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I have no idea how to do this. Go take some pictures and submit
an article yourself!
From what I "hear" some can get a shop to do it from
$100 to $1,500, thus there is no reliable information. Kits
aren't expensive, I suppose it's the know how.
someone said these instructions:
If you choose to convert, do at least these:
1. Evacuate R-12 (not releasing to air. You need to find certified
facility to do this).
2. Apply vacuum to system for >30 minutes to completely
remove everything. This is for insurance. Not all shops are
willing to do this.
3. Fix any problem the system has. A paradox is many problems
can only be detected when the system is fully charged.
4. Replace dryer, pressure switch on dryer, expansion valve.
Make sure
the pressure switch is for R-134a. R-134a operates better in
higher
pressure. If the switch is not correct, it will cut off the
compressor
clutch earlier, then it will not be as cold as using R-12.
5. When doing work above, do replace every O-ring encountered.
Old
O-rings are compatible, but they do age. Replacing them now
is much cheaper
than later. You may want to replace the valves on the low and
high side
ports. Same reason.
6. Fill with R-134a with ester (or PAG) oil. R-12 uses mineral
oil which does not work well in R-134a.
7. Place a sticker (I think they are color coded. R-134a should
be light
blue) indicating the conversion. This is important for future
maintenance.
A repair facility has no way to figure out what refrigerant
is inside (and
how much). Incorrect or missing label may cause contamination
in their
equipment.
--
I don't like directions like that, no pictures, no "how
to"
More Coming Soon! (As soon as I figure out how
to do this or write up what I already have)
If you can provide some
good pictures and/or how to DIY, submit!
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