Thomas G Aliquippa , PA August 02, 2015 Appliance: Whirlpool Electric Dryer WED6200SW0 Whirlpool Dryer Wed6200sw0: The idler pulley was going bad. How to replace Dryer Idler Pulley Assembly. Replaces idler arm belt and drum rollers Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes