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Single Wire Alternator Part Number

Discussion in 'Flat Fender Tech' started by masscj2a, Jun 2, 2019.

  1. Jun 2, 2019
    masscj2a

    masscj2a Member Sponsor 2019 Sponsor

    Chester Mass
    Joined:
    Dec 27, 2013
    Messages:
    393
    Has anyone done the single wire alternator conversion on a six volt system, turning it into a 12 volt system and remember the alternator part number ? Looking for at least 63 amp but maybe 100-105 amp. Could be a two wire as well. Parts guys look at me like I'm nuts when I ask them. Thanks
     
    Last edited: Jun 3, 2019
  2. Jun 2, 2019
    Rich M.

    Rich M. Shoe pusher

    Maryland
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    Mar 23, 2008
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    521
  3. Jun 2, 2019
    elawson

    elawson New Member

    Joined:
    Nov 23, 2009
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    Try asking about Lester Part number 7127-12 or 7127-3. This is a Delco 10si 63 amp alternator.

    Or, the Lester Part number 7294-12 or 7294-3. This is a Delco 12si 94 amp alternator.

    If the parts folks don't know about Lester numbers, quickly run away and go find an alternator rebuild shop.


    The -12 and -3 indicate the "clocking" of the alternator. If you put the threaded mounting hole straight up and the pulley side facing away from you so you are looking at the back of the alternator, the -12 one will have the 2 spade terminals straight up, while the -3 one will have those terminals at 3 o'clock. You can get a -6 or a -9 as well, but those won't do well on a 4F or 4L 134 engine.

    Bring the drive belt with you when you get the alternator so the correct pulley can be installed.



    Willys Works in Tucson, AZ (telephone 520-888-5082) had a really neat bracket set to mount the 10si alternator to the 4F and 4L 134 engines. They also had the wide belt pulley as well and it wouldn't surprise me if they also had alternators on the shelf.


    The bracket made things so easy that I'd be very disappointed if they no longer made it.
     
    ITLKSEZ likes this.
  4. Jun 2, 2019
    timgr

    timgr Jeepin' Nerd Sponsor 2019 Sponsor

    Medford Mass USA
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    Aug 10, 2003
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    19,801
    If you have a 12V 10SI on hand, adding that 6V regulator that Rich pointed to would be very easy. That's likely the cheapest route. These alternators are completely modular and easy to take apart and put together. All you need is a toothpick to hold the brushes back, and you can break down, assemble and clock to any position that you want.
     
    masscj2a likes this.
  5. Jun 2, 2019
    masscj2a

    masscj2a Member Sponsor 2019 Sponsor

    Chester Mass
    Joined:
    Dec 27, 2013
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    393
    I have to ad what I'm attempting to do, sorry. I want to convert from 6 to 12 volt system. My bad for not mentioning that earlier. So I am looking for the 12 volt alternator part numbers.

    That Willys Works site is interesting. May give them a call, but I was looking to get this done this week, prior to traveling to Kempton for the picnic there.


    Thanks guys. timgr, I still have an old 6 volt system and I'm converting the whole Jeep. I'm also going to install am M8000 Warn up front. The Jeep still has it's original wiring, unmolested.
     
    Last edited: Jun 3, 2019
  6. Jun 3, 2019
    elawson

    elawson New Member

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    masscj2a likes this.
  7. Jun 4, 2019
    jeeper50

    jeeper50 jeeps 'till I die

    Gawja
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    Dec 20, 2007
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    Last edited: Jun 4, 2019
    masscj2a likes this.
  8. Jun 5, 2019
    masscj2a

    masscj2a Member Sponsor 2019 Sponsor

    Chester Mass
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    Dec 27, 2013
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    393
    Thanks guys. jeeper50, I am heading out to the barn right now to build that bracket. I guess that was my missing link. Well that and no parts store around here carries a 5/8 pulley for my Delco 94 amp alternator. What the fudge. We use to be able to walk in and buy em for like 5 bucks. I must be getting old. :rofl:elawson, I ended up using your numbers and bought the 94 amp.
     
  9. Jun 5, 2019
    jeeper50

    jeeper50 jeeps 'till I die

    Gawja
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    Dec 20, 2007
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    452
    Call your nearby alt/generator repair shop they usually have some.
     
  10. Jun 6, 2019
    elawson

    elawson New Member

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    Nov 23, 2009
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    Is it set up for 1 wire operation?

    I'd not, hook up the charge warning lamp circuit and use a #53 bulb.
     
  11. Jun 9, 2019
    sgogpn

    sgogpn Member Sponsor 2019 Sponsor

    Glendale, AZ.
    Joined:
    Nov 20, 2002
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    310
    Here's the Napa part# for the 1 wire alternator that I use...

    Napa 2134011SW 63 amp

    Hope this helps,

    Mike
     

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