Posted by George Marsh on April 15, 2013 at 10:44:33 from (64.12.116.200):
Helping a guy work on a MF 50 with a 12v genny. Took the genny apart and cleaned the communtator. I think we got the genny working. The Delco regulator has 3 coils. The top coil is connected to the fields, the middle coil, which is made of perhaps 10g wire, is connected to the armature. The botton coil, which is also made of 10g wire goes someplace???perhaps the switch and back to the +12v.
The wiring is a mess. I got the genny to charge by exciting the fields with a 12v tail light bulb. At an idle the armature showed 13.68 v, however the ammeter is wired backward, it showed discharge. There is no voltage getting to the fields when the switch is on. How should the voltage regulator be wired? A diagram would be nice, but not necessary. Shouldn"t there be 12v going to the fields when power is applied to the regulator? Should the armature wire be connected two the middle terminal of the regulator? Should the switch power up the bottom terminal of regulator?
Going to guess there may be two or more issues.
Is it possible the regulator needs polarized? I haven"t worked on generator in decades and have a bad case of CRS.
Any help will be appriciated. The guy is going to NAPA and try to buy a new regulator. BTW, there are no numbers on the regulator. Numbers may help too. George
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