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Old 07-05-2016, 02:11 AM   #1
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Location: Maple Valley Wa
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filling my airbags manually on a 1990 concept

So hopefully someone has the answer to this awesome dilemma I got myself into,

I have an intermittent leaning problem with the coach, at times it lists pretty bad, usually while driving and when stopped it sometimes settles to ride height and sometimes does not.

Anywho I have come up with several different methods to try to recreate these conditions and one of the requires filling the airbags manually. The coach manual says there are 2 quick connects in the right rear and one under the passengers front. The problem is I do not have them. I have the electric dump valves, 2 in back and 1 in front. I tried to screw an airhose into the threaded dump valve but it does not seem to be filling the airbags. So how do I fill them manually with the electric valves in there. Do I have to disconnect the wires to the other valves and hit the dump switch to open the one I want to fill?
This is turning into a little bit of a who done it.
And yes I have verified that the ride height is correct and the ride height valves seem to be operating as they should. I and going to have to do a deep dive into trying to recreate the problem and I would rather not leave the engine running for hours while I do. also with the engine running it is hard to hear the sound of air leaking...

Air leak/bad fitting being the most likely culprit at this point

Any idea on the best way to tackle the manual filling would sure be appreciated.
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Old 07-05-2016, 08:58 AM   #2
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You do not likely have any access to air system in that year.

There is a fitting to use on board air for tires but on ours it is check valve protected.

My guess is you have a leveling valve that needs adjusting.

Using phone now so difficult to post links but you can search for a thread we posted years ago regarding adjusting the valves as we detail the process.

In short the internal parts need adjustment to insure the valve fully closes off when centered and it is simple to do once you can figure out how to reach the valve.

You will need jack stands a couple wrenches and a screwdriver.

Get it up in the air and after filling air shut engine off and do the task.
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Old 07-09-2016, 09:07 PM   #3
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Cntrylife-

On my coach there are two quick connect couplers; one in the forward compartment where you electric connotes sir is located, and one in the drivers' side rear electrical compartment where your 50 amp connection is located. I have used the forward coupler to air up the air bags but as your coach does not have the air leveling option you may not be able to do the same. The automatic air leveling system on my coach also uses the electric auxiliary compressor (in addition to the engine driven compressor) to maintain suspension system air pressure. I believe you should still have the two couplers regardless of the air leveling option. Call me if you can't find them.

Russ
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