Here's the thing: I know almost nothing about giant machinery and what it can or can't do.
What I do know is that giant excavators stay on the ground. That's the whole point of them! They scoop out dirt and debris from the ground. Someone decided that sticking to the ground wasn't good enough, though, because they went ahead and built a special ladder built specifically for a Liebherr excavator to climb. Here's what happened when they tried it.