Chuck Sartor posted:On the UCS track, opposite control rails should be hot and ground. Sounds like your track and or controller are wired wrong. Should operate like the 3459 dump car and the 3451 log dump car. And any version milk car.
I agree with Chuck. I have a few Postwar operating merchandise car, and they work just like the operating dump cars and milk cars.
They spit out the little brown boxes when the unload button is pressed (without any uncoupling), and they uncouple when the uncouple button is pressed (without any unloading).
In a couple of minutes, I will post a video on the Unit train thread showing box cars, including merchandise cars and milk cars. Arnold
