Industrial B683276X24 Air Brake Chamber MGM Type 24-73-01

B683276X24 MGM Type 24-73-01 is a Meritor service air brake chamber used on heavy‑duty trucks and trailers to convert compressed air into the mechanical force that applies the brake shoes. It is listed under NSN 2530-01-568-8992 and is cataloged as B683276X24 (also shown as B68-3276X24), placing it in MGM’s family of 3276X24 service chambers. The chamber relies on a flexible diaphragm to translate air pressure into linear braking force, a common design in MGM/Meritor SAE 24 service-chamber configurations such as E2-3276X24 and E3-3276X24 documented in regulatory and service literature. This part is distributed and supported by Meritor/MGM channels for consumer and fleet maintenance, and you will find it referenced in dealer catalogs, parts databases, and servicing manuals that cover MGM service chambers for SAE 24 braking systems.