Air leak help needed

[Jeff August]

Ours hisses from time to time after it is shut down, don't know why but
it only does it for a few seconds at a time. When people ask me what is
that I tell them it is alive and it thinks your standing to close! I
checked all the vacuum lines from the brake peddle to the engine and
they all seem OK, does seem to drain the air from the tank for the
step, generator tray and steering wheel.
Jeff & Michelle August
80FC35RB
Plymouth Wi.
--- In WanderlodgeForum@yahoogroups.com, "ttikalsky"
wrote:
> Not sure what the part is that the air is leaking from but hopefully
> someone here does. Under the front left corner near the steering
> gearbox is a black flat "device" with 4 air/vacum line connections.
> There is a fifth nipple that is constantly evacuating air. The rear
> suspension drops when I shutdown the main engine. Sometimes the front
> suspension also drops and one time the air brake system pressure drain
> and the suspension remain inflated. I am guessing the black unit is a
> diaphram for pressure balancing but not sure. Anyone know what this
> is and where I can get a replacement?
>
> Troy, Waconia MN 83FC33