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8N charging woes

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Mike (CO)

11-29-1999 14:43:07




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I'm restoring a 1949 8N. I do not believe the generator is charging the battery. I removed all the leads off the generator, and while the tractor is running, I only read 1.5 volts from the Arm winding to Gnd and 1.5 volts from the Field winding to ground... is this normal generator output while running??

Across the battery while running, I read 6 volts and the ammeter on the tractor registers zilch.

I read nothing from the Arm and Field terminals to Gnd on the voltage regulator while running... and read 6 volts from the Batt terminal to Gnd.

Have I not 'charged' the voltage regulator - and how do I do that exactly ?? :-) Help..

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Max

11-30-1999 10:58:11




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 Re: 8N charging woes in reply to Mike (CO), 11-29-1999 14:43:07  
I am nowhere near the expert as some of those who answer questions, but a simple down home test I have always done to tell whether it is the generator or the battery is simply to pull the battery cables off when the tractor is running. If it keeps running - you're putting out juice.



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Claus

11-29-1999 17:56:56




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 Re: 8N charging woes in reply to Mike (CO), 11-29-1999 14:43:07  
You are not going to read any appreciable voltage on a generator that is turning without any connections to it. At the very minimum, the field terminal must be grounded to get output. Matter of fact, that is one of the checks that one would perform in case of trouble. This would be done with all the connections properly hooked up. To properly polarize the generator, you would hook a jumper from the bat terminal of the voltage regulator to the field terminal of the regulator for a couple of seconds then remove the jumper. If the generator puts out with the field terminal grounded on the generator, then most likely the voltage regulator is defective. If under these conditions, you read voltage at the generator but still not charging, connect a jumper from the amr terminal of the voltage regulator to the bat terminal of the voltage regulator. If you now see a charging condition, replace the voltage regulator. A quick check for the generator is to motor it. You would disconnect all the connections on the generator. Then ground the field terminal. Then apply 6 volts to the armature terminal. The generator should spin. Of course you must disconnect the fan belt since it will not turn over the engine.
Hope has been helpful.
Happy Motoring
Claus

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ZANE

11-29-1999 17:25:21




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 Re: 8N charging woes in reply to Mike (CO), 11-29-1999 14:43:07  
Go to the address below that is from the tractor resorse page and it will give you everything that you need to know about the electrical system and you can skip all us maybe expert ideas.


http://hometown.aol.com/naa60512/elect.htm



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