I have a number of K-Line side dump coal and log cars. All of them no longer operate. They don't respond to an unload-uncouple track nor do they work with the K-Line remote control. Has anyone else had trouble with these cars? My Lionel and MTH cars dump their loads just fine.
Something on the control board goes bad. I have had luck in buying replacement boards from Brasseur Electric Trains. They bought out K-Lines parts department at the end......
Rolland is right, the go to is Brasseur Trains. They will either repair them for you or you can purchase the Boards!!