M JD Generator Update

Sent the generator on the M to Sharps and had it completely restored so everything should be fine now.

I am starting off with the "motor" test.
With the generator mounted to tractor and belt removed. I have a wire from field on genny to lower genny mounting bolt. When I apply battery voltage to genny armature terminal the genny spins.

Ok now when I remove the jumper from field to ground the genny should increase in speed correct? Well this one doesn't it stops when I remove jumper from field to ground. So this means no matter how much I cleaned the mounting bolts and ears on genny it's still not grounded to tractor right??
What do I do??
 
Anybody with any tips? I have ran the tractor on a bushog for two days now wide open and on high charge and battery voltage is less every time I get done and check it so its still not charging. I hope I get this figured out quick I want to take it to a plow day in a couple weeks. Thanks.
 

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