I just had the same problem...... **** smoke unit motors! Just took it apart and put a drop of oil on the motor shaft, all good. I used some mobile 1 I had from the car, just to get fancy , I'll see if stays quiet for 10,000 miles
We'll see how long it lasts. If it does it again, I'll replace it, what stinks about that is, a new one could fail just the same.
NOTE: I thought possibly flooded the smoke unit, stack smoke wasn't great and I kept adding 5-6 drops here or there trying NOT to flood it. whistle smoke has been good all along.
After opening it up the wicking was BONE DRY. Lionel is not kidding in the manual when it recommends 20 drops on the first fill, it could probably take 30. The smoke unit reservior is rather deep on these so theres plenty of room for fluid. It smokes, like crazy on the lowest setting now and matches the volume of the whistle.
THANKS DANIEL FOR THE PICTURES ON JOHNS THREAD! This wasn't horrible to open, plenty of room for the wires, and theres alot of slack in the stack smoke unit so its not even necessary to unplug it when repairing.
I did however find a fiber washer sitting on top of the gearbox, I could not find anywhere near where it was sitting that it would go other than as a gasket for a screw on top of the gearbox ? One screw was recessed a bit for a washer and looked like an upper grease port. If it was for the shell or something I should have had 2 or 4. I suppose it was just sloppyness by the builder (nah couldn't be) . Loco runs fine, no issues so I'll hang onto the washer for the parts bin.