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Allis 7040 air conditioning system

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captaindana View Drop Down
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Joined: 14 Sep 2009
Location: Fort Plain, NY
Points: 2461
Post Options Post Options   Thanks (0) Thanks(0)   Quote captaindana Quote  Post ReplyReply Direct Link To This Post Topic: Allis 7040 air conditioning system
    Posted: 10 Aug 2023 at 8:05am
How many pounds of r134 does it call for? Thanks! Dana
Blue Skies and Tail Winds
                          Dana
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Alvin M View Drop Down
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Joined: 24 Jun 2018
Location: PA
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Alvin M Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2023 at 10:52am
on from new A6 3.8  Seltec Kit  3.25-3.4 New delco A6 3.25-3.50
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captaindana View Drop Down
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Joined: 14 Sep 2009
Location: Fort Plain, NY
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Post Options Post Options   Thanks (0) Thanks(0)   Quote captaindana Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2023 at 8:55am
Thank you!
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                          Dana
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tbran View Drop Down
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Joined: 14 Sep 2009
Location: Paris Tn
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tbran Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2023 at 9:24am
FROM OUR EXPERIENCE.. on older systems they are like mother in laws.. each a little different.  We always charge the older systems on a 90 degree day to no more than 225-250 on the high side and it should be less than 20 on the low side WITH THE SIDE SHEETS ON. Then it will be cold at the evaporator, the air flow will determine BTU cooling - Then at about 1500 RPM close the doors and turn the fan to low - watch the low pressure - it should go to 12-14 PSI and the thermostat should kick off the compressor.  Anything abnormal, there is an issue . 
When told "it's not the money,it's the principle", remember, it's always the money..
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captaindana View Drop Down
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Joined: 14 Sep 2009
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Post Options Post Options   Thanks (0) Thanks(0)   Quote captaindana Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2023 at 10:35am
Thank you Tim!
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                          Dana
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