Hey guys, I want to introduce my latest MOC: The hydraulic slewing crane “T 157/1” – a crane (or rather an excavator or “loader”) that was developed and built in the former GDR. Actually, the machine is quite ugly, but somehow it fascinated me and I had to build it in LEGO® Technic.
That's the real excavator (and it's really ugly …):
The excavator is completely mechanical or pneumatic and of course fully functional. Therefore it drives, steers and excavates. The challenges during construction were on the one hand the really limited space (of course I wanted to accommodate all functions) and on the other hand the unusual construction of the front axle. The latter also cost me a few evenings and many tests. Also for the tires at the front I had to come up with something. LEGO® doesn't have suitable wheels in its range. The solution: I mounted the balloon tyres 68.8×40 on the Technic 43.2×26 rim, which was actually too small. And lo and behold, it worked and looks great. Also the construction was very fiddly due to the limited space. So the pneumatic pump had to find place underneath the excavator as well as the turning wheel for the rotating construction of the excavator. But in the end it fitted.
Thanks to the new pneumatic valves, I was able to build real joysticks. Therefore: Each of the sticks in the "cockpit" really controls the functions of the model. And even if it was tight, there was enough room for a few details like V-belt, tank and exhaust.
Finally my excavator in action: