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Model B generator polarity

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Steve Jelf

11-25-2004 21:04:25

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Before I start up my 1945 Model B with its newly rebuilt generator, I want to be sure I get it polarized correctly so I don't screw it up. I found a discussion of this from last year, but the procedure described involved the light switch. But my B has no lights and therefore no switch. There is a regulator, not just a cutout. The setup is like this: Generator F terminal to Regulator FIELD; Generator A to Regulator GEN; Regulator BAT to Ammeter -. So what's the procedure here?

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11-26-2004 17:41:15

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 Re: Model B generator polarity in reply to Steve Jelf, 11-25-2004 21:04:25  
the B ternimal goes to the ampmeter. the other side of the amp meter goes to the battery terminal. if you run to the + terminal and ground the negative side, you have a negative ground system. if you run the wire to the negative terminal and ground the + you have a positive ground system. ALL Bs in the begining were 6 volt positive ground. do you know what you have? is the generator 6 or 12 volts? once all the wires are connect you need to touch the B and A terminals together for a second with a jumper wire to set the polarity. next start the tractor and see if the amp meter is working.

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Steve Jelf

11-26-2004 19:15:26

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 Re: Model B generator polarity in reply to steve(ill), 11-26-2004 17:41:15  
All is 6 volt. It's positive ground. This sounds so simple even I should be able to handle it.
Many thanks.

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11-27-2004 06:20:26

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 Re: Model B generator polarity in reply to Steve Jelf, 11-26-2004 19:15:26  
your tractor could have been converted over the years. when i said ALL i ment from the factory. they also put cutouts on ALLl of the B. since you have a regulator, i questioned ifit stil has the 6 volt battery or if it was chanaged out.

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biged 957

11-27-2004 15:18:24

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 Re: Model B generator polarity in reply to steve(ill), 11-27-2004 06:20:26  
NOTE! when u Flash the gen it only takes a second DO! Not hold otherwise U can distroy the reg.

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