My Bissell powerforce bagged vacuum was burning the belts every few months, turns out the brush roller wasn't spinning freely. It spun but with a lot of friction and caused the belts to wear out/burn out.
Instead of replacing the brush roller, you can punch out the plastic cap and clean the metal bushings. Lubricate while you're in there with some wd-40 or similar.
Hardest part was punching it out, i used a hammer and screwdriver and after a few hits it started getting loose and eventually came off. Focus only on hitting the metal end whole holding the plastic cover.
Hope this helps let me know if you need help.
