Hi, i found the same with ours when i came to replace the belt that had snapped. Have just fitted a complete 'drum shaft kit', bought off e bay and now runs quietly, with the drum sitting up square at the front. I think the main components that helped were the new nylon bearings on the rim of the front panel. But because it came as a complete kit, i changed the back bearing, felt seals etc. as well. Probably why the belt snapped. All up, took about 1 1/2 hrs from start to finish. Good luck!
Ben, November 2009