Re: a/c recharge with r-12
[Re: 69fish]
#84206
07/05/08 12:56 AM
07/05/08 12:56 AM
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Joined: Jan 2003
Posts: 1,996
s. e. pa.
calrobb2000
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,996
s. e. pa.
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hi you first need to vacuum the system to remove all moisture ,dont skip this step if you want it to work properly ! gage psi should be app 40 low side 240 high side at 80* air temp . low psi is the larger hose size ! 
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Re: a/c recharge with r-12
[Re: calrobb2000]
#84207
07/05/08 02:13 AM
07/05/08 02:13 AM
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Anonymous
Unregistered
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Anonymous
Unregistered
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I'm going to be brutally blunt, here. I spent about 15 years servicing low, med, and high temp AC and refer units.
You should SERIOUSLY consider hiring someone who knows what they are doing. Refrigerant is nothing to play with. It can seriously injure you, and mistakes in charging--like slugging the compressor with liquid--can turn it into instant junk. Undercharging can be as bad as overcharging, and especially if there is some problem in the system, novices tend to "add more" to see if it will cool.
Once again, a good way to scatter a compressor
240, by the way, is pretty high for a target head pressure with R12. My old Ranger still uses R12, and as i remember, it runs around 180.
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Re: a/c recharge with r-12
[Re: 69fish]
#84209
07/05/08 04:25 PM
07/05/08 04:25 PM
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Joined: Jan 2003
Posts: 25,746
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,746
Rio Linda, CA
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The rear connection on the compressor is the low side, follow the line entering the rear until you find a charge fitting.
Gauge readings are dependent on outside air temperature.
The INTERNET, the MISinformation superhighway
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Re: a/c recharge with r-12
#84210
07/06/08 01:03 AM
07/06/08 01:03 AM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
I'm going to be brutally blunt, here. I spent about 15 years servicing low, med, and high temp AC and refer units.
You should SERIOUSLY consider hiring someone who knows what they are doing. Refrigerant is nothing to play with. It can seriously injure you, and mistakes in charging--like slugging the compressor with liquid--can turn it into instant junk. Undercharging can be as bad as overcharging, and especially if there is some problem in the system, novices tend to "add more" to see if it will cool.
Once again, a good way to scatter a compressor
240, by the way, is pretty high for a target head pressure with R12. My old Ranger still uses R12, and as i remember, it runs around 180.
Dangerous stuff if done wrong. I had an experienced instructor who was missing 3 fingers from a can explosion. Inattention caused him to hook up to the high side and that overpressurized the can. Get help if you dont know what youre doing.
Pete
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Re: a/c recharge with r-12
[Re: 69fish]
#84212
07/06/08 02:38 AM
07/06/08 02:38 AM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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you can do it. Just be cautious,patience & ask for help when needed.
live every 24 hour block of time like it's your last day on earth
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Re: a/c recharge with r-12
[Re: 69fish]
#84216
07/06/08 03:07 PM
07/06/08 03:07 PM
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Joined: May 2008
Posts: 42
S Williamsport
therick
member
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member
Joined: May 2008
Posts: 42
S Williamsport
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Quote:
Some basic questions. I have access to some guages and large container of freon r-12. I'm guessing that you put the freon in on the low pressure side-if this is correct where is the low pressure side fitting and what is the max pressure you should see on the guages when the system is full? Does anyone have a picture of the low vs. high presure fittings? This is for 67 dart with original factory air. Thanks for any and all help. 
I'm thinking. If you have to ask these questions. Then you don't have the experience to do this safely.
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