2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 405Get this manual

2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 405

ELECTRICAL 3Remove brush plate and brushesMeasure length of brushes and replace if worn past the service limitReplace springs
brush housingNOTE: Be sure that the terminal bolt insulating washer is properly seated in the housing, and the tab on the
brush plate engages the notch in the brush plate housing4Measure the resistance between each commutator segment and the armature
shaftThe reading should be infinite (no continuity) 2Place wrap of electrical tape on the threads of the terminal bolt to
prevent O-Ring damage during reinstallation3Install the O-Ring over the boltMake sure the O-ring is fully seated4Remove the
electrical tape and reinstall the two small phenolic washers, the large phenolic washer, flat washer, and nut 5Check commutator
bars for discolorationBars discolored in pairs indicate shorted coils, requiring replacement of the starter motor6Place armature
in growlerTurn growler on and position hacksaw blade or feeler gauge lengthwise 18" (.3 cm) above armature coil laminatesRotate