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Old 06-07-2017, 06:18 PM   #1
Rivet Master
 
1989 34.5' Airstream 345
Ebro , Fla Panhandle
Join Date: Jul 2013
Posts: 1,211
Rear axel leveling valve

I'm in the process of preparing my 345 for a trip to northern Ca.

After a shakedown run I'm finding that the leveler valve inside the tag wheel on the drivers is blowing air even when parked on flat ground. Can get it to stop by tweaking the handle like protruding part. Plus the compressor is running a lot while driving.

I've done some searches here and looked thru my manuals.
Just not finding any details about these valves.

Are they serviceable, anyone dealt with them?
If it's a replacement item, what part number, and where to find them?

Also need to replace the house batteries, any recommendations short of those super expensive Lifeline batts? Would like closed cell deep cycle batts.
Type and brand recommendations appreciated.

Cheers Richard
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Old 06-07-2017, 10:14 PM   #2
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1982 28' Airstream 280
Port Angeles , Washington
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You can try adjusting it. If the adjustment is out it may be trying to twist the frame and axle against the other valve, assuming you have two valves.

They used to rebuild them years ago but now it's cheaper to buy new. Once you get it off, take it to any heavy truck parts supply for a matching replacement. If you want to order one, SD Truck Parts can fix you up.

No help here on batteries, I just go to Cost-co.
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Old 06-08-2017, 12:03 PM   #3
Rivet Master
 
1989 34.5' Airstream 345
Ebro , Fla Panhandle
Join Date: Jul 2013
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Thanks Dan for your reply.
There are leveling valves on both sides, the one on the starboard side looks like it may be original. And does offer some possibility of adjustment.

The one on the port side, the one that is leaking may have been replaced and is different from the other one. Looks newer and I don't see any adjustment possibility.

I and my floor Jack are tied up right now reinstalling the engine in my Porsche.
So I can't dig deeper into it right now.
But do want to order parts if needed.

This what the passenger side looks like. There is room to slide one of the bolts connecting the linkage to the valve for adjustment.
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Old 06-08-2017, 12:14 PM   #4
Rivet Master
 
1989 34.5' Airstream 345
Ebro , Fla Panhandle
Join Date: Jul 2013
Posts: 1,211
The one that is leaking does not offer the same adjustment.
It has a sticker saying Haldex. 90554928

So any guidance on the best part to get is what I'm looking for. Installing the exact same part seems easiest. But I don't want to get a failure prone part.

Anyone gone thru this part before. Insight would help.

Pic of port side.
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Old 06-08-2017, 12:54 PM   #5
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2017 26' Flying Cloud
Tampa , Florida
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Just for fun I entered "90542928 Haldex" into Amazon's search box.
I came up with a bunch of valves.
They're in the $50-$75 range.
This one looked close to yours.

https://www.amazon.com/Haldex-Midlan...0542928+Haldex

You might also check truck repair places as I'm sure they see their share of ride height adjusters.

Or e-bay.
http://www.ebay.com/bhp/height-control
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Old 06-08-2017, 01:00 PM   #6
Rivet Master
 
1989 34.5' Airstream 345
Ebro , Fla Panhandle
Join Date: Jul 2013
Posts: 1,211
Hold on now, Dan was correct, I was able to determine that there is some adjustment available in the leaking valve linkage. It was hiding under a washer.

So I loosened that nut and low and behold it could slide up and down.
Made the adjustment and whew, was able to get it to a spot where the leak stopped.
By the time I got myself dusted off and stepped into the coach the compressor had shut itself off.
I do wonder about having both sides set at a matching height.

Sure do like fixes like that. I'll certainly be keeping an eye on it, but do feel this may have been what was needed.

THANKS DAN!

Cheers Richard
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Old 06-08-2017, 03:54 PM   #7
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1982 28' Airstream 280
Port Angeles , Washington
Join Date: Aug 2008
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The function of the valves are basically the same. Some have a delay built in and the mount and port position may very but they all let air in or out to keep that arm and the vehicle height in the same position.

You have a system where those valves are working not only with vehicle height but how the tag and drive axle function together and also work with the front axle. If you have a sagging front right spring, it will load the rear right and that valve will add air to keep the rear at the proper height putting a twist to the entire frame and coach body. My old bus had 4 bags up front and 4 bags in the back. There were two valves in the back and only one in the front so you could level the coach without twisting it.

If you can get to a scale and weigh each wheel independently you can get a better idea of what is happening. I weighed a 40' SOB once that was 1100 lbs. heavy on the right front wheel and light on the right rear because the front right valve was set high. It had a leveling valve in each corner.

The air spring systems can be finicky but when they are set up correctly they are great.
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