Powerful non-hydraulic Excavator from italy?

[steamer]

Here's another link for the model. If you look real close in the picture you can see the gear motor at the top of the cylinder. The cylinder down tube would cover an internal threaded cyl rod. The rod is fastened solid at the bottom so it can't turn. All we have to do is just figure out what thread there using
http://www.coolthings.com/ec280mg-rc-excavator/