hey....i am new to this site. I have been looking for answers everywhere but keep hitting dead ends. Hopefully someone here can help me. I have a bachmann silver series e-z track system pioneer HO scale train set. it has been in the box for sometime now and when i set it up, the engine isnt working like it should. I dont know too much about model trains, but i have set this one up before and had no problems with it. Now when i put the engine on the track and turn the power on, the engine budges forward a tiny bit but then stops. i can hear the moter humming like it wants to go but cant. my busband took the plastic shell off and everything inside LOOKS ok. when i put the engine on the track with out the shell on it and turn it on, i can see the (forgive me for this... i dont know what the parts are called) little brass weight looking things trying to turn. i cant figure out why it wont keep going. the brass piece turns easily when i spin it with my finger, so its not stuck on anything. the light on the front shines bright too.  im sure most everyone here knows more about this than i do. i reallly love this set and would love to see it running. ANY AND ALL help and advice is genuinely appreciated