Is it safe take my truck's AC system out to find a leak?
I have a 1992 ford ranger 2wd 4.0L v6
Had it for 6 years now and it never had AC. Far as I know owner before me didn't have any AC. I've charged it before but it all leaks out in a unknown place in about an hour time. I have pushed the high and low pressure valve few times about 3 weeks ago. There isn't any pressure in the AC system. It has been a year since I tired refilling it.
I just want know is it safe to take my AC out of my truck and look at few of the parts that I can't see of it?
Not really looking fix it. More of just wanting know what was wrong with it all of these years
Side note:
The last time I gave it a try with refilling it bunch of white chunky stuff started fly out of the place I put the refrigerant in at. I have no ideal if the truck had been converted from R12 to R134. Only thing I have is something that screws on and off the place I put my refrigerant in at
Added (1). Have used that ultravolet light thing few times. I think that what that white chunky stuff was flying out