Kinda OT, but my lurking has shown you to be a quite knowledgeable
refrigeration tech. I was just stuck with an AC compressor replacement
on a Ford (Tecumseh FS10, R12). Due to financial constraints, I was forced to
acquire a salvage-yard unit as a replacement. The replacement (paid $12
for the whole deal, clutch and all!) came from an R134a system; I was
unable to locate a unit from an R12 implementation. As I had
no desire to retrofit the vehicle (it still had a full charge), I
dismantled the replacement compressor, cleaned out the PAG (with brake
cleaner, no less...) and reassembled with ester.
As the replacement compressor was necessary due to a pulley bearing
seizure that mangled the nose casting (as opposed to an internal
failure), there was no metal or other debris introduced into the system.
Can I expect this (admittedly hack-job) fix to actually work when I have
it evac'd and recharged? The compressor appears on all counts to be
identical; I didn't even notice a pressure relief valve on the
compressor--I assume this must be located elsewhere in the system (?!) and
therefore not a concern with the unit replacement.
I've switched several vehicles to 134a, but always after a compressor
failure. I've never tried to switch using an existing compressor back to
R12, so any comments are much appreciated.
Thanks for your time,
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