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Btw, my understanding of how the Kenmore motor alters speed is that it is switched between series and parallel operation at the speed selector switch.  This alters the voltage to the motor.  At low speed the motor only receives half the voltage it receives at high speed.  There are only one set of field windings in the motor itself.  It is an unusual motor in that the lead from one of the brushes, the black wire, goes right to the ground side of the on-off switch and not to a field winding as is the case with the lead from the opposite brush.


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