Sprag clutch failure: oversize engine sprocket

Part Number:064681

I had a problem with sprag clutches failing, which was odd because I had fitted a new engine sprocket.

I contacted Andover Norton, who were excellent as usual, and then arranged to take the failed parts in.

They measured these whilst I waited and then told me that there was a batch of Engine Sprockets that were machined oversize, these sprockets caused the sparg clutches to fail.

Bear in mind 2 to 3 thou wear will do it anyway.

I had one of the items that was machined over size.

Replaced that and the sprag all now works fine.