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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.
The Ken Merrick mod detail…
The Ken Merrick mod details can be found here:-
http://www.nortonownersclub.org/noc-chat/technical4-commando-forum/572586663?b_start=0#28312621
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