Hey Dennis,

Thanks for the input.   I've replaced the compressor, expansion valve and
the receiver/dryer and several
gaskets all to have the system still leak out.   What else leaks?

Steven

On Tue, Jun 15, 2010 at 9:34 PM, Dennis Haynes <d23haynes57@hotmail.com>wrote:

> Proper charging of an automotive AC system, (or most AC systems) is done by
> weight. System pressures are then the result of proper operation and
> external conditions. When using r-134A proper fill is approximately 85% of
> the fill for R-12. As R-134A is azeotropic, (I think I got that right) it
> is
> a poor practice to top leaky systems off. If it needs more than 10% you
> should fully evacuate and recharge.
>
> Dennis
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Ken Wilford
> Sent: Tuesday, June 15, 2010 10:25 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Need AC chart expected measurements...
>
> Steven, I use the AC chart from any other VW Bentley from the 80s or
> early 90s.  They all have them except for the Vanagon.  On the low side
> you want to see between 35-40 psi wen fully charged.  The high side goes
> up to around 250 psi, maybe higher when fully charged but I usually just
> pay attention to the low side unless the system is fully charged and
> still not working properly.  Also the low side metal pipe coming out of
> the compressor will start to get cold and stay cold when the system is
> about full.  I have been servicing these systems for many years and if
> you follow these guidelines you should be able to charge a normal
> system.  If you have any other questions please feel free to pmail me.
>
> Ken Wilford
> John 3:16
> www.vanagain.com
>
>
> Steven Johnson wrote:
> > Hi folks,
> >
> > I'm using a manifold gauge set on my '91 Campers AC system and cannot
> find
> > anything in the Bentley that shows what pressure to expect (high or low
> > side)
> > at given ambient temps.   Is there such a fact sheet or spec.?
> >
> > Thanks,
> >
> > Steven
> >
> >
>
> --
> Thanks,
> Ken Wilford
> John 3:16
> www.vanagain.com
> Phone: 856-327-4936
> Fax: 856-327-2242
>