The diaphragm is the working face of an air brake chamber: air pressure acts on it and pushes the rod out to apply the brake. It is a wearing part, replaced when it hardens, splits or lets the chamber leak, and it must match the chamber’s stroke class as well as its size.
Key data for this version: dimensions 20". The Buyukdemir reference is 8-1663.
It belongs to the Normal stroke range in the Buyukdemir catalogue.
It cross-refers to the original equipment numbers 897 120 520 4, 000 431 07 28.
Manufactured by Büyükdemir Otomotiv in Istanbul, Türkiye, a producer of compressed-air brake and pneumatic components for trucks and trailers since 1957.
