How Much PAG?

[95OBSMan]

1995 GMC RCSB 5.7 TBI

1- Yes I did read the service manual for my truck(listed above left)
2- Upon reading the service manual pertaining to the replacement of A/C compressor and it components, i.e. dryer/accumulator, condenser, and evaporator.

1- Manual says 8oz of PAG oil in a/c compressor, further reading says to drain all fluid from NEW compressor, drain fluid from old compressor and notice that amount and refill NEW compressor with that exact amount.
2- No where does it mention adding any to dryer/accumulator, condenser, or the evaporator.

I have bought a NEW compressor, tag on back states prefilled with 3.0oz of fluid, does not state to empty or add to it, (NAPA Professional Series) which is a 4 seasons, no other instruction other than to turn shaft 10 turns as to lubricant the internals of compressor.
I bought the new Air conditioner Kit containing dryer/accumulator, O-ring kit, PAG oil 8oz bottle, and 1 orifice tube. 1 new a/c line kit that goes to the a/c compressor, 1 new A/C liquid line goes from inlet of evaporator to condenser. All parts for this where bought from NAPA and as of this post are correct and seem to "dry fit" very well.

Yes I could find some videos for this but I have a lot of $$ into these parts and I don't want to screw this up, this is the place to find assistance and help with this install, also when I removed the old compressor not one drop of PAG came out of it, I got about 2oz out of the original dryer, about 1.5oz from the condenser and when I flush the evaporator I did see signs of PAG oil but I don't know that amount as it was mixed with the A/C flush fluid.

I just need some help so I can get her back up and going.
Heres some pics at the point I'm at. Thank you for any advice and or suggestions, it will be greatly appreciated!

 

[jd33173]

Went through this recently. Was your compressor leaking or did it discombobulate itself? If the latter, one of the critical things is to clean up the system as much as possible. I see that you have all the goodies ready so make sure to blow out the evaporator and make sure to get as much crap out the remaining system as possible. Get the old accumulator and launch that sucker into orbit as you dont want the old one (where compressor shavings go to die) anywhere near your old system or you shall be doomed to change out the expansion valve doohicky multiple times and get to rinse lather and repeat as I was doomed to do (since my dad did not share critical information on the subject w me before we started fixifying it). I did fill my 4 seasons compressor with an additional 5oz of pag as it came with three and the spec said 8. Another key takeaway is to establish a solid vacum on the system and ensure that it holds for a good bit of time (at least 30 mins - more being better) to give you a good chance of not wasting freon (which are not cheap). Loose / bad schrader valve bit me as well as old rear compressor seals which I noticed you already have. Another amusing thing that happened to me was breaking off the evap tube to the adapter as mine was frozen. The good/bad part of that was that i then had to pull the dash (swapped it with a replacement from LoveMyCash), pull out the evap box and replace the evaporator which was completely full of crap. Putting some UV dye in there is probably a good idea as that is i how I discovered the junkyard pick my Dad SWORE was in great shape was leaking freon like it was going out of style. Many hard lessons learned but at least I got to spend some time fixing it w my Dad. He is a frickin riot.

 

[95OBSMan]

Thanks jd33173, the compressor leaked from the bottom between the metal case and the aluminum body, thats why I had no PAG left in it when I removed it. I flushed the evaporator twice with the good stuff and pulled a vacuum test on it, held all night.

Went with a new compressor and accumulator, lines and condenser, I'm glad so far that I don't have to pull the evaporator out, by the looks of it thats a freakn chore, glad that you got to spend that time with your Dad, my Dad was a riot too!! Lost him 3yrs ago, but I could hear him saying if you're gonna get into it this far do it right!

Heres some pics as of the days end...