ac compressor failure

I have a 1996 4.0 manual ranger, when the ac is off it sounds fine, but when I turn my a.c. On it sounds like the pulley is making a ringing/rattling sound but only when the compressor kicks in, it’s not a constant sound and only does it for a couple seconds at a time. Also my a.c. Will not get...

I have a 1997 Mazda B-4000 SE 4.0L Xtr Cab 2WD only 96k Miles (same as a Ranger XLT 4.0L). Last couple of years I've had the AC slowly lose Refrigerant to the point I was only getting Cool Air, not Cold. I refilled it with "Johnsen's" brand 134a and had nice cold airflow again all summer, fall...