The Whirlpool WP31001710 Dryer Idler Arm is a critical component that ensures your clothes dryer runs smoothly. It's a metal arm with a pulley wheel attached that plays an important role in the drum rotation process, as the belt transfers this rotation to the idler arm's pulley. In turn, this keeps the belt taut and enables the dryer drum to be rotated efficiently. A worn or malfunctioning idler arm can cause a number of issues, including a slipping belt, grinding noises, prolonged drying periods, and even drum stoppage. Replacing a damaged sprocket arm is a simple adjustment that will restore WP31001710 to your dryer's function. while preventing additional wear and tear on other components. With an idler arm that functions properly,