On the reverse unit in the tender, make sure the rotating drum is clean and contact fingers are making contact with the contacts on the drum, In the engine make the brushes are making good contact with the commutator , sometimes you have take the brushes out clean them and the commutator plates , The item you have with the motor looks like Lionel whistle, if you blow into the opening you should heir a whistle sound
On the reverse unit in the tender, make sure the rotating drum is clean and contact fingers are making contact with the contacts on the drum, In the engine make the brushes are making good contact with the commutator , sometimes you have take the brushes out clean them and the commutator plates , The item you have with the motor looks like Lionel whistle, if you blow into the opening you should heir a whistle sound