Testing compressor?

[Gregory OConnor]

Chock the tire after the tanks are full. Then check the park brake
diaphram by releasing the parkbrake with the engine off. If you hear
air passing at the rear axle, the brakes are leaking while in
transit.
there is a blurb that explains typical airbrake components that may
be helpful to read before you speak with the tech

http://www.flxibleowners.org/flxbk/abrks2.htm

GregoryO'Connor
94ptRomolandCa

--- In WanderlodgeForum@yahoogroups.com, "Ryan Wright"
wrote:
>
> Is there an easy way to test the air compressor on my coach? The
coach
> just doesn't air up like it should - seems to take forever, even
at a
> high idle it does not build and maintain air pressure very well.
Once
> on the road, actually driving, everything is fine. Pressure builds
> rapidly and stays. But moving through parking lots at low speed
gets
> interesting as air pressure drops dramatically with each press of
the
> brakes and does not build back up for a considerable length of
time.
>
> I know something has gone wrong because I didn't have this problem
> when I bought the coach. While I still have a couple of tiny air
> leaks, they are very minor. I aired the coach up with my shop air
> compressor and listened for leaks, I've found two small leaks in
the
> engine compartment that I'm working on but there's no way they are
> venting enough air to cause this. The coach does air down fairly
> rapidly after stopping, though. Suspension stays aired up but the
> step, for instance, will give up and come out within 5 to 10
minutes
> of turning the engine off (even if not used).
>
> I have an appointment to have it looked at by a local shop on
Friday
> but was hoping to get a head start, maybe save myself some labor
> charges.
>
> -Ryan
> '86 PT-40 8V92
>