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Re: Farmall 504 generator
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Posted by Bob on August 31, 2005 at 12:20:14 from (64.21.249.40):
In Reply to: Farmall 504 generator posted by Glenn W on August 31, 2005 at 10:52:28:
If it's not a show queen tractor, and you're NOT a stickler for originality, AND it's running, LEAVE IT ALONE. The alternator most likely has a built-in regulator, and the coil likely is a true 12-Volt unit that does not need a resistor. If it does, soon the dreaded "burnt points syndrome" will rear it's ugly head. If you have a good, ACCURATE DVM, you can get an idea of what coil you have by measuring the primary resistance. A true 12-Volt coil will have a primary resistance in the range of 2.5 to 3.5 Ohms. A coil that needs a ballast resistor for 12-Volt use will have a primary reistance in the 1.6 to 2 Ohm range.
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