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Old 03-16-2019, 06:49 PM   #1
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Air ride suspension

I have never owned a mh with air bags. So, question; can you let out/dump some of the air to lower the coach an inch or two, and still move the coach. (as in: Back into garage) my door and the height of the mh are essentially the same! Wanting to know if i have to remodel the door! The mh in question will be a tiffin pheaton if that makes a difference.
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Old 03-16-2019, 07:14 PM   #2
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If yours is like our Damon, you can lower the bags and the coach will lower a few inches. When you start the engine it starts pumping air and will inflate the bags when you put it in gear.
If your luck and memory is as bad as mine, some time in the future you will forget to lower the bags and back into the top of the opening, damaging the coach AC and other things or air up before and hesitate for some reason and hit it going out - same results.
Spend a few bucks and save a few thousand.
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Old 03-16-2019, 07:15 PM   #3
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yes without any issues. they have solid rubber stops inside so no damage to them
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Old 03-16-2019, 07:36 PM   #4
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However, they will automatically try to keep the ride height when the engine runs. On some you can keep it lowered, most not though. It's a safety feature.
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Old 03-16-2019, 08:57 PM   #5
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The problem you will have is no air to the brakes, without air you cant release them. if you can they are in serious need of adjustment. The bags generally air up before the brakes release. If you can't clear with fully inflated air bags I wouldn't plan on going in there.
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Old 03-16-2019, 09:10 PM   #6
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You should have a ďsuspension dumpĒ built into the levering system, or a flip lever some where by the trans controls. If you do no have a dump feature( some donít) then you canít. But if you do, thereís no damage/harm moving the coach around with the bags deflated
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Old 03-17-2019, 06:18 AM   #7
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Quote:
Originally Posted by spdracr39 View Post
The problem you will have is no air to the brakes, without air you cant release them. if you can they are in serious need of adjustment. The bags generally air up before the brakes release. If you can't clear with fully inflated air bags I wouldn't plan on going in there.
This is incorrect, air break system tank will air up to 75psl before system will allow air to go to air bag tank. If you have a dump valve, it should be near the driver side dashboard. You can remove all the air from just the bags and it will not dump the holding tanks. You air brakes will still work and you should still see 125psi on you gage
But it would be best to modify your garage if you can. The components on the roof will be more costly to repair
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Old 03-17-2019, 09:11 AM   #8
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Agree with Nathaniel - the brakes air up first, a safety precaution. You will have brakes as long as the system has air pressure (about 60 psi). Most, but not all, air suspension coaches have a "dump" feature that releases air from the suspension. In a few, it can be temporarily set to that lower level, but in most the air compressor immediately begins trying to replace the lost air. You have to hold the air dump button down to keep releasing air as you drive, and most can only drop the height a couple inches.
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Old 03-17-2019, 10:42 AM   #9
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Hi ! Welcome to IRV2! We're sure glad you joined the gang!

I've been told, but never tried it, that on our Windsor I can use the "Dump" button to dump the air and continue to hold down the button to prevent the bags from airing back up, while pulling forward or backing up ? ! Have fun and keep her between the ditches!

Good luck, happy trails, and God bless!
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Old 03-18-2019, 10:58 AM   #10
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Quote:
Originally Posted by 6Cats View Post
I have never owned a mh with air bags. So, question; can you let out/dump some of the air to lower the coach an inch or two, and still move the coach. (as in: Back into garage) my door and the height of the mh are essentially the same! Wanting to know if i have to remodel the door! The mh in question will be a tiffin pheaton if that makes a difference.
6cats.
As has been stated, you're gonna have problems if you try what you're thinking of. A very large percentage of air suspended coaches, utilize what's called "ride height sensors, to keep the coach at a specified height while it's running and or driving. No matter what the load is on the coach, light or heavy, the ride height sensors will compensate for any adjustments needed. I'm by far, no expert but, in some cases, at least with ours, the only way to dump the air from the bags is to set the parking brake due to its interface with that system.

If I were to shut down the engine, set the brake, then dump the air, it will dump. But, if I were to start the engine back up, naturally I can't move until the parking brake is released, that will auto-trigger the ride height sensors to start filling the bags. Now, will yours do that, not a clue. You don't say what model/make/year/chassis/engine.
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Old 03-18-2019, 09:18 PM   #11
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Guess you know by now not all systems work the same. I can dump the air on my Freightliner/Fleetwood, and move the coach to put in a shed like you asked. If I get up to about 5mph, it will automatically air up.
Don’t know what the Phaeton controls do.
We need more info on the chassis and age.
You say you don’t have an air bag coach, how do you know it won’t fit? Don’t go on the height the brochure has.
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Old 03-19-2019, 04:25 PM   #12
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FIREUP gave you some great info.

Since you haven't purchased it yet, test it with the dealer BUT read the OP Manual on this as many say they can. I drove my DP right after I bought it before the AP came up to 130. Made a 90* left turn and hear front tires rub on wheel well. Thank you Lord I was full enough to do no damage. Then I learned that the drive train lines up in proper angles ONLY when my DP is at ride height.

Again, check it out with the dealer then try it right there using their people to spot you for backing up with low AP and measure tire well to rims on front and rear tires BEFORE and After to insure it didn't rise to far or too fast.

Best wishes with your selection - Richard
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Old 03-19-2019, 05:32 PM   #13
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Originally Posted by alank View Post
Guess you know by now not all systems work the same. I can dump the air on my Freightliner/Fleetwood, and move the coach to put in a shed like you asked. If I get up to about 5mph, it will automatically air up.
Donít know what the Phaeton controls do.
We need more info on the chassis and age.
You say you donít have an air bag coach, how do you know it wonít fit? Donít go on the height the brochure has.
Agree. I can air down and drive RV. Turn wheels and have brakes. People freak when you air down with wheels turned. I did have to hold dump button on leveling keypad
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Old 03-19-2019, 05:58 PM   #14
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Agree. I can air down and drive RV. Turn wheels and have brakes. People freak when you air down with wheels turned. I did have to hold dump button on leveling keypad
And rightly so. So many think that ALL coaches are built the same. There are some (maybe the majority, maybe not) that, if you DO turn the wheels with a dumped system, you're gonna turn them right into the interior of the body panels. And you say you have to "hold down the dump button" on the control panel? I'm only assuming that you're thwarting the ride height sensors by doing that. I am no expert at this stuff, only what I read in manuals and how ours works. As state, I can't move our coach if the system is dumped. And they only way it dumps is when the parking brake is on. Release that parking brake and, up goes the air bag system 'cause the ride height sensors now have control.
Scott
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