Caterpillar 4S-7756 Rubber Seal is a lip-type hydraulic piston rod seal designed for CAT cylinders with a 25 mm bore and a 13 mm rod. The rubber seal features an outer diameter of 25.48 mm, a precise fit for standard rod glands, and seals along the piston rod to prevent hydraulic fluid leaks and maintain pressure in the cylinder. Identified by part numbers 4S-7756 (also sold as 4S7756), this CAT OEM replacement is used in small-bore cylinders across Caterpillar equipment. Typical applications include hydraulic cylinders in construction and industrial machinery where a 25 mm bore and 13 mm rod are specified, ensuring compatible fitment and reliable sealing performance.
