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