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The Goodrich Wheel & Brake 68-1435 is a PTFE backup ring intended for aircraft brake assembly hydraulic sealing applications. Manufactured in the United States under CAGE code 97153, this backup ring is an OEM replacement component and is 8130-3 eligible for FAA maintenance documentation. ECCN is 9A991.d and Schedule B code is 3926904500.
In aircraft brake hydraulic systems, backup rings support O-ring seals by preventing extrusion of the sealing element into the clearance gap between the piston and cylinder bore under high hydraulic pressure. PTFE provides low friction against the bore surface, resists the hydraulic fluids used in aircraft systems (including phosphate ester and petroleum-based fluids), and maintains dimensional stability across the temperature range of aircraft brake operation. The 68-1435 measures 0.50 x 0.50 x 0.06 inches and weighs 0.01 lb, consistent with a small-diameter backup ring for a compact piston bore. This part ships individually and is available for use in scheduled brake overhaul programs or unscheduled component replacement tasks.
