6v-12v generator

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6v-12v generator

Postby Bhaeck » Mon Apr 16, 2018 11:08 am

Have a 12v generator cub just got a nice trencher cub and want to keep the original look but want 12v neg ground verse the 6v pos ground it now has.

First my understanding is if I swap leads at battery and amp meter the pos to neg issue is fixed or am I missing a step?

Second my plan was to change lights for 12v and rewind generator to 12v. My very very smart electric motor guy who I have yet to see be wrong says no need. He claims that all I need to do is change out my voltage regulator and all is fine that the 6v gen will put our enough voltage.

Again never seen him wrong ever but has anyone witnessed this?

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Re: 6v-12v generator

Postby staninlowerAL » Mon Apr 16, 2018 11:50 am

Don't understand the 12v generator part and the 6v pos ground part. Are you talking about 2 different tractors????

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Re: 6v-12v generator

Postby inairam » Mon Apr 16, 2018 12:05 pm

You also need a new coil or an external resistor and have to switch the leads on the coil.

I do not think the regulator alone will do it. The generator's output was 7-8 volts depending on the unit. see attached
I would not rewind a 6 volt unit. I would post in the Vine that you are looking for a 12-volt unit and get that over hauled by your friend.
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Re: 6v-12v generator

Postby Bhaeck » Mon Apr 16, 2018 12:11 pm

I have 6v pos ground now want to change to 12v neg ground but use generator still not change to alt.

Thanks for the voltage output info. He is very knowledgeable on motors. He rewound a 2300v motor for the company I worked for to decrease its rpm to what we wanted so not a shade tree mech at all but kinda think he missed the mark in this one.

Yes I forgot to add that to post different coil and reverse leads thanks

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Re: 6v-12v generator

Postby SONNY » Mon Apr 16, 2018 1:06 pm

Obtain a straight 12-v gen., rebuild it if necessary and slap it on!---Makes life much easier, and cheeeeper! LOL!!!! thanks; sonny

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Re: 6v-12v generator

Postby John *.?-!.* cub owner » Mon Apr 16, 2018 1:27 pm

The 6 volt generators are capable of putting out 12 volts, but the current they can deliver at that voltage will be a lot less.
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Re: 6v-12v generator

Postby Jim Becker » Mon Apr 16, 2018 4:52 pm

John *.?-!.* cub owner wrote:The 6 volt generators are capable of putting out 12 volts, but the current they can deliver at that voltage will be a lot less.

Agreed. Also, I have been told that the field coil will run hotter than normal if you use a 6-volt generator to produce 12 volts. I don't know how much hotter, but more heat == less life. I've never done any tests to confirm it, but it does seem to make sense.

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Re: 6v-12v generator

Postby ntrenn » Mon Apr 16, 2018 6:13 pm

Pop had our 63's 6 volt generator changed to 12v in the 70's...still charging fine...
Not sure you can get those parts any longer...my vote would be the same as above...buy a 12v generator outright...

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Re: 6v-12v generator

Postby Landreo » Mon Apr 16, 2018 7:43 pm

Your motor guy did not miss the mark. What he suggested was commonly done back in "the day". All 3 brush generators on a cub will put out much more than 12 volts if working correctly. The 2 brush also will typically put out more than 12 volts. The voltages in the posted chart are for regulated output.

The field windings will have more current flowing but I don't think the generator will come close to getting too hot.

You do not have anything to lose other than having to get a 12 volt regulator.

The generator will only supply so many watts of power which is more than likely limited by the speed of the generator rather than the size of the windings. However, if you do put a 12 volt regulator on the 6 volt generator, I would check the generator a few times to make sure it is not getting hotter than normal.

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