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 - Two-Brush Generators - by Chris Pratt. Whether for product liability or because the aftermarket parts and labor business is lucrative, this concept is disturbingly prevalent. Fortunately when you step into your shop and make that jump 50 years back in time to work with your old tractor, this concept goes out the window. Even so, when it comes to the charging system, people quickly revert to this idea and start replacing the major components one at a time until it works. The reason you don't find any decals in your replacement set wit
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