This DIY dryer repair guide explains how to replace a dryer idler pulley. The spring-loaded idler pulley keeps the belt tight so the belt can grip and rotate the drum during the drying cycle. A worn or damaged idler pulley squeals or squeaks when the dryer is running. Because typical machine oils collect dust, lubricating the idler pulley only makes the problem worse. If the idler pulley makes noise when the dryer is running, replace it with the manufacturer-approved dryer part.
The video below shows an electric dryer, but the repair process is the same for gas. Follow these steps to replace the idler pulley in Kenmore, Whirlpool, Maytag, Amana, Roper, Crosley and Estate dryers with a lint screen housing located in the top dryer panel.