Checking vacuum operated valves (Was: Auto-Temp help needed)

["Dick Benjamin" <DickB@xxxxxxxxx>]

Thanks for the report.  All of us with Auto-Temp cars will appreciate the
knowledge you have added to our site, especially the idea to substitute
generic check valves for the failed ones in the system.    I'm surprised
that you had so many bad check valves, as I have not had that experience on
my various cars with Auto-Temp.  It sounds like the car you are working on
was used in a dirty environment; somehow some particulate matter got into
the vacuum system.

Dick Benjamin
----- Original Message -----
From: Dennis & Mary Ann Martin <marti595@xxxxxxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Monday, September 02, 2002 6:33 AM
Subject: : IML: Checking vacuum operated valves (Was: Auto-Temp help needed)


Dick Benjamin:
Your helpful information a few days was appreciated.  My friend & I have his
'68 Auto-Temp working much better now.  Still slight problem, but better by
far than when we started.

We have had problems with bad compressor, wrong compressor, bad pushbutton
module, bad control box, questionable replacement control box, stopped up
reservoirs, and of course bad hoses and hoses put on wrong ports by
who-knows-whom.

The check valves were (and still are) all bad in that they have no check
function, i.e., they pass air in any direction through all ports.

The fix for this (which seems to be ok), was to buy ordinary 2-port (in and
out) check valves, available under the "help" label in most parts stores.
We put a new 2-port valve ahead of the "source" port of each original valve.
The original valves still act as 3 or 4 way connectors.

Again thanks for helping us move this troubleshooting project along.

Dennis Martin in warm W. Tenn.