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Tractor alternator

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Texas Denny

06-12-2005 07:19:41




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Before anyone gets upset, I have seven Allis Chalmers tractors. But I've collected a few of the other brands just to have variety for the family outings to my ranch.

Though it is an occasional event, even the unluckiest oil and gas tractor jocky has some luck.

About 4 months ago, the alternator on my 901 Ford quit working (the 901 SOS is a good front end loader tractor). I had so many other things going on that I decided to let it go. I could use the tractor all day on one battery charge so it didn't seem too important. Yesterday when I was using it, the alternator started working again. I just stared at the amp gauge for a couple of minutes expecting it to drop back to slight discharge. But, it didn't drop back. It worked all the while I used the tractor. And it was controlling the voltage.

Yesterday marked the first time that I can remember that any tractor part fixed itself without my intervention.

How about anyone else? Did any of you ever have a miraculous tractor recovery?

(I hope I didn't speak too soon. The alternator probably won't work the next time I use the tractor.)

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Keith-OR

06-12-2005 15:44:53




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 Re: Tractor alternator in reply to Texas Denny, 06-12-2005 07:19:41  
Denny just curious, How big of a hammer did you use?? I might want to patent the process..LMAO..Keith



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Texas Denny

06-12-2005 15:56:14




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 Re: Tractor alternator in reply to Keith-OR, 06-12-2005 15:44:53  
I wish I had a clue about what act precipitated my good fortune. I would do it (or whatever) more often for these results.

My setup has an internal regulator with a GM alternator. To excite the field, I installed a push button under the dash. Whenever I would start the tractor, after it is running, I would push the momentary button and the alternator would spring to life. Once excited it would draw field current from the armiture and continue charging until the tractor was turned off.

It could be an intermittant in this switch.

I'm going to pick up a diode and put it between the ignition and the regulator which would eliminate the push button.

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Keith-OR

06-13-2005 23:51:37




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 Re: Tractor alternator in reply to Texas Denny, 06-12-2005 15:56:14  
I installed truck altrnator on my Ford 640 in 1985 was a 80 amp Niehouft. This one did not need the high rpms to excite. I intalled a mitsubishi (spelling) on my Allis C using a the diode in the field circuit. Best of luck...Keith



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acmfmh

06-12-2005 13:50:38




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 Re: Tractor alternator in reply to Texas Denny, 06-12-2005 07:19:41  
Probably dirt, grease, or oil on the contact points. Using it and getting it hot probably helped clean things up. Congrats.



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Texas Denny

06-12-2005 15:33:55




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 Re: Tractor alternator in reply to acmfmh, 06-12-2005 13:50:38  
Solid state regulator.



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acmfmh

06-13-2005 08:50:46




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 Re: Tractor alternator in reply to Texas Denny, 06-12-2005 15:33:55  
Some sort of loose connection?



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CK RICHARD

06-12-2005 12:52:09




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 Re: Tractor alternator in reply to Texas Denny, 06-12-2005 07:19:41  
I'll say that the contacks were stuck in the voltage regulator.some times you can file them just like pionts and it will help.



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Texas Denny

06-12-2005 15:33:09




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 Re: Tractor alternator in reply to CK RICHARD, 06-12-2005 12:52:09  
It is a solid state regulator - no contacts. Never heard of a failed IC recovering. As "Old" said, it is probably the wire that excites the field. Can't be the connections to the armiture as the gauge always worked properly.



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Govn'r

06-12-2005 07:53:17




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 Re: Tractor alternator in reply to Texas Denny, 06-12-2005 07:19:41  
Denny, no chance if I go out to my garage, I will have oil pressure on my wc? LOL



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Texas Denny

06-12-2005 08:05:37




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 Re: Tractor alternator in reply to Govn'r, 06-12-2005 07:53:17  
No, that probably won't happen without you doing something. But why would an alternator suddenly start working? I guess you never know.

And don't get me started on friendly ghost stories.



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old

06-12-2005 08:25:19




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 Re: Tractor alternator in reply to Texas Denny, 06-12-2005 08:05:37  
As to why it started working it could be a number of things. Maybe you have a brush stuck, a loose wire some where or maybe an amp guage with loose parts inside.



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Texas Denny

06-12-2005 09:48:08




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 Re: Tractor alternator in reply to old, 06-12-2005 08:25:19  
Guess I better check all of those things. So it wasn't a free fix after all!



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old

06-12-2005 12:54:18




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 Re: Tractor alternator in reply to Texas Denny, 06-12-2005 09:48:08  
Well yes it was a free fix, but it could also be telling you that you have a problem that could cause you a bigger problem.



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