Bill in IL said: (quoted from post at 22:29:31 09/25/09) I finally got the M generator charging after JMOR posted a picture of how to adjust the 3rd brush.
Now I am trying to figure out the H. I had the generator apart everything looks good for an old generator. Ohm checked as much as I could no shorts to ground that I can find. Cleaned the commutator, brushes are decent.
I took the belt off and did a motor test it runs.
Hooked it up grounded the field terminal touched the battery wire to the armature to polarize it start the tractor and I only have .6 volts from the armature stud to ground.
Did I hook this up properly to do a simple generator check? Tried to check the archives and can't seem to find the procedure to do that (cause I need it). I am not ready to give up on this one cause I think its good just need to prove it.
I know for sure the cutout regulator is bad. Took the cover off and the resistor from F to gen is fried. What value is that or what does it take to wind a new one?
You may wish to simply ground the field terminal to verify that gen will have a good output. This forces max field current & thus maximum output for testing purposes.
What is field resistor for? Well, this archived post pretty well explains it:
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PostPosted: Sat Nov 15, 2008 12:04 am Post subject: Re: #@$%*##$ charging system Reply to specific post Reply with quote
Owen Aaland wrote:
(quoted from post at 14:00:02 11/14/0Cool Cut out switches will never have a terminal for the field control wire. The field control wire goes to the light switch where it is grounded through the resistor in the low charge position and direct to ground in the high charge or lights on positions. In this system it is necessary to have a good ground path from the light switch all the way to the battery.
actually the originals do have an Field terminal. It has a resister to ground to complete the field circuit in applications where there was no lights, therefore no light switch, but needed to charge battery for the starter. The field terminal is not normally used, however, since that particular application is rare. If the light switch field resister is burned out you can run a second wire to the F terminal on the cutout to provide the low charge function.
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