91 ford ranger a/c compressor replacement question?

Question

I have a 91 ford ranger with a 3.0l V-6 engine.

I changed the a/c line on the compressor,it broke and shot freon all over me (R-12)-- I changed the line,and cleaned all parts with denatured alcohol like I was told to do,I also replaced the drier,pressure switch and all "O" rings in the entire system,I bought a new compressor and shrater valve...Rented a vac.pump,pumped it down and recharged it with (R134 and ester 100 oil)----It blew 39 degree air from the vents for 2 days then the a/c compressor locked up and burnt the belt off..What did I do wrong here?I would like to attempt it again,but it is expensive trail and error,What should I do next attempt to have great a/c like I did before?

Answer 1

You used the wrong oil, Fs10 compressors designed for R-134a use PAG oil...Nothing else will work and will lock the compressor...