Update your semi with optimal hydraulic fluid performance, with the Donaldson Hydraulic Filter Assembly that ensures you're Ready for the Road Ahead™. Thanks to its durable body, this replacement filter assembly is able to neatly house the hydraulic filter while it collects contaminants. Fashioned with a durable body to protect the internal hydraulic filter and tolerate extreme pressures. FleetPride is your First Click in Heavy Duty®.