Community Forums

1ghostrider · 08-06-2020, 07:20 PM

I have noticed lately that when I park the coach in the garage overnight the coach will lean to the drivers side over night. I have it at the diesel shop and they noticed the same thing. I didn't measure the air bags but I measured from the ground to the top of the wheel well and the passengerside was 40 1/2 " on all three wheelwells. The driver side was 40 on the tag, 39" on the rear dual and 37/12" on the drivers front. Is each airbag independent of each other or is each side tied together. How does the HWH system tie into this air system? When I let the coach sit overnight I do not operate the air leveling system. If I had an air leak in a front air bag would it only affect the front air bag or the entire drivers side?

Thanks for you input!

kenwyatt · 08-06-2020, 07:43 PM

When mine was doing that it was a leaking hose between the ping tank and air bags. There is a long post on that with pictures. The way mine works each “corner “ is isolated by check valves in the manifold so yes depending on what is leaking just a side or corner can be affected and if the rate of leakage exceeds what the aux compressor can handle or it is not in automatic leveling it will leak down

hypoxia · 08-08-2020, 05:40 AM

The rear ride height valve on that side is my first suspect.

https://www.irv2.com/forums/download...do=file&id=298

CountryB · 08-18-2020, 10:25 AM

Quote:

Originally Posted by 1ghostrider

How does the HWH system tie into this air system? When I let the coach sit overnight I do not operate the air leveling system. If I had an air leak in a front air bag would it only affect the front air bag or the entire drivers side?

Thanks for you input!

The HWH leveling system is an add on" to the standard air bag system. Normally the air goes from the air tank to the "Ride Height Control" valve and to the air bags. There are two RHC vales at the rear axle and one RHC at the front.

When the HWH system is installed there is a "valve/manifold bank" (a.k.a. 6-pack manifold) installed at each RHCV location - so the air then goes from the air tank to the RHV and through the HWH manifold to the air bags. So in Travel mode (a HWH mode) the air passes straight through the 6-pack manifold and only the RHC valves are doing the leveling.

When you put the HWH into "Leveling mode" the Travel valves close and the HWH does all the leveling through its Raise and Lower valves. When the Travel valve is closed it is an isolated system so even if the air tanks leak to zero the air bags will still retain air pressure (unless they are leaking too).

When the HWH is "auto-level" mode, it will level the Coach then go to sleep and wake up every 30 minutes or so to check leveling. If adjustments are needed the HWH valves (Rise or Lower) will open/close as necessary.

If the Coach air system is low (or empty) on air, there is an electric air compressor that will come on to fill the air bag(s) as needed. But the air bags should hold air even if the main air tanks leak to zero, since the air bags are isolated from the rest of the air system. It sounds like you have some leakage at the air bags or related plumbing since your Coach is leaning after a while.