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Generator

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arky

04-24-2001 18:09:12

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hey i'm new at this ford N thang.Is
there a way to convert a 6v generator
to 12v.The reason i'm askng is i bought a 9N ford that was suppose to
be converted to 12v.But that generator on there sure looks like
the old 6volter to me.and it does not
keep the battery charged up. thanks arky

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Dell (WA)

04-24-2001 18:39:59

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Re: generator in reply to arky, 04-24-2001 18:09:12

Arky..... ...yes, there are real 12 volt generators that do look like OEM 6 volt generators. And then there are OEM 6 volt generators that have had their guts changed to make them into 12 volt generators.

Some tractor owners prefer this "stealth" approach to the conundrum whether to convert to a 12 volt aluminum looking alternator. Some converted to a 12 volt generator before there were alternators.

BTW...6 volt starters just work just faster on 12 volts as long as you don't crank forever on them trying to get started. A good engine on 12 volts should start in 2 rump-rumps...poka-poka-poka...

Sorry, I don't have an eazy shadetree mechanic's way to check if you really have a 12 volt generator. My advice it take it into a real old fashioned generator/starter rebuild shop and have "professionals" test it..... .....Dell

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Po Folks

04-24-2001 19:47:09

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Re: Re: generator in reply to Dell (WA), 04-24-2001 18:39:59

If you put 6 volts into the generator you will get 6 volts out. 12 volts in you will get 12 volts out. The generator will work on 6 or 12 volts.
When I answer a question I have been there, done that. I get no answers from the archives(too many errors there) and don't repeat something I have heard someone say. The regulator is another story, but he did not ask about the regulator. I stand by my answer.

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Barry N Indiana

04-25-2001 03:16:40

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Re: Re: Re: generator in reply to Po Folks, 04-24-2001 19:47:09

A generator is a generator. It's purpose is to generate DC electricity. Why would anyone put voltage into one? It's supposed to generate a voltage output to keep your batterey charged through a regulator! Put 6 V dc into a generator and you've got a motor...put 12V into a 6V generator and you've got a motor that turns faster...until it burns up. An alternator produces AC voltage. It's converted to DC by the Diodes and charges the battery through a regulator.

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hey Claus, is this true? . . . Dell (WA)

04-24-2001 23:20:13

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Re: Re: Re: generator in reply to Po Folks, 04-24-2001 19:47:09

I've never heard of such a thing. 6 volts into a generator will get you six volts out, if I understand your claim.

The logical conclusion of this would seem to imply, if I have a 6 volt battery that has been discharged to say 5 volts, I would never be able to charge the battery back up to 6 volts. 5 volts in, gets you 5 volts out.

I must be missing something somewhere..... .Dell

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Claus

04-25-2001 04:46:24

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Re: Re: Re: Re: generator in reply to hey Claus, is this true? . . . Dell (WA), 04-24-2001 23:20:13

They are talking about field excitation voltages/current. 12 volts into a 6 volt field coil is a good way to fry it. To convert a 6 volt generator to 12 volts, the very least that has to be done is to replace the field coils with 12 volt field coils as well as the regulator. The armature can work but with reduced output. I do not know where some people get their information from...
Happy Motoring
Claus

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Al English

04-25-2001 04:06:23

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Re: Re: Re: Re: generator in reply to hey Claus, is this true? . . . Dell (WA), 04-24-2001 23:20:13

Not to second guess "Po", but I thing what he's saying is that a 6 volt generator will produce 12 volts if it is being controlled by a 12 volt regulator. I've never tried it, but even if it can be done, here's why it shouldn't be. The windings in a motor need the correct gauge of wire and number of turns for a given size and voltage. In mechanical terms this relationship is somewhat like gear ratio. Although brush type DC motors will run on voltages other than their design voltage, excessive heat and/or poor efficiency are the result. There's no reason a generator would be any different than a motor in this respect. We get away with running 6 volt starters on 12 volts, but that's because starters are over built and the duration is short. Do it for any length of time and the starter will be toast. An unregulated alternator can generate some pretty high voltages. Maybe a 6 volt generator can be persuaded to deliver 12 volts. Even if it can, that doesn't mean that 6 volt and 12 volt generators are the same..Al English

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Po Folks

04-25-2001 03:45:15

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Re: Re: Re: Re: generator in reply to hey Claus, is this true? . . . Dell (WA), 04-24-2001 23:20:13

Let me see if I can explain it to where you can understand. If you have a Ford 8N tractor and it has a 6 volt battery negative ground, the tractor has a Ford generator. The Generator is in good working order and is charging. Take the 6 volt battery out and put a 12 volt battery in it's place, change out the voltage regulator and the generator will charge the 12 volt battery. Like I said, unlike some people, I don't get my answers from the archives. A few days ago I bought an 8N
and the previous owner had put a 12 volt battery negative ground in the tractor without changing anything. It was charging. If I had run it very long with the 12 volt battery it would have burned up the coil. I put a 6 volt battery in the tractor and this minute if I crank the tractor it will charge the 6 volt battery. This is my final post on this matter. If you can't understand it, I'm sorry.

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04-25-2001 13:16:35

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Re: Re: Re: Re: Re: generator in reply to Po Folks, 04-25-2001 03:45:15

I had a 6-volt Farmall 100 with an 8 volt battery. We took it out and put in a 12-volt, and Chrysler resistor and that was it. The generator was charging the battery. I asked the old guy at the generator place if I needed to change it to a 12-volt and he said it was putting out 13 volts so we left it alone. Never had any problem with it. BTW, Surplus Center has Ford 12 volt generators for $99.00.

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sorry, am not convinced . . . Dell (WA)

04-25-2001 13:01:07

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Re: Re: Re: Re: Re: generator in reply to Po Folks, 04-25-2001 03:45:15

Po..... .your example of 6 volt generator charging a 12 volt battery, is empirical at best and poor engineering practice at worse.

BTW, my answer was not from the "archives", but from real world experiences. Claus was a real generator rebuilder. Al English is a professional old timey automobile restorer. Both with solid creditials.

Thank you for explaining your experience, but I am not convinced, respectfully..... ..Dell

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Barry N Indiana

04-25-2001 03:55:46

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Re: Re: Re: Re: Re: generator in reply to Po Folks, 04-25-2001 03:45:15

A 6 volt generator will charge a 12v battery up to the output of the generator. Some 6V generators will produce 7 to 9V. but it will not keep a 12 v battery charged to the max.

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Po Folks

04-24-2001 18:22:40

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Re: generator in reply to arky, 04-24-2001 18:09:12

Generators don't care. 6 or 12 volts in will get you the same out.

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