Bounthavy V Inman , SC January 31, 2016 Appliance: Whirlpool Electric Dryer WED8300SW0 Whirlpool Dryer Wed8300sw0: Broken belt and mtr pulley. How to replace Idler Pulley. Replaced belt and pulley. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes