My dryer tumbler stop turning so i assumed it was the belt. I removed the tumbler ant found the belt intact with a burn mark were it had rested against the exhaust tube, i figured it stretched out and became lodged against the tube. I checked the motor drive to make sure it wasnt frozen up and found the pulley that moves the belt was loose. Does this mean I need toreplace the motor, it doesnt look as if the pulley can be tightened.