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.

This category lists 23 Büyükdemir references cross-referenced against 39 original equipment numbers. The cross-reference tables cover Iveco, Renault, Scania and Volvo parts. Dimensions runs from 9" to 36" across 10 versions.

Most looked-up references in this group: Diaphragms / Membranen 8-1682, Diaphragms / Membranen 8-1710, Diaphragms / Membranen 8-1680, Diaphragms / Membranen 8-1678, Diaphragms / Membranen 8-1713.

Manufactured by Büyükdemir Otomotiv in Istanbul, a producer of truck and trailer air system parts since 1957.