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Harry Ferguson Tractors Discussion Forum

TO 35 not charging

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Archie in KY

12-26-2007 15:20:19

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I have a stock 12 volt TO 35. I just had the generator gone over. I jumped the terminals on the generator and got a spark so I know it is putting out. I put on a new voltage regulator. When you turn on the ignition switch the voltmeter will jump up to about 4 volts. Once the engine starts it doesn't read anything. Have I bought a bad regulator or might something else be wrong.

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Fred T. Hart Jr.

01-06-2008 17:29:21

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Re: TO 35 not charging in reply to Archie in KY, 12-26-2007 15:20:19

I have been there, checked all charging system parts, replaced parts, but system still would not charge properly.

Problem was the battery: If you have a charging problem you must check battery first, charge battery then have a load test (parts store) if battery is bad, your charging sytem will not work and can burn up you regulator.

If generator is working, you may have to trace each wire, if like my to35 wires are old and rotten, you may have a break. Be sure the new regulator is correct, hard to tell for these parts counter boys.

Good luck,

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Stan/TX

12-31-2007 20:59:06

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Re: TO 35 not charging in reply to Archie in KY, 12-26-2007 15:20:19

You might want to make sure you have a voltage regulator that is for the ground you use. If you are positive ground you will need a positive ground VR. You are really polarizing the generator. The instructions Gregg gave are good if you have a negative ground system. If you have a positive ground system then touch the negative terminal on the battery. In other words jumper between the "A" terminal on the generator and the non-ground terminal on the battery. This is just stuff I have learned from people on this forum - just want to pass it on.
Have a fantastic NEW YEAR - as you guessed it is a little dull here in Decatur, Texas.

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gregg/Ohio

12-26-2007 21:04:27

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Re: TO 35 not charging in reply to Archie in KY, 12-26-2007 15:20:19

polarize regulator?

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Archie in KY

12-26-2007 21:45:59

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Re: TO 35 not charging in reply to gregg/Ohio, 12-26-2007 21:04:27

Gregg, How do you do that?

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Gregg/Ohio

12-27-2007 13:44:57

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Re: TO 35 not charging in reply to Archie in KY, 12-26-2007 21:45:59

Archie:Take a jumper wire and touch the armature connection( the A terminal ) on the generator to the pos (+) on the batt just brush it once and your done, Gregg/Dayton

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Archie in KY

12-27-2007 14:34:32

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Re: TO 35 not charging in reply to Gregg/Ohio, 12-27-2007 13:44:57

Thanks Gregg; I had forgotten how to do that. Anyway it didn't fix it so I guess I got a bad regulator. Guess I'll go to the parts house tomorrow unless someone can tell me something else to try.

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Gregg/Ohio

12-29-2007 13:12:28

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Re: TO 35 not charging in reply to Archie in KY, 12-27-2007 14:34:32

There are 2 regulators that fit your Tractor, Besides 6-or 12volt versions, Take your old unit with you,to match up Terminals. The are not hard to find,at the Parts stores. Gregg

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