Posted by Rich in WI on April 21, 2009 at 13:25:03 from (72.69.148.47):
In Reply to: M starter questions posted by Rich in WI on March 27, 2009 at 21:27:57:
Thanks for the help everybody. Seems I did see the stud turn a little but must not have broken the weld to the field magnets. Everything checked out fine with a meter. The youtube video I found mentioned brushes causing the starter to fail and then work again after tapping on it. That got me to thinking maybe me bumping it around taking the starter off and on the tractor would be enough to make it work again. Turns out, I think that was the problem as the brushes were pretty bad. It was hard to tell because looking in the empty case, everything looked fine but I kinda measured the opening between the brushes after I removed the windings and compaired that to the commutator diameter and there was not much left for brushes.
I didnt have any new brushes so I just filed the edges clean and reinstalled them. Then I polished up the commutator, it was pretty dark with carbon. Put it all back together and it started perfectly. So far its been back together for a week and no problems so I am hoping the problem was the brushes. Now I just have to find someplace that sells a rebuild kit or just brushes, Im pretty sure my fix was a temp fix at best but at least I know what it is and can take it apart in about a hour.
Here is the youtube video I found, it was pretty helpful seeing as how I didnt really know what I was doing and have never disassembled a starter before. I have replaced them but never taken them apart and fixed them.
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