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Unread 08-04-2010, 04:46 PM   #1
Dead_End
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filling A/C from empty

I need to recharge my A/C system after an O ring crapped out. How much r-134a do I need and is there anything special I need to do when filing it up?

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Unread 08-04-2010, 04:58 PM   #2
tjthorson
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Quote:
Originally Posted by BNSF2228 View Post
I need to recharge my A/C system after an O ring crapped out. How much r-134a do I need and is there anything special I need to do when filing it up?
Several cans. But - you NEED to pull a vacuum on that system before you charge it. Leaving even that small amount of atmosphere air in there can creat too high of a head pressure and prematurely wear out the system. You will want gauges and add enough refridgerant to get about a 35 -38 degree coil (low pressure side, blue gauge).

Do it right - or you will do it over, and next time be replacing the compressor and maybe more....
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Unread 08-04-2010, 09:59 PM   #3
Dead_End
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Thanks. I kinda figured there would be something special I would have to do other that hook up a can. After a little more research I see what you're talking about.
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Unread 08-04-2010, 10:14 PM   #4
mikevsgeek
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It's also recommended that the orifice tube and accumulator be replaced when the system has been opened to the atmosphere
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Unread 08-04-2010, 10:52 PM   #5
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24 oz of refrigeriant.
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