What does Type 30 or 30/30 mean on an air brake chamber?
The type number is the effective diaphragm area in square inches — a Type 30 has a 30 in² diaphragm, a Type 24 has 24 in². A '30/30' means both halves are Type 30: a 30 service side plus a 30 spring-brake side stacked together, the double-diaphragm spring brake found on drive and trailer axles.
More on Air Brake Chambers
- What air brake chamber do I need for my truck?
- What is the difference between long stroke and short stroke air brake chambers?
- What are the signs of a failing air brake chamber?
- Can you cross-reference Bendix, Haldex, or Meritor air brake chambers?
- Why should you never open or rebuild a spring brake chamber?
- Do you sell air brake chambers in bulk or fleet packs?
- What connects the air brake chamber to the S-cam?