Description:Cat Idler pulleys are responsible for guiding and tensioning the engine drive belts. Engine belts are routed around the various engine accessories, such as the alternator, water pump, power steering pump, and AC compressor. Cat idler pulleys are manufactured to provide the quality you expect for your equipment.Attributes:Mounts using metric hardware. Applications: Cat idler pulley assemblies are used in the mounting assemblies for the refrigerant compressor and tensioner. Consult your owner's manual or contact your local Cat Dealer for more information.