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Reply to "Seeking advice concerning removal of the cable from the Pantera windshield wiper motor"

I think the purpose of the screw on top of the motor housing is to adjust the position of the rotor commutator in relation to the carbon brushes. I had the same prob with one of my radiator fan motor. If not adjusted correctly the brushes will rub (and wear out) against the small studs which contact the commutator fields with the windings.

 

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