Yes, it's a diesel 'Sante Fe' model. 
Thanks, I'll check all the track connections.  Maybe one is loose that I didn't notice.  Sure would be easier than having to send in the engine and wait for it's return.

I bought a HO set for my Grandson just before Christmas, with extra EZ-Track.  The set doesn't have barely 3 hours total usage.  Yesterday the engine started moving very erratically, and barely at all.  As I look at the exploded diagram of the engine, (Sante Fe motive) it appears that both the front and rear sets of wheels propel the engine.  Is this correct?
When I set the train on the tracks with the front wheels and turn up the reostat, only the rear wheels move.  I hear something from the front end, but the wheels do not turn.

Could someone please give me some assistance.  I have contacted Bachman service.  It just irritates me that something with this few of hours, I will now not have the use of, nor my grandson, for who knows how long.

Thanks and sorry for the rant.

Scourge.