a/c conversion
Thread Starter
Instructor
Joined: Aug 2000
Posts: 111
Likes: 0
From: Tulsa, OK 74132
a/c conversion
where would i get an a/c conversion from r-12 to the 134 for a 78 SA L-48
the a/c is working fine now but for in the futrue I can't afford 50$ a pound for freon
Thanks
the a/c is working fine now but for in the futrue I can't afford 50$ a pound for freon
Thanks
Drifting
Joined: Mar 2000
Posts: 1,370
Likes: 0
From: Southwest Ranches FL
Re: a/c conversion (davds96)
Just vacuum it down, replace the receiver-drier, vacuum it again, replace the freon with R-134 and some new oil. Charge to about 80-90% of what R-12 amount fills it. DON'T try to stop the bubbles in the sight glass. It'll work fine. :D
Drifting
Joined: Sep 1999
Posts: 1,908
Likes: 0
From: Manassas, VA, USA
Re: a/c conversion (davds96)
If you're asking about having someone else do this, any competent A/C shop can do the conversion. They are very common these days, with prices going up on R12.
If you're asking where you can get a conversion kit, there's the minimal approach and the max approach (replace almost everything). The min approach is to replace all the o-rings, replace the receiver dryer, and refill with R-134a to 80% of R-12 capacity. With the min approach, expect some leakage of R-134a because R-12 systems didn't use "barrier" hoses. But at $6 a can, recharging your system every couple of years is no big deal.
If you're asking where you can get a conversion kit, there's the minimal approach and the max approach (replace almost everything). The min approach is to replace all the o-rings, replace the receiver dryer, and refill with R-134a to 80% of R-12 capacity. With the min approach, expect some leakage of R-134a because R-12 systems didn't use "barrier" hoses. But at $6 a can, recharging your system every couple of years is no big deal.
Burning Brakes
Joined: Dec 2000
Posts: 1,183
Likes: 2
From: Des Moines Iowa
Re: a/c conversion (davds96)
Suggest you do a search on A/C, lots of information in this forum in the past on R-134a conversions. Would suggest you also replace oriface tube with the 'adjustable VOV(I believe) one you can purchase from NAPA for around $25, in addition to new receiver/dryer and 0-Rings. Also suggest you use one 4 0z. can of 'Maxi Cool' in addition to the R-134a, and further suggest proper charge of 134a is more like 70% of what you'd use if installing R-12.
Don't worry about the 'barrier hose' thing, studies done have indicated that systems which previously had R-12 in them, don't leak after conversion to 134a, because there is enough R-12 oil left in the hoses to keep them sealed or something like that.
Don't worry about the 'barrier hose' thing, studies done have indicated that systems which previously had R-12 in them, don't leak after conversion to 134a, because there is enough R-12 oil left in the hoses to keep them sealed or something like that.
