82 AC charging
Thread Starter
Drifting
Joined: Mar 1999
Posts: 1,432
Likes: 22
From: Oxford CT
82 AC charging
Hey guys...I got my hands on some R12 and want fresh-in up the charge on my wife's 82. It looks like there is 2 places to connect to on the low pressure side. One is right after the accumulator and the other is right at the compressor. I tried the easiest of the two which is after the accumulator but it wouldn't take the charge. The one at the compressor is impossable to get the hose on.
My questions are.. does it make a difference which fitting is used? If its the one at the compressor is there any hints or lessons learned on making the hose hook-up?
My questions are.. does it make a difference which fitting is used? If its the one at the compressor is there any hints or lessons learned on making the hose hook-up?
Safety Car
Joined: Jun 2004
Posts: 4,372
Likes: 223
From: Beecher Illinois
I use the fitting on the back of the compressor without any problem. My hose has a bend at the fitting that hooks up to the compressor fitting. If you add here you want to keep the can upright adding it as gas instead of liquid.
Did you make sure your hose has a pin in the end to depress the schrader valve when you hook it up?
I noticed sometimes when I hook mine up it seems to miss the schrader valve and I get no place. Unhook it and hook it back up usually does the trick.
Is your compressor running when you try to add the freon? If not you need to jump the pressure switch just along side the pass side fender edge.
Did you make sure your hose has a pin in the end to depress the schrader valve when you hook it up?
I noticed sometimes when I hook mine up it seems to miss the schrader valve and I get no place. Unhook it and hook it back up usually does the trick.
Is your compressor running when you try to add the freon? If not you need to jump the pressure switch just along side the pass side fender edge.
Drifting
Joined: Jun 2005
Posts: 1,523
Likes: 1
From: grand prairie texas
I like kapsSA also charge my 77 from the fitting at the back of the compressor. Does your 82 have the sight glass to view the refrigerant? As long as you cannot see any bubbles in that sight glass with the compressor engaged your system should be full.
Thread Starter
Drifting
Joined: Mar 1999
Posts: 1,432
Likes: 22
From: Oxford CT
The fitting on my hose is strait and prevents it from fitiing properly. I guess I will have to come up with a different hose which may be a problem for a old R12 system. What is the valve for after the accunulator for?
No sight glass that I can see.
No sight glass that I can see.
Last edited by Roadster71; Jul 17, 2010 at 05:05 PM.
Safety Car
Joined: Jun 2004
Posts: 4,372
Likes: 223
From: Beecher Illinois
The valve by the accumulator is the one the shop manual says to use.
I just find that one hard to get to.
You're not talking about the fitting right up along side the fender edge, are you?
I just find that one hard to get to.
You're not talking about the fitting right up along side the fender edge, are you?
Last edited by KapsSA; Jul 17, 2010 at 05:30 PM.
Melting Slicks
Joined: Feb 2007
Posts: 2,709
Likes: 269
From: S.E. MI
St. Jude Donor '15
The sight glass should be at the high pressure fitting along the fender.
I used to have to take the belt adjuster bolt out of the compressor
to get the r-12 hose on. I now have a 90 degree fitting for r-134.
I used to have to take the belt adjuster bolt out of the compressor
to get the r-12 hose on. I now have a 90 degree fitting for r-134.
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Thread Starter
Drifting
Joined: Mar 1999
Posts: 1,432
Likes: 22
From: Oxford CT
The system is not completly empty. The compressor is just cycling on and off which indicates the system might be low. I'll try it again, maybe I missed the pin on the valve like was previuosly suggested. 
