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51
Technical Support / Re: Power Gear air Leveling
« Last post by Fred Cook on March 25, 2026, 11:07:20 PM »
Well, I have looked everywhere. Even talked to someone who has the exact identical coach as mine, same year and everything. His aux compressor is located behind the front run box so I looked there and there is none there. He and I agree that the previous owner may have taken it out. The coach originated in Arizona where it rarely gets very cold. I suppose I will be putting another one in.
52
Technical Support / Re: Power Gear air Leveling
« Last post by Steve Huber on March 25, 2026, 04:48:00 PM »
Fred,
Sorry about location issue. I assumed all Roadmaster chassis units were similar. Thanks Keith for correcting me.
Steve
53
Technical Support / Re: Power Gear air Leveling
« Last post by Keith Moffett Co-Admin on March 25, 2026, 01:21:12 AM »
On our 07 Thunder it is located on a plate under the coach but just ahead of the drive axle.  You may be able to see it with a flashlight by looking ahead of the passenger drive wheel but up high.
Yes ours looses air faster in cold weather.
We have replaced the aux. air pump several times and no it doesn’t work even with the OEM from Valid.
54
Technical Support / Re: Power Gear air Leveling
« Last post by Fred Cook on March 25, 2026, 12:14:46 AM »
Steve, are you sure my auxiliary compressor is located forward of the steps on my Patriot thunder? I have looked high and low and everywhere to find that thing and I cannot find it anywhere. It is really baffling. But I will look again to see if I can spot it. Also, what cap are you talking about removing? Are you referring to extending the generator out? I have done that several times and have found nothing. Thanks for your input.
55
Technical Support / Re: Power Gear air Leveling
« Last post by Steve Huber on March 24, 2026, 10:31:53 PM »
Fred,
It sounds like you may have 2 issues. Do you hear a compressor running at night? This would be the auto leveling compressor that senses low air pressure in the leveling system and turns on to add more air. It's located in front of the steps and is accessible by opening the front cap. With the coach losing level overnght you should hear the compressor running. The OEM (Thomas?) compressors were not long lived. Viair makes a cheaper and more reliable unit if that's one or your issues. I posted a procedure to replace the Thomas with a Viair after I did my conversion. I suspect you also have a leak in the left side air system; Bag, Line, or fitting. Only ways to find it are to hear air leaking (if you are very lucky and leak is significant) or to use a soapy water spray and look for bubbles in the aforementioned components and at the auto leveling compressor. Be sure to block the frame up when working under it. The Leveling section in Coach Assist has info that may be of help too. Also, Common Problems has a comprehensive writeup on the Air Suspension system in the Chassis section. It's located on the same web page as Coach Assist.
Steve
56
Technical Support / Re: Removing decorative window cover
« Last post by Debbee West on March 24, 2026, 08:05:49 PM »
Look at the side window trim.  Do you see the screw cap covers on both sides?
Pop yje covers off, now you can unscrew both sides and the entire window
Covering can be removed.  It makes it real easy. 

We just removed all of our window treatments to recover them.

Hope this helps.
57
Technical Support / Re: Power Gear air Leveling
« Last post by David T. Richelderfer on March 24, 2026, 04:17:57 PM »
From my reading here in the Forum, I would say many, if not most, coaches tend to lean... some quickly within a few hours versus some slowly over a few weeks... and anywhere in between for that matter.  Our coach, when parked here over the winter in Yuma has its air dropped, so it's sitting on the bottom of the airbags... thus, no leaning.  When in Oregon over the summer, the coach is parked on a down-sloping side-of-the-garage yard with its tail down and nose up.  There it will sit for several weeks while its nose will slowly settle down a bit to its curbside.  Not much cold weather in our lives anymore!

Only one time in over 13.5 years have I heard the auxiliary compressor running.  I didn't know what the noise was and shut it off.  lol  I later guessed it must have been the auxiliary compressor.  And the noise was coming from between the dash and nose, to the curbside of the generator.
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Technical Support / Re: Power Gear air Leveling
« Last post by Fred Cook on March 24, 2026, 03:02:29 PM »
Thanks, Dave. Just wondering, the coach tends to lean a lot more the colder it gets. Is this a common thing with air level coaches? During warm weather, it stays level for a much longer time.
59
Technical Support / Re: Power Gear air Leveling
« Last post by David T. Richelderfer on March 24, 2026, 12:17:11 PM »
I found numerous messages by doing a search using the argument "aux compressor viair".  Various messages answer all the questions you asked.
60
Technical Support / Power Gear air Leveling
« Last post by Fred Cook on March 24, 2026, 12:55:59 AM »
I have been having problems with my air leveling system. It will initially automatically level fine. But overnight the coach will lean way over towards the driver side. I know I am losing air somewhere, but there may also be a problem with the auxiliary air pump working. I have never worked on a system like this before so I don’t know what that air pump looks like, where it’s located or how to troubleshoot it to see if it even works. Has anybody had any problems like this? It would be nice to have a step-by-step instruction sheet and how to solve this problem.
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