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I would not think just fitting a new belt would cause the problem if it was working fine before hand.
Hi Norm
In my experience, not necessarily. blush
Fitting a new belt - and re-tensioning - may isolate a bearing ready to fail.
Over-tensioning of the belt may exacerbate the problem.

Many thanks to Buckets for the great illustrations.

Kahuna, please let us know what you find.

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Jack