2N wiring issue

B384 · Jun 28, 2009

Ok so I worked on this tractor all day with no good end result. Still have starter grounding out some how. I checked to make sure starter wasn't stuck on flywheel by rocking back and forth while in gear. Unbolted starter and actually took it apart to make sure nothing was grounding out that shouldn't be. Brushes were a pain getting back were needed to be. Everything seems to be ok with starter. Put it back together and same issue. Entire starter is grounded........even terminal post lead. Kinda is a problem when silenoid is positive from battery on 1 side and negative from starter on the other. Push starter button and melt down.............I am lost and can't figure out why terminal on starter is grounded out. Their is an insulator around terminal and it seems ok and stud is not making contact with case, but brushes are screwed to case and appear to be connected with windings around the magnets. Last statement is an uneducated guess. If anyone has any ideas I would welcome any ideas at this point..........Thanks, Jamey

Tractor was running fine when it was positive ground but wasn't charging, so I rewired..........see yesterdays post for more.

JMOR · Jun 28, 2009

(quoted from post at 19:16:50 06/28/09) Ok so I worked on this tractor all day with no good end result. Still have starter grounding out some how. I checked to make sure starter wasn't stuck on flywheel by rocking back and forth while in gear. Unbolted starter and actually took it apart to make sure nothing was grounding out that shouldn't be. Brushes were a pain getting back were needed to be. Everything seems to be ok with starter. Put it back together and same issue. Entire starter is grounded........even terminal post lead. Kinda is a problem when silenoid is positive from battery on 1 side and negative from starter on the other. Push starter button and melt down.............I am lost and can't figure out why terminal on starter is grounded out. Their is an insulator around terminal and it seems ok and stud is not making contact with case, but brushes are screwed to case and appear to be connected with windings around the magnets. Last statement is an uneducated guess. If anyone has any ideas I would welcome any ideas at this point..........Thanks, Jamey

Tractor was running fine when it was positive ground but wasn't charging, so I rewired..........see yesterdays post for more.

You are not going to want to hear this, but .........while you had the starter apart would have been an excellent time to apply voltage from stud to case, as at that point (armature/brushes removed, it there were a short from the stud or from either field or from the two insulated brush holders to the case, you would have detected that & perhaps isolated to one or the other. See circuit.

B384 · Jun 28, 2009

So your telling me that 2 of the brushes are grounded and their could be a short internally between brushes?

JMOR · Jun 28, 2009

(quoted from post at 20:03:03 06/28/09)
So your telling me that 2 of the brushes are grounded and their could be a short internally between brushes?

he two brushes marked with a negative sign (-) are supposed to be insulated from the case/housing. The two with a positive sign (+) are grounded to the case (no insulator).
So, what I'm suggesting is that maybe the insulator on one or both insulated brush holders or the brush leads could have possibly failed. Also, while in this disassembled state, you can verify that there is no failure in the insulator for the big power stud and in either of the field coil windings.
Use a battery, bulb and connect to housing & the other end to points a,b,c & if any light , either a field coil, power stud, or insulated brush holders have failed insulation and are shorting to housing. Don't overlook the possibility that the short, if at power stud, only occurs when you tighten the nut.

2N wiring issue

B384

New User

JMOR

Well-known Member

B384

New User

JMOR

Well-known Member

Similar threads