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John Deere Tractors Discussion Forum
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1947 john deere model B-- 6 volt or 12 volt???

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Jake

11-11-2003 18:38:37




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I purchased a 1947 john deere model B, SN 201474 in poor condition....no battery, and i cannot find anything in the manuels to tell me if this is a 6 or 12 volt tractor. It has the original generator and no electrical changes have been made. Can anyone tell me how i can tell what battery should be installed. thanks




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Jake

11-12-2003 06:25:02




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 Re: 1947 john deere model B-- 6 volt or 12 volt??? in reply to Jake, 11-11-2003 18:38:37  
Thanks fellows:

I appreciate each one of you responding. I am sure this will help me a bunch. Will let you know how i make out.

thanks again

Jake



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Allan

11-12-2003 03:23:32




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 Re: 1947 john deere model B-- 6 volt or 12 volt??? in reply to Jake, 11-11-2003 18:38:37  
Hi Jake,

The 12 volt systems made their debut somewhere around the 1955 era. Cars, trucks and tractors.

That seems to be about the general 'crossover' year, anyway.

Allan



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John T

11-11-2003 19:15:06




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 Re: 1947 john deere model B-- 6 volt or 12 volt??? in reply to Jake, 11-11-2003 18:38:37  
Jake, my literature shows Model B's SN 201,000 and up (like yours) still as 6 volts, and it was originally wired positive ground. If you want to stay as original and positive ground, install the highest rated amp/hr or CCA heavy duty 6 volt battery that will fit in the box and I recomemnd use of 00 Gauge starter and ground cables. Once all is wired, polarize the generator (assuming it has a 2 wire cut out relay) by first temporarily grounding the Field post on the generator and then momentarily flash jumping a wire across the cut out relay i.e. from its BAT to its ARM (or GEN) terminals and you should get a small spark. If the ammeter is wired correct, if you turn on lights tractor not running it should swing to discharge.

If you need more help or she wont charge, post back or e mail me at [email protected] and I will try to help you. Be sure the belt is tight and the gen and cut out relay well grounded and all wires are correct and see how you get along.

Good Luck n God Bless ya there Jake

John T

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Clooney

11-11-2003 18:44:27




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 Re: 1947 john deere model B-- 6 volt or 12 volt??? in reply to Jake, 11-11-2003 18:38:37  
Jake, original was a single 6 volt...Positive ground [that's positive battery post hooked to the ground cable]..



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