Equip your semi truck to be Ready for the Road Ahead™, with the Muncie RLFG-501 Spin-On Hydraulic Oil Filter, a key piece that keeps hydraulic oil clean and functional. With a filter-based design, this replacement device works to capture contaminants in hydraulic oil before they cause damage to pressurized equipment. Fashioned with a visual indicator gauge for simple quality monitoring. FleetPride is your First Click in Heavy Duty®.