Air leak

[Gardner Yeaw]

Jeff,
I don't believe I have a pump, at least I have never heard it run
and there is nothing in the compartment. I will study the diagrams
and such and begin looking for the vacuume lines and cruise control
components. In the meantime I will seal up the leak and skip the
cruise control.

Gardner
78FC33

--- In WanderlodgeForum@yahoogroups.com, "Jeff Miller"
wrote:
>
> If your '78 has a mechanical (Ghast) vacuum pump in the back of the
> compartment under the co-pilot's seat, this is not an
> aspirator/vacuum-generator. If it is, look for vacuum leaks in the
> cruise control as others have mentioned.
>
> - Jeff Miller
> in Holland, MI
>
>
> --- In WanderlodgeForum@yahoogroups.com, "Gardner Yeaw"
> wrote:
> >
> > I have an air leak in the front of my 78FC33. Lying on the ground
> > and reaching up in the left front there is what looks like a
> > distribution valve. It has at least two thin black hoses attached
> > with screw on caps. When I shut off the coach it leaks for a few
> > minutes then stops. The brake tanks keep about 75 lbs of
preasure,
> > but the step stops working.
> >
> > There is a tube that is designed to have a rubber hose sliped
over
> > it on one side of the valve, I can't see it, but that is where
the
> > air is leaking from, It seemed odd that there would be a slip on
> > connection when all the others are the standard black tube with a
> > screw on connector.
> >
> > Does anyone have any idea what this valve may be for? I had
read
> > that the cruise control used air passing over a venturi to
generate
> > vacuume, could this be it?
> >
> > Thanks
> > Gardner
> > 78FC33
> >
>