The Dayco Serpentine Automatic Belt Tensioner is a high-quality replacement part designed specifically for Freightliner trucks. This tensioner is designed to ensure that the serpentine belt remains properly tensioned, which helps to prevent belt slip, belt squeal, and premature wear on both the belt and the accessory pulleys. It is constructed from high-quality materials, including a durable steel bracket and a precision-engineered pulley assembly. The pulley itself is made from a high-strength polymer that is designed to resist wear and deformation, even under the most demanding conditions. FleetPride is your First Click in Heavy Duty®.