73.15mm Internal Diameter Ring

Cat back-up rings are thin rings that are designed to prevent extrusion of o-rings, lip seals, and reciprocating shaft seals under pressure. Attributes: • Helps maintain pressure seal• Outside diameter: 79.19 mm (3.12 in)• Back-up ringApplications:Used to service vane pumps in hydraulic systems of heavy-duty equipment. Consult your owner's manual or contact your local Cat Dealer for more information.