Goodrich Wheel & Brake Seal Retainer 56-873 OEM Replacement

The Goodrich Wheel & Brake 56-873 is a seal retainer intended for fixed wing aircraft wheel and brake assemblies. This precision component is classified under FSCG 1630, the federal supply group for Aircraft Wheel and Brake Systems, and carries NSN 1630-01-332-5499. Manufactured in the United States under CAGE code 97153, it is FAA TSO approved and 8130-3 eligible for use in documented FAA maintenance programs.

Seal retainers in aircraft brake systems hold hydraulic or pneumatic seals in position within the brake piston bore or cylinder, preventing seal extrusion and maintaining consistent sealing performance under the hydraulic pressure cycles experienced during repeated brake applications in airline and general aviation service. Loss of seal containment in a brake piston can result in brake fluid leakage, reduced braking effectiveness, or total brake loss, making the seal retainer a functionally significant element of the brake assembly. The 56-873 measures 0.81 x 0.81 x 0.18 inches and weighs 0.01 lb. ECCN is 9A991.d and HTS code is 8807200010.