6v gen

PeteEllis · Jul 25, 2012

can I get 12 V from a 6 volt gen if I spin it faster and put 12 v regulator o n it

gene bender · Jul 25, 2012

Yes if ya dont want it to last very long just take it to a shop and have them convert it or get a rebuilt or used one.

sallystractor · Jul 25, 2012

John T · Jul 26, 2012

I have done it and it worked, a genny dont necessarily know its output, thats increased if it spins faster and/or you pump more current through its field windings (what the VR regulates). NOTE BEFORE ANYONE HAS A CALF Im NOT saying that engineering correct or it charges at any high rate, Im ONLY SAYING as an engineer and one who has done it, YES IT CAN WORK. Of course, a genny shop can easily convert it, they change out the field windings, thats the engineering correct way to do it

John T

teddy52food · Jul 26, 2012

You can, but the amps will only be half.

PeteEllis · Jul 26, 2012

thanks john I get lower output like you guys said but gets enough for now.

SadFarmall · Jul 27, 2012

You do not need to spin the generator faster. The voltage regulator (not the cutout) just regulates current flow to the field coils / pole shoes. Yes, a 6 volt generator will operate at 12 volts, BUT you should be careful. A generator in excellent condition internally will tolerate the change, so long as you do not increase the current output too much. However, if the internals are a bit tired (weak insulation etc) there is a serious risk of starting a fire. Personally, I would just fit a 12 volt generator. I presume that Delco-Remy manufactured 6 and 12 volt generators just as Lucas did. I had the option of fitting a C39 or C40 Lucas generator at either 6 or 12 volts. Even the voltage regulators look identical, apart from the 12V stamp.
SadFarmall

mkirsch · Jul 27, 2012

How much are you going to spend on the 12V regulator to make this conversion?

Regulators are $40 and up.

A rebuilt Delco 10SI alternator is $29.99 at Autozone. Even if you have to pay the core charge of $15, it's still comparable to just the regulator.

The alternator gives you a reliable charging system that's not going to fail on you at any minute because you're pushing it at 2X its designed output.

Most tractors can be converted with the alternator, a piece of 3/8" threaded rod, a few nuts, and some wire.

SadFarmall · Jul 27, 2012

OK, this is something of a worry. My Farmall M is still 6 volt (I am pig headed and won't change to 12 or 24 volt). It has a Lucas generator, regulator and starter. Yes, the generator and regulator did fail to keep the battery charged… after fifty years of reliable service. Surely Delco-Remy generators and regulators are not bad? I am getting a Delco generator for my Farmall H, but I keep seeing posts about unreliable regulators etc. If I want to stay 6 volt on my Farmall H, should I get pulleys and a bracket made up for Lucas gear?
SadFarmall

6v gen

PeteEllis

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gene bender

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sallystractor

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John T

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teddy52food

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PeteEllis

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SadFarmall

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mkirsch

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SadFarmall

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