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Converting 1948 Farmall Cub to 12 Volt System

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Doug

10-19-2003 18:18:04




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I know there is a wealth of information on this subject posted here, but is there one article or posting that gives detailed information on making the conversion from 6 volt to 12 volt, using an alternator rather than a generator? Is the system still positive ground when convertd to 12 volt using an alternator? Thank you!




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steve

10-20-2003 19:55:18




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 Re: Converting 1948 Farmall Cub to 12 Volt System in reply to Doug, 10-19-2003 18:18:04  
Doug, the conversion is very easy. the hardest thing is mounting the new alternator and aligning the pulleys so the belt runs straight. The most common alternator is the DELCO 10SI, you can get this from a 1975-85 chevy car or truck. Sell them at auto parts store for $40. just make sure it is the internal voltage regulator type built after 74 or 75. ---You run a heavy wire from the bug 1/4 inch lug on the alternator to the battery + terminal, usually thru the amp meter. you also put 12 volts to the #2 terminal on the alternator. the #1 terminal (spade terminal) as 12 volts when running, but is switched off by a key or toggle switch when not running. You can also use a smaller japaneese type alternator if you wish. main thing is to find which terminal is the "signal" or switched on and off with 12 volts. Starter dont care if tractor is 6 or 12 volt or + or - ground. --change all 6 volt lights to 12 volt--- all a dropping voltage resistor to the ignition coil if you have a distributor so you maintain 6 volts to the coil. if you have a magnito, dont worry.-- if you need more info, just ask.

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Doug

10-19-2003 18:52:40




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 Re: Converting 1948 Farmall Cub to 12 Volt System in reply to Doug, 10-19-2003 18:18:04  
Ok, I guess I did not "dig" far enough into the archives. Lots of information on converting to 12 volt.However it's not all in once place. Is there an article with the "how to" as well as a parts list and diagram? Thanks.
Doug



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Paul Shuler

10-19-2003 20:37:15




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 Re: Re: Converting 1948 Farmall Cub to 12 Volt Sy in reply to Doug, 10-19-2003 18:52:40  
Doug the best source is from a great guy one this site that goes by Bob M. If you page down just a little ways on tonights questions there is one with the heading "converting 48 Farmall A to 12v" there is a link along with this posting that will take you to some of Bob M's diagrams that should be a big help to you. On your grounding ? it will be 12v neg ground.



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Paul Shuler

10-19-2003 20:38:43




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 Re: Re: Re: Converting 1948 Farmall Cub to 12 Vol in reply to Paul Shuler, 10-19-2003 20:37:15  
Sorry that title was " Super A starting problems" just down from your post.



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