Allis Chalmers B 3 way switch

Sammy624 · Sep 4, 2013

I am trying to figure out what the 3 way switch does on my old 1950 Allis Chalmers B tractor. I know that the middle position is the lights, but i am not sure what pushed all the way in does, or pulled all the way out.
If anyone could help that would be awesome.

Chris(WA) · Sep 4, 2013

In should be electrics off. Middle is charge. Out is lights on and charge.

Jerry Coulter · Sep 4, 2013

In: Lights off, 2 amp charge
Half out: Lights on, full charge
Out: Lights off, full charge

Sammy624 · Sep 4, 2013

thanks for all the tips, but mine is for sure lights on- middle position

JMS/.MN · Sep 4, 2013

JC is correct.

Sammy624 · Sep 4, 2013

alrighty, great to know. Thank you all

steve(ill) · Sep 4, 2013

Sammy, JC is correct. In addition to that, there is a resistor on the switch. That connects to the "F" terminal of the generator and controls the charge rate of the generator. Your 6 volt system has no voltage regulator or current regualtor... the resistor tries to do that. In addition, it controls the lights.

Ted in NE-OH · Sep 4, 2013

Jerry is correct for the original Allis Chalmers switch. However the after market switches with the big white resistor are different, same functions, different positions.

Sammy624 · Sep 5, 2013

ok thank you, great to finally know

Allis Chalmers B 3 way switch

Sammy624

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Chris(WA)

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Jerry Coulter

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JMS/.MN

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