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November 18, 2011
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bob16925
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| Lifetime Member | posts 2 | |
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I ran across an article a couple of years ago about an alternator mod that involved a single wire gm type alternator. I have the alternator and now I cant find the article lol. As I remember it was rather simple but their were pitfalls and I would prefer not burning up the tractor. Any help as always is appreciated.
Bob
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November 19, 2011
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Bob Rooks
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| Lifetime Member Platinum Elite | posts 868 | |
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Post edited 11:49 am – November 19, 2011 by Bob Rooks
I don't recall any pitfalls when I swapped mine, except that I had to put the lockwasher between the pulley and the fan as a spacer so I could use the OEM pulley, and use a couple of washers on the adjusting arm. I installed a Delco 12Si 72 amp alternator. Only extra thing I had to buy was the pigtail @ $2.50. Oh yeah, and a belt. Bought the segmented belt from Harbor Freight.
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November 24, 2011
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bob16925
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| Lifetime Member | posts 2 | |
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thanks Bob I found the short pulley to keep the charge rate up and will start the project this weekend
Regards Bob
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November 24, 2011
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Bob Rooks
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| Lifetime Member Platinum Elite | posts 868 | |
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bob16925 wrote:
"I found the short pulley to keep the charge rate up…"
Not sure what what you mean, but good luck. 
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November 24, 2011
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RichWaugh
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| Lifetime Member Elite | posts 280 | |
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I think he's referring to changing to a smaller diameter pulley on the alternator to increase alternator rpm. The 1-wire alternators typically don't begin to develop full charging voltage until the engine hits around 1400 rpm, due to the fact they're designed for gasoline engines in cars. On tractors they may not put out full voltage until the engine is around 1400-1600 rpm unless the pulley is changed. Of course, if you go small enough to make much of a difference then you have belt slip due to low contact patch…
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November 24, 2011
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Bob Rooks
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| Lifetime Member Platinum Elite | posts 868 | |
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Something must be wrong with mine then because it charges at idle – around 600 r/m. Oh well, I was just curious about the "short" pulley. Never heard of that. Short, for me anyway, usually refers to a distance (horizontal/vertical) measurement.
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November 24, 2011
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Tinbender
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| Lifetime Member Elite | posts 385 | |
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"Short" when in the same sentence as "alternator" makes me think of "Let the smoke out"
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