I was recently lucky enough to get my hands on a “display only” 3rd Rail B&O Q-4B. The item is in fantastic shape, but the running components and boards in the tender need some TLC. I was able to figure out that the engine needs a new sound board and possibly a new speaker.
However the motor and drive system are something I have never dealt with before. Basically when the engine starts to move it makes a horrible grinding, squeaking noise. Before running the engine I did lubricate all of the moving parts and the gear box that was under the locomotive. The sound seems to be coming from the motor or the drive belt assembly but I cannot figure out which one. Possibly something with the worm gear? Any help would be greatly appreciated! I will try to add a video later regarding the issue.