Disassembled the dryer, and removed all support rollers and tensioner pulley. Removed broken belt. Vacuumed out years of lent build up from the drive motor, and heater assembly. Polished support studs for drum support rollers and tensioner pulley. Installed the new drum support rollers, tensioner pulley, and new belt. Installed a new drum baffle after finding missing screws among the lent ). Reassembled the dryer -- working great, and running very quietly now.