I need to recharge my R-12 system, and I have several cans of John Deere R-12 lubricant that are 50% lubricant, 50% freon. If I added one of these cans, I realize there would be slight performance loss from the lower refrigerant/oil ratio, but would there be any other problems?

The specs for the system are 2.4 lbs R-12 and 8 oz. oil.

y not convert it over to r134a????

We discussed this in my thread about freeze 12. I don't have a fast leak, and i don't want to replace my receiver-drier, and i don't want to run the high pressure 134a in my compressor that might shorten its life. I DO have several cans of 50% freon laying around on a shelf which will never be used because all of our tractors have been converted.

i know this is off topic but tractors have AC but thats understandable then if u want to stick with R12

Kenn... if you've ever talked to JDB...it'* thousands of acres and to be in a monster of a tractor...tires bigger than our cars would be understandable to have AC

Now back to our regularly scheduled topic hehe....This is a specific question aimed towards someone that knows a lot more about air conditioning systems than me.

i dont see why it would affect it i know you have an r-12 system but most of R-134a system have a certain percentage mix

BTW be ready to convert after that stuff runs out
and as far as converting your ac system has to hold a Vaccum for a certain amount of time
it would be smart to instal UV dye in the system to find leaks in the future

and as far as wear and tear on your compressor if converting to R-134a i honestly think your looking way to deep into the issue tens of thousands of Pre 93 cars and truck have been converted to the R-134a system without any problems
as far as i know the retroit fit kit comes with different fttings that screw right on to your exiting lines and a different amount of freon is put in
your call but you Will have to convert sooner or later

Whats the total volume calculation of a normally-charged system, and how far would the 50/50 mix throw you off? I'd do that math and see. It probably wouldn't be by much, and might be worth the try. I'd be more concerned with a weaker mix.

Worst case, you might have to go with 134 later.

I believe the normal system say my 97... total charge should be 2.0 lbs of freon. with about 8 oz of oil.

50/50 will probably work ...might not be as cold.????

Has anyone used the "DuraCool" or HC-12a refrigerant replacement for R12? Seems like a reasonable alternative to converting to 134a. I had read, in the past that the government wouldn't allow it to be used in vehicles in the US due to its flammability. The posting in the legal section of the page seems to indicate differently. Here'* the link:

http://duracoolky.com/