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  1. #1
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    Dec 2008
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    Default My 1-wire alternator experience

    After my alternator died on my Jinma 284 I started doing some research. I found a thread here about converting to a delco 10si or 12si. It sounded good to me so I bought 3 wire 10si. The thread discussed the differences between 3 and 1 wire. And a few people said the one wire would excite right away at idle...no problem. So to simplify the wiring I converted the 3 wire to a one wire. The install was pretty straight forward. For the record, my one wire did not excite until I hit 1800 RPM or so. Once I did it was fine at idle but did not excite until I hit 1800 RPM. So basically I think the 3 wire would be better on a tractor. I wish I would have listened to Soundguy.

    Other install notes on my Jinma: I had to grind a bit on the alternator pivot since it was too tight. I am able to use the same belt. I made a mock-up bracket from a piece of straight aluminum I had laying around. I used 10 gauge wire. The 10si is 63 amp.


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  2. #2
    Super Member flusher's Avatar
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    Jun 2005
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    Sacramento
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    Getting old. Sold the ranch. Sold the tractors. Moved back to the city.

    Default Re: My 1-wire alternator experience

    Quote Originally Posted by Trisor63 View Post
    After my alternator died on my Jinma 284 I started doing some research. I found a thread here about converting to a delco 10si or 12si. It sounded good to me so I bought 3 wire 10si. The thread discussed the differences between 3 and 1 wire. And a few people said the one wire would excite right away at idle...no problem. So to simplify the wiring I converted the 3 wire to a one wire. The install was pretty straight forward. For the record, my one wire did not excite until I hit 1800 RPM or so. Once I did it was fine at idle but did not excite until I hit 1800 RPM. So basically I think the 3 wire would be better on a tractor. I wish I would have listened to Soundguy.

    Other install notes on my Jinma: I had to grind a bit on the alternator pivot since it was too tight. I am able to use the same belt. I made a mock-up bracket from a piece of straight aluminum I had laying around. I used 10 gauge wire. The 10si is 63 amp.




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    That's about the rpm needed. My 1964 MF-135 diesel has a 1-wire Delco alternator that needs around 1700 rpm to excite the thing. It charges the battery which is all I ask.

  3. #3
    Super Member Farmwithjunk's Avatar
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    Aug 2005
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    7,514
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    Mt Washington, Kentucky
    Tractor
    Where do I begin.....

    Default Re: My 1-wire alternator experience

    Take your 1-wire alternator to a GOOD auto electric shop and ask to have it set up for a lower RPM "cut out". I've got one that's a spare I use on various tractors when I'm working on a generator/alternator issue. It excites at approx. 800 rpm.
    There are three kinds of men;
    1.) The ones that learn by reading
    2.) The few who learn by observation
    3.) The rest of them have to pee on the electric fence for themselves.

  4. #4
    Super Member
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    Sep 2000
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    6,595

    Default Re: My 1-wire alternator experience

    I had a 1 wire that wouldn't excite until 2000 or so. Just pulled the black cap, found there was a spot for the extra wires so it's now a 3 wire exciting from idle.

    jb

  5. #5
    New Member
    Join Date
    Oct 2013
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    2
    Location
    Deer Park washington
    Tractor
    Jinma 284

    Default Re: My 1-wire alternator experience

    There is an additional post on the delco 10 alternator which I am told is the connection for the rpm's on the Jinma 284.. I am modifying the tension arm so the delco alternator will fit and will let you know about the rpm connection. Frustrating to say the least. you have to un-install the radiator to remove the alternator!!

  6. #6
    Gold Member
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    Aug 2009
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    341
    Location
    loganville ga
    Tractor
    wheel horse c-100

    Default Re: My 1-wire alternator experience

    as i have posted here before high speed cut on has nothing to do with tractor make it has to do with air gap between the rotor and stator have seen rebuilds that would not at all but could excite reg and it would work to low rpms came back.
    call your local rebuilder if you have one ask for wai/transpo part d10ac it is a medium task to install but can be done if they cant supply let me know have in stock with shipping about $10.00 this will allow regulator to kick in about 500rpm.
    also not unusal to see new china built unit not working because they dont understand air gap either if you buy part get instruction sheet

  7. #7
    Gold Member
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    Jul 2006
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    275
    Location
    Pittsburgh, Pa
    Tractor
    Ford 1900 - Steiner 420 - Black Craftsman Pro 24hp - Simplicity ZT-2500

    Default Re: My 1-wire alternator experience

    I put a 3 wire on a 2420 FarmPro a few years back. It's been working good. One thing you do need to do is to blow the dirt out of the alternator. It gets pretty dirty in there I found.

    Steve
    http://www.tractorbynet.com/forums/c...tml#post985528

  8. #8
    Platinum Member bandaidmd's Avatar
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    Jun 2013
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    DelMarVa
    Tractor
    kubota b2620,b8200

    Default Re: My 1-wire alternator experience

    from the picture in post 1 that looks to be quite a large pulley on that alt. It could be that the alternator is turning slower than its designed due to the pulley ratios being off, a smaller pulley might be whats needed. My local auto elec shop has different pulleys in stock.

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