Bus won't drop air

[Mike McMahan]

My understanding is that their is a saftey on the system that will
not let you dump the suspension without x(don't remember how much)
pounds of air pressure at the valve. I remember on my 82 PT40 this
happening. Once I started the engine and built up some air pressure
it would dump. You will probably find an air leak in the system.
Mike McMahan 1989 PT40

--- In WanderlodgeForum@yahoogroups.com, "Bob Lawrence"
wrote:
>
> Thanks for all the replys...this has happened twice before..don't
> know why..my gauges show 120 psi.
> Probably will start engine tomorrow and totally air up, then will
try
> again.
> Question, where is the main dump valve?
> Bob Lawrence
> 84 PT36
> Tacoma, Wa.
>
> --- In WanderlodgeForum@yahoogroups.com, "mbrund" <mbrund@> wrote:
> >
> >
> > You might check the fuses, the dump valve is electric operated.
On
> > the 1992 model that fuse (SK32) controls the main suspension and
> tag
> > dump valve, as well as the valve that open/closes the fresh air
> > intake to the drivers area.
> >
> > Michael Brundridge
> > 1992 WB40
> > Georgetown, TX
> >
> > --- In WanderlodgeForum@yahoogroups.com, "Bob Lawrence"
> > wrote:
> > >
> > > Hi group,
> > >
> > > Just a quick question...got back from the shop having had new
> > leverers
> > > installed in front and rear.
> > > After getting into my spot tried to drop tag and main
suspension
> > dump
> > > valves and air wouldn't drop.
> > >
> > > Where do I look for this problem?
> > >
> > > Bob Lawrence
> > > 84 PT36
> > > Tacoma, Wa. (with 21 days left up here before we fulltime
south)
> > >
> >
>