BCM Community
Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: scott332 on May 12, 2010, 05:37:32 PM
I am starting to chase down air leaks on my MC12.
I am working on some air pressure regulators that are leaking around the diaphragm.
Is there supposed to be air constantly coming out of the small hole in the cover?
I have 2 regulators in the shop that I'm working on. One leaks air out of the hole, the other one does not.
The parts manual has 2 different part numbers for air pressure regulators, but does not specify what the difference is between them.
No the air regulators should not leak --- I don't know the difference between the two different part numbers.
HTH
Melbo
If they have flat diaphragm Dallas has a link showing how to rebuild them using silicone sheeting. worked for me. Saved a few bucks and singlehandedly saved the planet
all of the regulators on my bus are Williams WM-279-E1. They just block the flow of air over a certain pressure, adjustable with a spring preload screw. No leaks allowed, anywhere. I got a rebuild kit from Luke that worked fine, it replaces the whole insides not just the diaphragm, and I bought a spare new one to carry around to guarantee that none of them ever fail again... ::)
Kit was cheap, new unit was less so, but I have this theory that if something breaks the other ones are close, so I like spares. If you go on the Williams website there are data sheets for each model, and there are a ton of different models.
Brian