Caterpillar CT-9X7269 Seal Assembly

Cat 9X-7269 Seal Assembly is a genuine Caterpillar piston-seal assembly for hydraulic cylinders with a 4.5-inch bore. This two-piece, step-cut seal sits between the piston and cylinder to form a hydraulic seal and maintain pressure integrity under operation. Catalog data and aftermarket references describe it as a 4.500 in bore component with interface dimensions around 3.84 in for the piston side and 0.25 in cross-section, and note nylon/nitrile variants in some listings. The 9X-7269 seal is designed to replace worn or damaged seals in Cat hydraulic cylinders, restoring sealing performance and reducing fluid loss in demanding applications. Common uses include Cat hydraulic cylinders in construction and mining equipment, where reliable piston sealing supports actuator responsiveness and overall system efficiency.