Lea S Felton , DE August 10, 2015 Appliance: Whirlpool Electric Dryer WED6600VW0 Whirlpool Dryer Wed6600vw0: The drum stopped spinning. How to replace Dryer Idler Pulley Assembly. My older son and I watched a video on the website and took the dryer apart. The video is extremely helpful. We found that it was the idler pulley and also needed a new belt. It took four days to get the parts and we replaced the pulley and reinstalled the belt put everything back together and I've been drying clothes ever since. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes