I believe the 785 was the first of the post war Hudsons to have open spoke drivers. Mine had a problem with axle end swedging (?) so that one of the drivers even fell off the axle. A trip to Lionel corrected that and I’ve had a lot of good run time with this engine. I would check wheel tightness, gauge, and even quartering in case a drive wheel may have been off its axle.
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