remove the bottom plate to expose the brush & belt remove the brush out along with the end caps, now try to turn the caps on the brush spindle (probably stiff/solid) so pull off the cap clean off all the debris from around the shaft refit the cap, repeat this procedure on the opposite end this should a 100 % improvement on the brush now turning FREELY, refit the brush bar and the belt to machine
post a reply if this helps fix
wirecutterman
January 2011