Glad its working but again here is the charging procedure.
I have tested a lot on these trucks for R12 replacements.
I have used the following in these trucks.
R134A works but there are cons.
- higher head pressure
- smaller in molecule size so it will tend to leak over time out of the front of your compressor seal.
- inefficient in a system designed to use R12 (condenser size).
- temp creep up at stop lights or idle due to inefficiency.
- significant more drag on the engine.
I have found that the sweet spot for our trucks is about 8.5 to 9 oz of Duracool.
Since you are using a lot LESS its critical to get the oz correct or you will either freeze up the evaporator or it wont cool enough.
Sometimes I would use a small kitchen scale and take the can off and weight it during charges.
Don't forget to let the system suck out what's in the lines into your system so that you don't lose up to two oz in the manifold and pressure/charging lines.
To prevent refrigerant loss, this is what you need to do:
1.) Shut off car (safety)
2.) block the center port on manifold with a cap.
3.) CLOSE the valve on car end of high side. Disconnect from car.
4.) Start the car and A/C.
5.) Open both high and low valve on the manifold. This will flush the refrigerant trapped in high side hose back into the system and since the low side is the coldest part of the entire loop, liquid refrigerant will not become trapped in service hoses.
6.) Turn off the vehicle, quickly shut off the car side valve and remove the low side connection. You will lose approximately 120cm3 of gaseous refrigerant at 50 psi or so from the system which amounts to 0.1 to 0.2oz by weight, which is negligible.
DURACOOL CHARGING PROCEDURE
https://www.duracool.com/frequently-asked-questions/
