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Old 01-01-2011, 06:03 PM   #1
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Air Suspension

I am working on a 2002 DS-01 Travel Supreme 38". Every time the customer stops for fuel, by the time he is finished fueling the front suspension loses all of its air and drops the front end. The only audible air leak is from the air ride leveling vale in the rear. This air leak lowers the secondary air tank to 65 psi. then quits. I can't figure how the rear air bags can effect the front air bags. I would appreciate any feedback concerning my problem.

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Old 01-01-2011, 06:39 PM   #2
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A Wild A__ Guess...........
When the rear lowers could the front then be dumping air to re-level I would think you should be air tight if the coach is simply stopped.

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Old 01-01-2011, 06:41 PM   #3
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Likely the problem is in the automatic leveling system. It works by first dumping the air in the front air bags before lowering the hydraulic rams. I would start by checking the Hadley air leveling system controls and then move to the air/hydraulic system. It sounds like there may be a relay stuck that is dumping the air in the front bags in anticipation of leveling the coach. All just my opinion and experience with my 07 travel supreme.
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Old 01-01-2011, 07:22 PM   #4
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We had a problem airing up after being parked . It was taking way too long after we had motion control units added to the air lines. It was inspected at the Tucson Freightliner Shop and they said that they could not find a leak, but it drove great after the air was at a drivable level and maybe the MCU's made it air more slowly. Just the front dropped like yours did. Then we took the coach to the Winnie dealer in Tucson. The service advisor was sitting at his desk in the office. He looked out the window and said, "I can see that you have a leak in the front air lines." He made this observation without getting up. A check of the coach revealed that one of the MCU's in front was improperly installed and caused an air leak. It was replaced along with a section of the air line and all was well. How Freightliner could miss this I don't know. I would have the air lines checked. The leak might not be loud enough to hear, just like ours. Happy Travels , Joe
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