Yes, I wonder what the risks are to a
FEL in trying to dig in hard soil. We have very heavy clay here and I have to really work at it to dig with the
FEL or even a demo skid steer (smooth buckets on both).
Personally, I've settled on doing the digging with the mini-excavator and either moving with the excavator blade or with the loader bucket. In the current project, I'm digging out a hillside about 7' high.
As I mentioned in another post, the clay is so hard that even a 20,000# bulldozer blade is gliding over it rather than digging
That's why we don't have earthquakes here, they can't penetrate this soil (just kidding, we do carry earthquake insurance).
Ken