The Whirlpool WP31001535 Motor Pulley transfers rotational motion from the dryer motor to the drive belt, helping turn the drum during drying cycles. This replacement component connects with the motor and provides the belt with the movement needed to rotate the drum and tumble clothes for even heat exposure. A properly functioning motor pulley supports smooth drum rotation and helps maintain the dryer's normal operation. If the pulley becomes worn, cracked, or damaged, it may cause unusual noises, belt problems, or difficulty turning the drum.