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DanNESD 
Silver Level
Joined: 22 Oct 2009
Location: Milbank, SD
Points: 182
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 Topic: wiring an alternator
Posted: 27 Sep 2010 at 9:36pm |
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What is is easiest way to wire in an alternator on a D17 diesel. I have a 10si delco. I want to try to tap it into the factory harness. What do I do with the wires on the old regulator. I want to do this without destroying the original harness so I could change it back if when I decide to restore the tractor.
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DSeries4
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Joined: 12 Sep 2009
Location: Ontario, Canada
Points: 7304
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Posted: 27 Sep 2010 at 9:46pm |
Don't bother with an alternator. Just get your generator rebuilt, no rewiring required.
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DanNESD
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Joined: 22 Oct 2009
Location: Milbank, SD
Points: 182
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Posted: 27 Sep 2010 at 9:55pm |
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I was going with the alternator because of cost. I put a new regulator on my gas D17 and it cost almost $100. I already have the alternator so it wouldn't cost anything to put it on other than time.
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powertech84
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Joined: 17 Oct 2009
Location: Wisconsin
Points: 461
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Posted: 27 Sep 2010 at 10:06pm |
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There's a few minor differences between alternators, but the basic delco alternator needs two and a half wires. The battery wire from the generator goes to the post on the alt, and also you need a wire from this post to the S (starter) terminal on the alt. Then take the field wire from the gen and route it to the R terminal on the alt. Usually this works. I think this is right, but it is mnf night so...
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DSeries4
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Joined: 12 Sep 2009
Location: Ontario, Canada
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Posted: 27 Sep 2010 at 10:09pm |
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I've had my generators rebuilt in the past for $100 each. I bought a new voltage regulator last week for my D14 cost $50 at the local auto electric shop. My D14 had a alternator with a cobbled up wiring harness. So I am putting on a new wiring harness and generator to make it original again.
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JoeO(CMO)
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Joined: 11 Sep 2009
Location: Cent Missouri
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Posted: 28 Sep 2010 at 5:53am |
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Let me think,,,,,generator has been on it for around 50 years. Why don't you just have it rebuilt, no mounting hassle, belt hassle and no changing back to original later.
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TexasAllis
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Joined: 14 Sep 2009
Location: Texas
Points: 396
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Posted: 28 Sep 2010 at 7:36am |
 DanNESD wrote:
What is is easiest way to wire in an alternator on a D17 diesel. I have a 10si delco. I want to try to tap it into the factory harness. What do I do with the wires on the old regulator. I want to do this without destroying the original harness so I could change it back if when I decide to restore the tractor. |
Get rid of the generator you will be better off in the long run. I just got a quote on a one wire alt of $75 built to energize at any RPM I want. Depending on what is wrong with a generator minimum fix is $100.
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Nathan (SD)
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Joined: 11 Sep 2009
Location: Day County SD
Points: 1260
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Posted: 28 Sep 2010 at 8:52am |
Leave the wires off of the regulator and tape off the ends. I am not sure but maybe one of them energizes with the switch. You could use that one to energize the alt.
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