Update your semi with optimal hydraulic fluid performance, with the Donaldson Duramax Spin-On Hydraulic Filter that ensures you're Ready for the Road Ahead. This replacement filter captures harmful contaminants in the hydraulic fluid, preventing pressure leaks and corrosion from occurring. Manufactured with a durable 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.