Steam Loco 290 hums

[phillyreading]

Are you sure it is the engine that hums? The direction unit or E unit is in the tender on the American Flyer engines that I have. I have the 293 & 295 steam engines. Also when cleaning and servicing the brushes the spring tension is very important, make sure the brushes make a good contact or the engine will stall.

[TrainLarry]

This is an American Flyer locomotive. You may need to disassemble the motor and clean and lubricate it, and clean and lubricate the gears.

Larry

[skippygp123]

I just bought a used set which includes a 4-6-2 Steam Loco #290. The locomotive hums when it runs. What could be causing this? Thanks! Ed