a/c high pressure switch | FerrariChat

a/c high pressure switch

Discussion in '365 GT4 2+2/400/412' started by dstacy, Sep 10, 2007.

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  1. dstacy

    dstacy F1 World Champ
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    Anybody know a crossover part #?
     
  2. blkprlz

    blkprlz Formula 3

    Mar 24, 2007
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    Dave, I don't know much at all @ Ferrari A/C but I have read with older Italian cars (Maserati in particular) that York made the compressors (of commercial grade), maybe the engineers can point you in the right direction......
    http://www.yorkupg.com/engineers
     
  3. dstacy

    dstacy F1 World Champ
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    #3 dstacy, Sep 10, 2007
    Last edited by a moderator: Sep 7, 2017
    The high and low pressure a/c switches are not sold as seperate pieces. Take a look at the attached from the parts book it is item #3.
    The part number for the dryer and both high & low pressure switches is #114730. NLA of course. The suggested superseeded parts are a 129101 and a 129102. 129101 is the dryer with ONE switch on it. 129102 is the part number for the other switch. Picture of the suggested replacement attached.
    $168 & $78 from our friends at Ricambi. Shipping Wednesday next day air. I'll let you all know how the installation goes.

    FYI, no I am not going to convert to R134. R12 for me as long as you can still buy it.
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  4. 400iGuy

    400iGuy Formula 3
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    Great info to have. I'm with you, R12 forever! Got a 30lb tank to keep my 400iA and Hot Rod going for a long time.

    Al
     
  5. dstacy

    dstacy F1 World Champ
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    Drier with the single switch showed up today. Interesting; the switch has the following markings on it:

    LH -654-694
    H/P 25kg
    L/P 2kg

    It looks like Ferrari superseeded the 2 switch model to a one switch model. I'll install it tomorrow and let you know how it goes.
     
  6. dstacy

    dstacy F1 World Champ
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    #6 dstacy, Sep 15, 2007
    Last edited by a moderator: Sep 7, 2017
    Installed the new drier with the single switch this morning. It took a couple of hours but I could have done it a lot faster if I hadn't taken a couple of breaks to play around with my grandkids.

    For those of you needing to do this in the furure here is the step by step:

    1) evac and recover the freon (if you haven't already done severe damage to the atmosphere by venting it into the air :) )
    2) disconnect the 2 a/c hoses that connect to the compressor and fold them back out of the way (you don't have to do this but since you don't have any freon in the system, moving these hoses out of the way gives you a lot more room to work)
    3) unplug the electrical connector from the drier to the wire harness
    4) disconnect the 2 hoses connected to the drier.
    5) (Here is the toughest part of the whole job) Loosen the bolt on the clamp that holds the drier in place. You have to remove the bolt all the way so the clamp opens wide enough for the drier to slide up and out of the car. Getting a wrench on both the bolt and the nut is a pain in the a$$
    6) slide new drier into clamp, but don't tighten yet.
    7) attach hoses to new drier and finger tighten BOTH
    8) tighten clamp
    9) wrench tighten hoses to drier
    10) plug in electrical connector
    11) re-connect hoses to compressor
    12) R12 fill and away you go

    Here are the 2 driers side by side. Please note that I've already removed the high pressure switch on the old one, but you can see where it went. Looks like the old high & low pressure switches were wired in series. The short wire in the picture connected to the missing high pressure switch. The other wire out of the high pressure switch went into the connector in the lower left of the picture.
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  7. synchro

    synchro F1 Veteran

    Feb 14, 2005
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