how to fix my zanussi dryer?

I have a zanussi condenser dryer Model TC7114W. When it is switched on there is a constant bumping noise every time the drum rotates. What is the problem and how do i fix it?
mr g wakefield, September 2010


done
could be a belt issue or a belt tensioner issue.lid off and right side panel off (looking from the front) to see the parts

ck, September 2010
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