I would not think just fitting a new belt would cause the problem if it was working fine before hand.
Hi
NormIn my experience, not necessarily.

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