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Allis Chalmers Discussion Forum

Allis B Neg. or Pos ground.

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11-09-2003 19:02:36

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Been pretty much an old Farmall man but had a chance to buy a little Allis B at a yard sale a while back. It's a 53 model with electric start,
but at present has no battery so I just crank it.
Is the 53 B a pos ground like the old Farmalls or a neg ground. It's a nice little tractor, but
it's time to restore it. Thanks for your help.

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Kent of SW MO

11-11-2003 11:47:45

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 Re: Allis B Neg. or Pos ground. in reply to shoe, 11-09-2003 19:02:36  
Positive ground. If you change to negitive ground and have battery ignition do not forget to change the coil polarity.

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11-11-2003 06:57:40

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 Re: Allis B Neg. or Pos ground. in reply to shoe, 11-09-2003 19:02:36  
original 6 volt positive ground. you can use 6 or 12 volt negative to start. starter does not care. if you switch to 12 volt, buy a balast resistor for the distributor coil (to drop back to 6 vt), and change any lights.

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Doug in OR

11-09-2003 19:46:18

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 Re: Allis B Neg. or Pos ground. in reply to shoe, 11-09-2003 19:02:36  
Rule of thumb: Virtually all 6 volt systems for these tractors are positive ground. Not that it would be a big deal of someone changed it to negative ground.

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