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Grounded Field Brushes

  1. Place one test lead of a self-powered test light to each field brush and remaining lead against brush holder. One set of brush holders is grounded 180 degrees apart. Test light should activate on these brushes.
  2. Repeat procedure on remaining brushes. On these insulated brush holders, test light should not activate. If test light is activated on insulated brush holders, brush holders and plate are grounded. Replace brush holder plate assembly.
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