I picked up an American Flyer 310 Steam Locomotve at an antique store. Had missing parts and I found some on ebay. I don't really colect SGage, but after all this is an circa 1946 Amrican made product and I had to restore it. Anyway wen I run this engine, the large wheels from the engine seem to be shorting out the. Are there insulators that need to be replaced? The power is picked up from the coal car. It does run soemwhat, but lots of sparks from the front weels.