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<p>[quote user="richhotrain"]</p> <div class="quote-header"> </div> <blockquote class="quote"> <div class="quote-user">BMMECNYC</div> <div class="quote-content"> <p>So as a note, I had to run a 2-56 tap through the motor mount hole.  I suspect that the coating (shiny black that Rich mentioned in his thread) ended up in the motor mount hole on my locomotive. Also the piece of metal to which the motor magnets are attached, is that engergized? Should I re-install the top screw or use a nylon one there as well?</p> <div style="clear:both;"> </div> <p> </p> </div> </blockquote> <div class="quote-footer"> </div> <p> </p> <p>As I recall the chassis and the motor mounts, I don't think that a nylon screw is necessary.  The loco is DCC Ready in that sense.  The problem has always been the grounding wire on the brush.</p> <p>Rich</p> <p>[/quote]</p> <p>I believe you are correct.  I removed the bottom brush holder from the motor (to attach the lead for the orange wire), it threads into plastic and makes no contact with the metal piece that holds the magnets for the motor.  I do not understand the recommendation to install those in your S3 topic about using a nylon screw.  The only issue I can find is the metal clip that makes contact with the frame.</p> <p>Edit:  In any case I decided to put nylon screws in both top and bottom motor mount holes, and the magnet holder is isolated from the frame on top and bottom by kapton tape.</p>
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