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Old 04-23-2017, 07:28 AM   #1
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air bags deflated when stored for one week

I have read a number of threads regarding this issue but can't seem to find a conclusive answer. We recently drove our new MH north for the summer and parked in an outdoor lot outside of the city. After a week I went to check on things and noticed that the airbags had deflated and the coach was sitting very low to the ground. Should I be concerned that the bags deflated within only one week? Also - any thoughts one way or the other on lowering the coach manually when storing for short periods of time between trips?
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Old 04-23-2017, 07:34 AM   #2
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You have an air leak. Make up a spray bottle with a few drops of dish soap and water. Pump the bage up and start spraying.
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Old 04-23-2017, 07:36 AM   #3
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2 or 4 airbags.....and some or all had deflated? What psi readings are you seeing now...and what were they previously ?

If the ambient air temp drops 20-30 degrees, you will see some deflation. Any of this helpful ?
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Old 04-23-2017, 07:58 AM   #4
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first call the FL Hotline 24/7 number.
What they may tell you, is that is normal.
If memory serves me correctly, there there always be loss of air. How long it takes is the question.
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Old 04-23-2017, 08:30 AM   #5
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I think that is normal, mine have always leaked down in a few days.
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Old 04-23-2017, 11:16 AM   #6
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It takes about a week for our air to leak down. If I am parked that long I generally lower the jacks.
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Old 04-23-2017, 11:27 AM   #7
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Is the coach on level ground , side to side , end to end ?
Any slope could accelerate air loss from the air bags?
The other question is what air pressure do the tank gauges show ?
Do both tanks show the same? Air suspension should only be attached to one tank.
The system's " brake protection valves " should isolate the air suspension from the rest of the air system at 65 psi, to keep enough pressure, in the tanks, for brake operation in case of an air suspension bag rupture.
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Old 04-23-2017, 01:59 PM   #8
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My coach will lose air over a few days. I broached the question of how long it should stay up in another forum. The response was that it varies from coach to coach - losing over a few days does not a problem.
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Old 04-25-2017, 07:20 PM   #9
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thanks everyone for all the replies. I had the coach in for service this week (at our local freightliner dealer) and had them check it out. They said it is definitely not normal for the bags to deflate that rapidly (one week) - they checked and I did have (at least one) leak which they say is not out of the ordinary for newer coaches.
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Old 04-25-2017, 07:33 PM   #10
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No air system is leak free. They will all leak down. It's normal.
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Old 04-26-2017, 05:26 AM   #11
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As a side note on air leaks, when I drove over the road the D.O.T. standard for air leaks was, with the system fully aired up, engine off, and brakes applied, air loss of over 10 PSI in 2 minutes was excessive.
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Old 04-26-2017, 05:50 AM   #12
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I dump my air when I park. Should I not do that?
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Old 04-26-2017, 05:56 AM   #13
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Quote:
Originally Posted by Belgique View Post
I dump my air when I park. Should I not do that?
I don't see any reason not to. I don't dump ours but like others they will go down by themselves after a while. I never really took notice of how long. We parked it last Wednesday and I think they are all the way down so a week or less does it. They will go right back up next time I start it.
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Old 04-26-2017, 06:24 AM   #14
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Interesting discussion--with lots of opinions too. The bags on my 14 year old DP stayed inflated for weeks [basically indefinitely], until about two years ago. Then, the front bags started deflating over a period of several days--rear bags remain inflated [no air loss from reserve tank]. Suppose it could depend on brand of coach or the suspension system installed--but my "opinion" is that bags are designed to stay inflated. Suspect I have a small leak in one of the front valves [dump or leveling], or a hose connection. So far, this leak really doesn't seem to be a problem--eg, bags stay inflated while driving, engine compressor is not running excessively. One of these days, may try the soapy water trick to locate leak.....
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