Pete that was just the last straw...the set had other problems already...the units don't run straight on the track..really weird but true...the lead A has a loud ticking sound at all times...checked rollers, gears, etc...can't eliminate it no matter what I try. And as for oiling the rollers..some say you should NEVER do that, but I would try it if that were the only problem.
I remember MTH stating that rollers should be oiled to allow better conductivity to minimize light flicker in passenger cars. From my experience, what they instruct is true. I agree with Norton. I oil all of my rollers with 3 in 1 PTFE. I think the oil has Teflon. Works for me. Put red and tacky on the gears and it should be very smooth. I do this with all of my engines and cars as I unpack them. Has not failed me yet. I hope yours comes around. Work on 1 problem at a time. I think the engines are beautiful and would hate to see an engine lose its home and obviously a passionate train collector.