The Husqvarna 505153901 Belt Tensioner Wheel Assembly helps maintain proper belt tension for smooth and consistent operation of compatible equipment. Designed as a replacement tensioner wheel assembly, it applies the necessary pressure to the belt and helps keep it properly positioned on the drive system during use. Maintaining proper belt tension can support effective power transmiss... https://www.wholetoolbox.com/husqvarna-505153901-belt-tensioner-wheel-assembly/505153901.html