Type: Posts; User: cutlass
Bearing in center hub, back of drum
Try www.bbclighting.com Phone #414-933-0808. Good Luck! Fax #414-933-4318 Milwaukee, Wis. 53233
If it Isn't the idler pulley, (which runs with the drum belt), It could be the rear drum bearing. This is located behind the drum. It requires pulling the drum forward to take a look, if not taking...
Polarity could be reversed? Common is being plugged into the hot side, vice/versa?