I have a lionel burro crane that I can't figure out how to fix. When I first got it about two years ago, it would just short out when power was applied. After I got it repaired at an authorized service station, I found that, while it would not short out, it would barely move, even with full power. I thought that this could be because of a stripped gear, so I took it apart to have a look. The gears looked ok, so I put it back together only to have the original short circuit problem again. The motor works fine on its own, but when it is in contact with the frame, it shorts out. I'm really confused by this, because all of my engines with pullmor motors have the exterior of the motors in contact with the frame in some way. Is this a common problem with the burro crane or pullmor motors in general? Could I have reassembled the unit incorrectly?
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