8N generator misbehaving

[David Lewis]

I've just put a new wiring harness, regulator, ignition switch, coil, distributor, resistor on a 1949 8N, and it runs fine. But now the regulator points on the left side have fused, so when I connect the battery, the generator turns. What is going on here?? Feels like generator is shorting or something and needs replacing, but what are your thoughts?

 

[Bruce (VA)]

If you ground the field & connect the armature wire to the battery terminal, the generator will "motor".

You wired it wrong, or you got the wrong v/r or the wrong wiring harness.

And, chances are real good that the v/r is now a paper weight.
50 Tips

 

[JMOR]

(quoted from post at 18:51:42 06/30/11) If you ground the field & connect the armature wire to the battery terminal, the generator will "motor".

You wired it wrong, or you got the wrong v/r or the wrong wiring harness.

And, chances are real good that the v/r is now a paper weight.
50 Tips

ruce, you forgot to mention that the new reg might have been junk.
Didn't change battery ground polarity did you?

 

[elmersooner]

sounds like you just came up with a way to make the N tractor a hybrid drive--replace voltage regulator and check to see if you are positive or negative ground.

 

[souNdguy]

if you changed bat polarity and did not polarize genny.. it likely welded the cutout points.

soundguy

 

[David Lewis]

Whoever had this tractor before me had the battery in backwards, i.e. negative ground. 8Ns are positive ground right, so do I need to polarize the generator and buy a new regulator??

 

[36 Coupe]

The generator is not the problem.