This video from Sears PartsDirect shows how to replace a broken idler pulley in some Maytag electric dryers. If your dryer squeals or squeaks when the dryer is running, you might need to replace the idler pulley.
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The video includes these parts. Look up your model to make sure you get the right parts for your dryer.
Idler pulley
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Transcript:
The spring-loaded idler pulley exerts pressure and keeps the drive belt tight so it grips the dryer drum and rotates the drum during the drying cycle. When the idler pulley is worn or damaged, it squeals or squeaks when the dryer is running. If the idler pulley makes noise when the dryer is running, follow the step-by-step instructions in this dryer repair guide to replace it with a manufacturer-approved replacement part. Before you begin, wear work gloves to protect your hands. Unplug the dryer. Pull the lint screen out of the housing in the top panel of the dryer. Use a Phillips screwdriver to remove the 2 screws that secure the lint screen housing to the top panel. Push a putty knife under the lid near the left and right edges of the front of the dryer. Lift the top and prop it securely against the wall behind the dryer. Use a slot screwdriver to release the locking tab on the wire harness plug for the door switch. Use a nut driver to remove the front panel mounting screws from the inside of the cabinet. Pull the front panel forward slightly, and then lift and unhook it from the 2 bottom hangers. Pull the front panel off of the dryer and set it aside. Take a digital picture of the configuration of the drive belt on the idler pulley and the motor pulley so you can install it correctly. Push the idler pulley to the right to release tension on the drive belt. Release the drive belt from the drive motor pulley and pull it out of the idler pulley. Pull the idler pulley out of the bracket in the base of the dryer. Install the idler pulley on the bracket at the base of the dryer and thread the drive belt through the new idler pulley. Push the idler pulley to the right and loop the drive belt over the motor pulley. Position the front panel on the hangers at the bottom of the cabinet. Line up the mounting screw holes and reinstall the screws in the top of the front panel to secure it to the dryer cabinet. Plug the wire harness back into the plug on the door switch. Lower the top panel and snap it into place. Reinstall the screws in the lint duct housing and reinstall the lint screen. Plug the dryer into the wall outlet.