5J5020 - SEAL ASSEM. 4J3419 5J-4973 6J9354 Fits Caterpillar !!!FREE SHIPPING!One New Aftermarket Replacement Piston Seal Assembly for Caterpillar (Cat) Construction Equipment This two piece piston seal assembly (5J5020 5J 5020) fits inside hydraulic cylinders including ripper lift cylinders and prevents oil transfer between the rod end and cap end of the cylinder. Manufactured to Cat style piston seal specifications, it maintains hydraulic pressure integrity across a wide range of Caterpillar construction, earthmoving, and
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