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ac vacuum pump question

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Old Jan 22, 2012 | 09:49 PM
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ac vacuum pump question

I have the ac on my superduty that needs system evacuated and recharged. What are your thoughts and opinions on the vacuum pumps that connect to a aircompressor? It would be for my ocassioal use. Thanks.
 
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Old Jan 23, 2012 | 12:48 AM
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Robinair Air Vacuum Pump For R12 And R134 | Wayfair

I have used one like this a few times. It did fine.
 
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Old Jan 23, 2012 | 06:51 AM
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The air compressor operated units generally can't pull a deep enough vacuum.
 
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Old Jan 23, 2012 | 08:40 PM
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The robinair one would go to 30 in hg. I was skeptical when I first tried it so I asked to try it while the tool truck was still there
 
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Old Jan 23, 2012 | 09:15 PM
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All depends how good compressor/tank you have. They sure take lot of air fast.
HF is having those for about $20.
Now for AC service it is advisable you take it to a shop that will recycle the refrigerant instead of dumping it into atmosphere.
Why do you need to discharge system holding the pressure anyway?
 
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