So now that I've swapped all my old AC components, for a134 compatible- i.e hoses, compressor, accumulator, condenser, new orfice tube, O rings etc.. &
before I just start pouring cans of refrigerant in
- I'm seeking advice as to how much a134 freon & oil do I add?
Ford specs for the old R12 system = 52oz plus 7oz oil

 

I'm not sure what your experience and/or research has been with working on your Bronco's AC system, so sorry if you know all of this..but I'm curious if you have pulled a vacuum on the system and it held for a significant amount of time?

You should be able to add 7 ounces of oil to this system as well (make sure your compressor didn't come with oil in it). I used ester oil, which is good for R-12 to R-134 retrofit and compatible with both technically.

I'd start adding about 80% of what the R-12 capacity is, so if you are using the typical 12 oz cans, add 3 cans and then on your 4th can you will need to add just enough (possibly 1/2 a can or more) to get your vent temperature down. You will need to monitor vent temps and aim for around 40 degrees Fahrenheit or below. Monitor high side pressure if you can, while filling, etc.

Just don't expect awesome temperatures all the time, because the conversion has limitations, but still a million times better than no AC.

 

Thanks for capacity figures!
I'm still chasing a leak now I'm thinking it's caused by crappy parts /everco& four seasons
-I'm thinking ill just pull it all & return em & put a bypass pulley in - Im only here in lower 48 another few weeks before I go back home to Alaska!
Thanks again