recently purchased this engine. Will not run. Is equiped with DCC. Motor humms, but when I turn the power off the worm gear rotates bout three times only. When turning the power on then off it will rotate the opposite direction only about three turns only. The engine will not run under normal conditions. What do you think is the problem?
Did you try running it on DC yet? It ccould be that the decoder needs reset. If it runs on DC, try resetting the decoder and see what happens.
could you have a gear bind? the worm turning about 3 turns in either direction before binding leads me to believe you have something in one of the teeth of your reduction gears. this gear will rotate only so far in either direction before whatever is in the teeth jams against another gear. look between the teeth of your gears for some sort of debris, maybe a stray piece of ballast, and remove it if you find it.