If you haven't installed a new drier / filter and evacuated the system;
you need to do that. (most of the old oil will be in your drier and not
in your compressor (lowest point in your system for one and the filter
material holds oil).

If you've done those things you can safely add 3.5 to 5 ounces of r-134
oil.(if you haven't got a graduated beaker use a 1 oz. shot glass to
measure it out).
When you install your r134a refrigerant, the system should be under
vacuum from the evacuation process so with the engine off (not running
the compressor) let the system take the refrigerant. (Do not suck it in
with the compressor!!!!).

With all of the long hoses the system can take as much as 67 ounces of
r134a refrigerant.

Determine this by your high side head pressure and low side vacuum.

Initially you should stop at 48 oz and run the system with this until the
system has normalized. If your head pressure is low on the high side you
can add more.

Be advised that the best temperature to expect out of your center duct on
low blower after five minutes of operation may not be better than 47
degrees Fahrenheit. You're just not going to get the 43 deghrees that you
get with Freon.

Stan Wilder

On Sun, 26 Aug 2001 16:09:39 -0400 Vanagon Man <puzerewski@MSN.COM>
writes:
> Volks,
> I am in the process of firing up the a/c on my backup 81
> westy............it
> is the York type compressor, and I have drained out all the old
> refrigerant
> oil.  Now how much of the r-134 oil do I add?
>
> Anyone have the part numbers for the a/c belts?
>
>
> Adam P
> 81 westy (2 of them)
> 74 beetle
> 73 Transporter (new!!!!!!!) Total resto in progress
>
> Vanagon Partsmobiles

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