Posted by John T on July 25, 2010 at 10:03:42 from (66.244.97.31):
In Reply to: Farmall H generator posted by w400 on July 25, 2010 at 03:23:05:
If its ALWAYS fully charging Im thinkin like Brownie the genny itself may have a permanently grounded Field (at or near F terminal) or else the Regulator or light switch controller (whichever it has) may be permanently dead shorted relative to the Field control circuit.
See what it does if you remove the wire on the gennys FLD post????????????? If it still charges full theres an internal short in the gennys Field wiring PERHAPS AT THE F POST BECAUSE THE NUT WAS OVERTIGHTENED!!!!!!!!! From the gennys FLD post to its case frame there should be like 2 to 4 ohms representing the sum of the 2 fields in series HOWEVER its like zero ohms look for a short possibly cuz the nut was overtightened or theres an internal short from the field winding to case frame
If she goes to low or no charge with the wire removed from the gennys FLD post but ALWAYS charges at max otherwise, I suspect a bad/shorted voltage regulator or a short in the light switch or wiring to the light switch if its a cutout relay and light switch system.
If its a 3 brush adjustable genny and the third brush is set to full high charge that could also be a problem buttttttttt I suspect one of the 2 problems above.
Its the correct voltage genny for your system right?? NOT a 12 volt genny??
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Today's Featured Article - Converting from 6 Volt to 12 Volt - by Chris Pratt. It's a common problem for old machines especially when the weather starts to dip below 40 and the tractor isn't fired up as often. You are probably used to the 12 volt Diehard, charged with 200 amp alternator of your 3/4 ton that always is ready and always starts. It's this type of experience that brings about the many queries we get for 12-volt conversion kits. Since only a few kits are available (we sell kits for the
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