Lionel Chief + just stops running

Sounds similar to a problem I had on a Flyer Chief diesel engine, turned out to be a cold solder joint on the motor

Ray

Does it happen at the same spot on the track or does it happen randomly anywhere ?

What kind of track are you using ?

My locomotive would generally stop entering the curved section of track, for mine it was a left hand curved track.

Ray

Thanks - I was hoping the OP would also chime in.

Ok, super o track.  It seems like same two spots at differentars times, different run sessions.    Eng has two motors - both cut off.

It sounds like you might have a small dead spot in the track from a short, loss of connectivity or voltage loss.

I'd measure voltage along the track to make sure it is consistent, especially at those two spots. You may need to tighten or re-set the track and/or add a power drop(s).

I purchased a Lionel Chief  4-6-6-4 that did not run. The can motor mounting screw loosened to the point the gears did not mesh anymore. Tightened both can motor mounting screws and it runs great.

Thanks for the reply’s.   I checked the track with VOM.   Found to be low 6.5.

luckily I checked transformer.     Low output.   Replaced - runs fine now.