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Re: Farmall M - 12 V conversion
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Posted by John T Electrical Engineer on December 24, 1998 at 06:43:53:
In Reply to: Farmall M - 12 V conversion posted by Brent on December 22, 1998 at 11:31:21:
Brent, I may have answered this already on the Talk Board ?? The 12 v. conversion advice from all the guys below is right on. Change bulbs to 12 v., add a ballast resistor in series with the coil high side (opposite the low side to distributor) feed wire to reduce voltage drop across coil to 6 volts. If you have a voltage regulator, change it to a 12 volt and polarize it per the instructions but use your existing generator cause it will work fine and charge at 12 v with new regulator. CAUTION, you have to get the same type regulator (like a Delco) because Ford and GM regulators were different and will not interchange. One is for a series field and the other a shunt field, but Im pretty sure they used delco (GM) on all those. However, many of those tractors just have a cutout on the generator and no regulator using only the two field series resistors in the dash to control the rate of charge. Still, on ones with a cutout, I have changed to 12 volt batteries and the generators still charged fine with no other modifications. I have done many conversions and left the 6 v starter which worked fine no problems ever! If you have any other electrical questions, feel free to post back or e mail me jmn50@msn.com Merry Christmas John T in Indiana
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