The enormous contraption is a Mercedes-Benz mounted concrete pump, complete with a huge three stage extending boom that’s capable of servicing an entire constructions site*. This superb Technic version has been built by Ivan_M and it uses just a single motor to power a vast array of Technic functionality.
Thanks to a gearbox that single Power Functions motor drives everything from the extension of all four outriggers as well as their lowering, all three stages of the concrete pump’s boom extension (via pneumatics), plus the rotation of the boom arm.
The functions don’t stop there either, as Ivan_M has also included several mechanical features, including working steering with Ackerman geometry on the front two axles, all-wheel suspension, and a V8 piston engine under the tilting cab.
There’s much more of this remarkable creation to see on both Flickr and Eurobricks, where there’s also a video available demonstrating the truck’s functions with instructions to follow. Get pumped via the links above!
*Just like your Mom.