What's the product number of this crane, that has the ability to move back-and-forth over the track? Can they all do that?? Thanks!
No - they cannot all do that. Mine is the Lionel Command Control Gantry Crane # 6-82097. It is designed to operate remotely through Lionel's command control system (Legacy - possibly TMCC, also). I operate mine with my Cab-2 Legacy system. There are other versions that come with a separate remote control just for the crane.
Although the crane will move forward and backward, there is nothing to guide it in place or keep it straight. You can jerry-rig your own guide system using pieces of rail, but Gargraves makes a special piece of wide track (about 36" long) with built-in rails for the crane wheels on the outside and tracks for the rolling stock on the inside. Since I run Fastrack, it has to be adapted for connection and height, but it's not difficult.
I also have the Lionel Crane Sounds Work House (# 6-82035) incorporated into the system which provides and syncs sounds to the movements of the crane.
Hope this helps !