Re: M wiring

Posted by Steve - IN on May 10, 2003 at 23:07:24 from (12.222.17.59):

In Reply to: M wiring posted by Scott Glick on May 10, 2003 at 18:44:20:

Scott,
You don't say how many terminals your regulator has. I'll guess it has 4, like my H does.

If that's the case, the single terminal by itself on one side of the regulator runs to the A or armature terminal on the generator. Looking from left to right on the side with three terminals when the single terminal side is UP -- the farthest left is the L or load terminal -- it runs to the fuse or direct to the ignition switch (can go either way, but probably safer to run thru the fuse). The center terminal should be labelled B or Batt and runs to the ammeter, the other side of the meter runs to the battery. The farthest right terminal runs to the field coils or F terminal on the generator.

Now... if my guess is wrong, and you only have two wires because the setup has a cutout instead of a regulator, the Gen side runs to the Armature terminal on the generator and the Batt side runs to the ammeter.

If you have the 4 positon light switch, you probably have a cutout (or the machine started out life that way) If you have a 3 position light switch the tractor started life with a regulator instead of a cutout. The function of the 4th position is to burn up extra generator power so the battery doesn't get over charged -- as the cutout doesn't protect against that, it only keeps the battery from draining into the generator. If you have a 4 terminal full regulator and a 4 position light switch -- not to worry, the 4th position on the switch with the big resistor is a no-connect, not needed.

Hope this gets you started and gives you some of the why's and wherefors.... BobM has posted some really good diagrams he drew somewhere... you might find them by searching the archieves here. When in doubt -- check his drawings.

Steve

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