Starting pressure at zero (was:Thomas versus Dana)

[mark grady]

Richard --

> I have the Electro-level I.
>
> When the air bags are full (i.e. coach at "travel" height) and there is
> no pressure in the air reservoir, and when I turn the ignition on and
> flick the switch to travel auto, it takes about 10 seconds for the
> pressure to build from zero to 120 psi in the air tank. This is the
> point at which my pressure switch shuts down the compressor.

Uhhh... Richard, I'm wondering why your air tank would have zero pressure.

Is your check valve working?

Do you have an air leak in the schrader drain valve in the tank itself?

It's not a big deal or anything, but if your system is tight, your tank
should always have pressure in it.

Just a question.

Mark Grady
'77K

mailto:mgrady

 

[richard guthart]

Mark,

When I started working on the air system, both the schrader valve and
check valve were leaking so I replaced them.

Still have minor leak(s) to track down. If I set switch to "hold" the
tank bleeds down in 20 minutes or so.

(To get the time measurements for my recent post, I deflated the tank
using its schrader valve.)

BTW, any tips on where to look for the slow leak if soap solution
reveals no apparent leaks from all tubing fittings?

Richard

>Uhhh... Richard, I'm wondering why your air tank would have zero
pressure.
>
>Is your check valve working?
>
>Do you have an air leak in the schrader drain valve in the tank itself?
>
>It's not a big deal or anything, but if your system is tight, your tank
>should always have pressure in it.
>
>Just a question.
>
>Mark Grady
>'77K
>
>mailto:mgrady
>