Roy, I'm not exactly sure what happened, but my theory is that the grease that was on the gears got old and started to harden, thus damaging the gear. When I took the locomotive apart, the motor's worm gear was almost completely submerged in thick grease which had turned green. I've removed almost all of the old grease, and I plan on doing a more thorough cleaning before I put in the new gear, so hopefully this doesn't happen again. Jon, I had a feeling that the gear I was looking at was for standard gauge. I'm glad I didn't buy it right away! I contacted Midge about this a while ago, but I don't think I ever got a response. I'll definitely contact her again, now that I have a better understanding of what to do.
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