Prepare your semi to be Ready for the Road Ahead , with the Donaldson Spin-On Hydraulic Filter that contributes to optimal hydraulic fluid performance. Due to its ultra-fine filter, this replacement component is able to capture hydraulic contaminants before they cause corrosion or potential pressure leaks. Engineered with a sturdy body to extend the service life and reduce the frequency of filter changes in semis or tractors. FleetPride is your First Click in Heavy Duty .