Front air bags deflating

[Jeff Miller]

The front and rear air gauges are for the front and rear brake
systems, will not drop below 75psi unless the brake system has a leak
(well, will eventually but usually not for days).

The accessory system is shared by the air step, air suspension, seat
slides, vents, horns, etc., and will often lose air fairly quickly
due to a leak in any of these system.

A common culprit is the air step, if you hear it leaking it will
drain the system and eventually the airbags. Another common cause in
the pre-'84 is the vacuum generator / aspirator for the cruise
control. Any leak will eventually drain the airbags.

Why the front often drops and not the rear I haven't looked into,
I've seen it on several coaches, possibly the front leveling valve is
using more air to keep the front up.

- Jeff Miller
http://www.wanderlodge.net
http://www.millercoachworks.com


--- In WanderlodgeForum@yahoogroups.com, Curt Sprenger
wrote:
> I have the same problem but the time is an hour plus. Will be
interested
> in the replies.
>
> Curt Sprenger `87PT38, Anaheim, Calif.
>
>
> jdlashua wrote:
>
> > My front air bags deflate about 5 minutes after I secure the
engine.
> > The pressure gauges for F/R air tanks remain good. The low
pressure
> > warning light doesn't come on. I've dumped and refilled several
times,
> > but still does the same thing when I shut down. Is there a check
value
> > in the height adjuster or somewhere else that may be giving way
or am I
> > looking for a slow leak in one of the lines. Anyone have any
advise how
> > I troubleshoot this?
> >
> > James Lashua
> > 84PT40
> >