalogue has also been produced, which provides comprehensive details on fitting and testing a freewheel pulley, buyers guide and cross-referencing. There is also a specific tool kit for replacing freewheel pulleys.