Hi everyone, apologize in advance if this topic has been discussed. My son and I are new to the hobby and there is a lot to learn.

I recently purchased a new old stock Centennial engine (item no. 62018) which has DCC onboard. We are running the engine on bachmann ez track using the bachmann dc power pack. The engine was working well for the 1st couple of runs. However, the wheels have recently started locking up. Sometimes the front set other times the rear wheels depending on the direction on the dc controller. The engine powers on with lights and I hear the motor humming. The train can not make it around our small layout without coming to a complete stop. It's a small layout (4x8) and I'm using 22 degree curves. Doesn't seem to be a traction issue as when I press slightly down on the engine it still doesn't go forward. Also doesn't seem to be a track power issue as my voltage tester lights up strongly around the engine.

I assume I am doing something wrong. Do I need to upgrade to a dcc controller to use this engine? Or could this be an issue with the motor itself not getting enough power.

Any tips/ help would be greatly appreciated.

Thanks.
Nick