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Old 02-13-2019, 06:38 PM   #1
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Air Leak 2004 Winnebago Vectra 40AD

Where do I start.... There appears to be a decent leak in our air system which works both the air ride suspension and the brakes. In the last 6 months it appears to be getting worse and I can actually hear it when I turn off the coach and it takes a couple of hours to drop from 125psi to 0 which is way too fast. I have crawled underneath twice to listen but I don't want to be under there while it's dropping and not supported so I haven't had the chance to use soapy water and look closely for the leak. When the coach is running it builds up to 125 psi within a few minutes and stays there while driving. But as soon as it's off....the pressure slowly starts leaking until it hits 0. My question is.....where do I start? I've searched online for some sort of trouble shooting process but everyone has a different, unique issue. I know these systems are pretty complex so I don't want to start just tearing into it. I also found that the tank and some of the main lines where it sounds like the leak is coming from is in the center of the coach tucked way back in there and difficult to get access to. I've also heard about pulling the "rip cord" and releasing the air and water out of the tanks but I can't find the valve on my coach. Has anyone with the same, or similar coach, had to trace down a leak like this? Where do you start??? Thanks!
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Old 02-13-2019, 10:56 PM   #2
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I thought my leak was coming from outside and then found out it was the dash gauge. The fitting the line fed onto was cracked. It was a known problem with Freightliner chassis back in '08. Could be the same for '04.
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Old 02-13-2019, 11:05 PM   #3
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Thanks Wayne I read that on another thread. I just haven’t heard anything coming from the dash and one had it apart a few times working on the Sony rear view monitor. But i will definitely check it out. Sounds like the leak is under the chassis behind the front wheels but can’t be sure yet.
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