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Old 03-02-2017, 01:18 AM   #1
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Air bag dump

I have a 2008 40' Charleston, I was told I need to dump the air out of the aid bags before lowering the leveling jacks. I can't find a switch to dump the air. Does anyone know what I'm doing wrong.
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Old 03-02-2017, 11:44 AM   #2
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When you hit the auto level button you should hear and feel the air going out of the bags and the coach lowering itself. Only after it lowers itself will the Jacks begin to operate and level the coach.
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Old 03-03-2017, 04:32 PM   #3
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I do hear a quick SWOOSH but now enough to lower the bags, no change in level. Is this the way it should be?
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Old 03-03-2017, 04:51 PM   #4
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You should feel the entire coach lowering itself. Are you sure you're hitting the Auto level rather than Manual leveling?
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Old 03-03-2017, 04:53 PM   #5
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Of course first the coach engine will have to be run for a while to get the airbags filled.
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Old 03-04-2017, 09:38 AM   #6
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Air Bag Dump

Hi pidoma I have a 2007 Charleston 40QS and I have questioned the same thing. I have talked to Freightliner and Forest River was told that on mine that they call it Auto Dump. Now it does not dump and then the jacks level the coach but as the jacks lift the coach it pulls down on the air bag valve levers ( two on the rear and one in the front ) and releases the air. This is so the air bags are not full when the coach weight is taken off the suspension. You will notice that when you raise your jacks that the coach will sit very low with the wheels tucked up in the wheel wells and as air builds up that the bags will lift the coach back up to normal height. I wish I had a dump lever in the drivers area but no such luck. What I do is is use manual to lift the coach enough to deflate the air bags, if you get out and listen by the wheel well you can here the air escaping. As this is going on I pull a few things out of the basement, hook up my water ect... I then go back inside and put level system back to on and push retract all and let coach down until jacks just come off the ground then stop and hit auto level and done. This way the coach is lower when level and bottom step is not to far off the ground. Then open my slides and crack a cold one. Hope this makes sense and helps.
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Old 03-04-2017, 09:54 AM   #7
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Sorry for giving wrong information. I assumed that the Charleston and Berkshire operated the same.
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Old 03-04-2017, 11:46 AM   #8
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Hi dan-nickie nothing to be sorry about these RVs are all different even the same brands. It drives one nuts trying to figure something out and even the same year and model are not put together the same. I also have a situation that if I turn my key switch to ACC it will go right to retract all jacks?Talked to tech at Power Gear and he said that FR might have wired it that way as an emergency retract in case jacks will not retract with power panel but he was not sure.Talked to FR and they had no answer. Have put it out on a few forums but no replies . I don't use ACC for anything as I just always use my jacks with the key to the on position as stated in my book. Oh well at least it all works
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Old 03-04-2017, 11:53 AM   #9
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Great idea, sounds like you spent time to figure this out.
Is it possible to add a manual air dump valve independent to the auto levelers,
I bought a air dump valve but before installing want to be sure it doesn't conflict with the auto levelers, anybody with any experience with this would be helpful.
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Old 03-04-2017, 03:13 PM   #10
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Not sure if a dump valve will work but I don't know why not. A few years back in was at Freightliner in Gaffney SC and the tech told me that my coach is wired for a dump valve but there is not one. Can't figure out why the factory did not do this in those years? I've seen all kinds of class a coaches that have a dump lever. If you find out if it will work please post it and you can give me a PM because I would love to be able to just dump and then level .
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