Prepare your semi to be Ready for the Road Ahead , with the Kit Masters Remanufactured HT/S Fan Clutch that offers proper engine cooling in a complete range of temperatures. To maintain a functional engine temperature, this replacement component controls the operation of the engine cooling fan by applying or removing power as needed. Built with an easy-to-install body that works to silently cool the engine. FleetPride is your First Click in Heavy Duty .