Farm Equipment - 10SI one wire alternator

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10SI one wire alternator

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Category: Allis Chalmers
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=44635
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Topic: 10SI one wire alternator

Posted By: fixer1958
Subject: 10SI one wire alternator
Date Posted: 29 Jan 2012 at 6:57am

I have a friends Ford 2N that he wants me to do a 12 volt neg ground conversion on.

While prowling around on the internet I found a guy that sells a 12 volt "positive ground"

kit or a 6 volt positive ground for a GM 10si alternator for $39.95.

I have an old 10si laying around.

Anyone every done this? I never heard of it done before.

http://www.alternatorparts.com/10si-all-in-one.html" rel="nofollow - http://www.alternatorparts.com/10si-all-in-one.html

Look towards the bottom of the page.

Apparently it's all in the rectifier and the jumper wire.

Replies:

Posted By: scott
Date Posted: 29 Jan 2012 at 8:09am

I used a two wire 10SI and a Ford solenoid. The correct solenoid has two small studs, one to activate the solenoid and one that sends a shot of electricity to the alternator to turn it on. I didn't want the alternator to be "hot" all the time.

Posted By: steve(ill)
Date Posted: 29 Jan 2012 at 8:13am

yes there are positive ground alternators, but not common. The biggerst question is "why"? If your converting, make is negative just like every other vehicle in the world. I also beleive the three wire alternators are much more common and reliable than the 1 wire. Its not that complicated to install 3 wires.

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Like them all, but love the "B"s.

Posted By: DaveKamp
Date Posted: 29 Jan 2012 at 11:03am

Biggest concern would be changing everything out to reverse-polarity lightbulbs and flipping the ignition coil upside down so the electrons don't fall out. :-}

Really- the best way to do this, is to yank the 6volt battery, plop in a 12v, install a red wire from the starter switch to the battery post, a black wire to ground, and connect the stock and ordinary 10SI's output lug to the positive battery post... then yank all the 6v lamps and 6v coil, install 12v lamps and coil, and go for a cruise.

The advantage to using a 3-wire, is that the alternator will self-excite at idle. Without it (in just one-wire mode) you'll need to bring the engine RPM up in order for the alternator to excite.

Posted By: fixer1958
Date Posted: 29 Jan 2012 at 11:46am

I have changed the WD's I have had to 12 neg ground. I know it's not that big an issue.

I just wondered if anyone has done it.

I have always been partial to a one wire alternator. My choice.

The first one I ever used I had to hit the throttle pretty hard to get it to excite. I bought the regulator seperate and put it in the alternator.

This last one I got from Napa I just have to start it and it kicks in. No high RPM's.

Posted By: 79fordblake
Date Posted: 29 Jan 2012 at 2:17pm

I use to run a 3 wire alternator but recently switched to a 1 wire when the 3 wire died. I installed a slightly smaller pulley on the 1 wire and it will start charging as soon as I start the tractor without reving it up.

This alternator charges just as good as my other tractor that still has a 3 wire.

Posted By: fixer1958
Date Posted: 29 Jan 2012 at 3:39pm

I still use the OE pulley off the generator that was on it.

It fit well enough and was for a 5/8 belt only the diameter was bigger by a little.

It works and I'm happy and never lets me down. That's all I care enough about.

The only thing I changed was I had to take the fan off the alternator when I put power steering on it for belt clearance.

I don't work the alternator hard enough to make any difference anyhow.