When I leave the coach for 2 days; the air pressure is gone. When I start it, the pressure builds and I can release brakes.
What would I do if the engine would not start and I could not release the brakes; for a tow or pull etc? Is it normal for air pressure to disappear overnight? thanks! Pat
Normal for air pressure to leak down over time. The better your leak control, the longer the time to leak to zero.
With no air pressure and no engine to build it back up, a tow truck connection to your air line connector in one of the basement compartments will introduce pressure to build your system pressure.
If no such connection, the rear break chambers have a hole in the center of them. A tool that is usually affixed to one of the chambers can be inserted and turned to compress the parking brake springs to release them and allow the coach to roll free.
Pat, air pressure loss has and continues to be a much talked about issue with these (and all) coaches.
You will over time get to know your coach and this is one of those things that should be looked into. A spray bottle with soap solution will help you find a lot of these losses but many are internal and not seen. I have found that tank check valves are one of the major culprits and also were the plastic lines go into all the different valves etc. Make it a habit to spray every joint you can get too first then go to the more awkward ones.
JohnH
Thanks for that explanation, Rudy. Always wondered about that.
jor
Until the backed off springs are turned back you have no parking brake or automatic air loss brake application.
Chocked wheels at a minumum.