The idler pulley wheel helps the belt to rotate the drum in your dryer. If your dryer will not start, will not tumble, or is noisy during operation, the idler pulley wheel may need to be replaced. This part is located beneath the drum of the dryer, so the drum will need to be removed before you can access the idler pulley wheel. It is also recommended to remove the blower housing and motor from the dryer itself, for easier access to the idler pulley wheel.