A-HF7331-AI Filter, Hydraulic, Cartridge (QTY 1)One New Aftermarket Replacement Hydraulic Filter Cartridge Replaces Fleetguard HF7331 This hydraulic filter cartridge is a pressure line replacement for the Fleetguard HF7331. It keeps hydraulic oil clean by trapping contaminants from normal wear and from new air, fluid, or components introduced into the system, helping protect precision hydraulic circuits and reduce unplanned downtime. The filter uses pleated microglass media and Buna seals for