Ken;
Just finished doing this on our 85. I went ahead and had all the lines
replaced. A local shop used most of all the old ends and crimped on new
rubber hose. Around $75.
 I had to go back in and lubricate the overhead fan . If yours is still
out put a few drops of oil on the shaft. Also the compressors oil filler
hole got stripped out rather easily so take it easy there. I was able to
retap it and put in a larger size, so far so good. 48 ounces of R134 in
it so far and it is working quite well. Just watch the peep hole for lack
of bubbles.
 The R134 goes in slow, I submerged the can in hot water to speed things
up. The readings on the gauges had me confused, I was getting outrageous
high pressures. I left the gauges hooked up and had my SO drive around so
I could get some actual readings. They were normal then. I guess the
radiator fan does not flow enough air.
Also I put in a new expansion valve, about $13.
Drive Safely & Good Luck
Ken Lewis<Kernersville,NC>

On Sun, 28 Jun 1998 22:55:04 EDT KENWILFY@AOL.COM writes:
>I am doing the r-12 to r-134a conversion on the A/C system in my '84
>GL
>Vanagon.  The thing I would like to know is how much refrigerant is
>required
>for the system?  I couldn't find a sticker anywhere and I don't have
>the
>manual so I came to the List for help.  I have heard that you only use
>85% of
>the amount of refrigerant with the new stuff so I need to know the
>amount of
>r-12 the system needs (I can do the math).
>I would like this in pounds or onces not in grams if possible.
>This is not a job for the faint hearted.  We removed and replaced all
>of the
>o-rings already as well as the dryer and it was alot more work than I
>thought.
>You have to take that overhead unit down to get to the fittings in
>there and
>that thing is a bear.  I think I am going to cut the drain lines from
>the
>overhead unit and just couple the lines back together externally
>instead of
>trying to plug the lines back into the pan (you have to do this while
>holding
>the unit up against the ceiling and there really isn't any room for
>your
>hands).
>I got the dryer from the local Napa store for $26 and the r-134a was
>only $3 a
>12 oz. can too!
>My buddy has the r-134a guage set with the new fittings (quick
>disconnect) and
>a nice new vacuum pump so we are doing this one as right as we can.
>I'll keep you posted.
>Ken Wilford
>John 3:16
>

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