BAC Forum
General Boards => Technical Support => Topic started by: Bob Disney on January 29, 2024, 05:48:49 PM
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Currently the air seal at the entry door does not function
upon inspection it appears to be intact
It has not been working since we purchased the coach
We get a lot of wind noise through there
I have been under the coach and it seems everything is there,
I don't know how to trouble shoot it as the coach should be running and in gear if what little I know is correct
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I think I saw the door air seal listed at Northwest RV Supply in Eugene Or. Not cheap as I recall.
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There are magnetic switches in the door frame that tell the air system when the door is closed, like there are switches for the entry step. Right off the top of my head I can’t say which are which, but the wires to at least some can be loose and be accessed from inside the curbside wheel well. One may be in the side of the frame toward the cap. The switch mounting screws may just need adjusting to align correctly when the door closes. Also the airline to the bladder may be unsecured to it or damaged. It might be found from under the entry step/front cap area. Others here can hopefully clarify.
Joel
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Bob,
As I recall, I think the final signal to actuate the bladder is the park brake disengaged which completes the ground circuit?
Fred
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Bob
As Fred says the parking brake may be your switch point but I do remember reading somewhere that the air bladder is only inflated when the coach is placed in drive.
The door can't or shouldn't open when the bladder is inflated
The bladder is inflated by a solenoid valve which should be located behind the front cap near the right frame rails there will also be a pressure regulator mounted with the solenoid valve this regulator should be set at no more than 5 psi
Depending on year the coach may have either a regular solenoid valve or a Mac style valve .
If you can locate the valve disconnect the air line running to the bladder and have someone put the coach in drive while running to see if you get any air movement.
You should be able to check for the electrical signal at the valve as well.
Hope this helps
Eric
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That is so simple it evaded me
Great idea
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admin: delete
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As suggested, the bladder can be inflated while in Drive, not necessarily with the parking brake off. Many a bladder has been damaged by a copilot or late entrant reshutting the door after the driver put the coach in gear with or without his foot on the brake.
The following diagram may help, as there is commonly an adjustable solenoid that may need tweaking or cleaning. A hose or wire there could be the culprit as well. My first easy and obvious test would be checking the bladder integrity by leaving the door open, start the engine, and with your foot on the brake or parking brake on, put the rig in Drive to see if the bag inflates. Sounds like you already know the result. Then check the solenoid/regulator function and all connections to and from. Don't overpressuize the adjustment, as per the 5psi warning. It may be as simple as a tech or rock bumped the adjuster knob to completely off.
Joel