Have a MTH 20-2557-1 that works fine via DCS. Wanted to grease and oil them, sine it has not been used for years if ever. The main works fine in the cradle, but when the slave is plugged into the main, there is no movement in the slave, lights in the slave work fine. The main unit still works when the slave is plugged in. I have other MTH ABA units where the slave works fine in a cradle.
Am I correct that if the slave unit was dead, the main unit could not pull it, it would be too much of a drag. They run fine slow via DCS, forward and backwards. Any ideas would be appreciated.