The Idler Arm Assembly is an OEM replacement part for Frigidaire clothes dryers. It is a pulley assembly that helps to guide the dryer belt and keep it aligned. The idler arm assembly is typically located on the front of the dryer, near the dryer drum. Causes for replacement include worn bushings or broken linkage from constant mechanical movement over several years. Symptoms of a faulty idler arm assembly are: Dryer drum failure to rotate or revolve during the cycle Unusual vibrations, clunks, or knocks from within the dryer door during operation Slipping or shredding belts from lack of pulley engagement This OEM replacement is also compatible with Electrolux, Gibson, Kelvinator, and some Kenmore models.Part Number 134793511 (AP6996178) replaces 134793500, 7134793500.