I'm pretty sure that "ORIGINAL" O gauge, 3 rail Hornby tinplate trains run on DC current only.
The new Ace Trains and modern replica's have a switch for Ac or DC.
I run many different prewar European trains in 3 rail gauge 1 and O gauge. They will not even move an inch on AC power. They only hum loudly. And running on AC may damage the motor.
And I will add that I think they had it right across the pond! My old prewar DC trains run so smoothly, and will run at lower speeds than a train like a Lionel 262E or 260E does on AC.
Try a DC transformer, or buy a AC to DC rectifier. I remember going through all of this back when I put in a loop of 3 rail gauge 1 to my layout and caught the "European Bug".
And there are Marklin transformers that are AC and NOT DC too for what, I'm not sure (maybe lights). I ended up installing a large "Frankenstein Looking" rectifier with big cooling fins to a large old Marklin AC transformer. Looks cool for prewar trains.
And I may be totally wrong about your loco or you might be talking about DC and I didn't see it. So some of the other Euro Tinplaters might chime in too. But I would stop running it on AC current if you are.
Bill
