Caterpillar 5J0964 U-Cup Rod Seal is an OEM replacement seal for CAT hydraulic cylinders, sized 2.5 in ID x 3.0 in OD x 3/8 in cross‑section. It functions as a U‑cup rod seal that seals around the piston rod to prevent hydraulic fluid leakage while restricting contaminants from entering the cylinder bore. Listed on the Cat Parts Store as a U‑Cup Rod Seal, 5J0964 is designed for Caterpillar cylinder assemblies requiring a 2.5 in rod seal, providing reliable sealing performance in hydraulic applications.
