cruznlife1
+1y
So your truck is originally R-12 ? Did you buy a conversion kit ? for 134a ?
Probably an interdynamics kit
I've used the retro kits, I HATE THEM.... If you are originally r-12 you can keep the system the way it is. R-12 is outlawed and if you can get your hands on it it's extremely expensive. What you want is something called "Freeze 12" it's an alternative that you just add till it's full. If you do want to use what you got, and you seriously wanted reliable cold air, I'd replace the accumulator, orifice tube, all the o-rings and flush the condensor, lines, and evaporator. Drain the compressor. Refill the compressor with the appropriate amount of pag 46.... Evacuate that system deep, for at least an hour, than with some gauges fill it with 134a. Should honestly cost no more than 100 bucks for the new parts, flush, o rings, and some freon. It would be the proper way to do it and be cold. If you were closer I'd do it for you at the cost of parts only. I'll be at slamfest, are you going ? I could step you through it.
If you are deadset on using what you got, than releive the r-12 vent it to mother atmosphere, she'll love that. The government will hide your body though. Anyways vent that, than turn the a/c on, the low pressure switch will keep the compressor off till theres pressure. Add the can of oil and stop leak, by this time the compressor may be kicking on and off. Add 2 cans of freon (these systems only hold like 20oz I think it was.) 2 cans, if the compressor stays on without cycling thats it. If you have gauges than even better fill it till it's full. But if it's not cycling it's full enough. If you put in too much your going to pop your high pressure release.