Hi, bought a new Tt dcc ready loco a few weeks ago. I ran it in half hr in each direction. Then I went to run it one mourning and it runs half a revolution and stops. I then change direction the same thing happens. I tried to take the body off to see if I can see what’s rong ,but it would not come off. I got the back loose but could not get the front to lift the body off. I didn’t want to force it. Could you advise me what to do. Kind regards. John.p