Crane with attachments:
Wercking ball
Tree Grapple
Clam shell bucket for deep mines.

Steam roller

Paving truck for road building

Just had an idea on the crane wrecking ball...
as long as the ball is going in a single direction (left or right) then it is gaining " momentum " untill it hits something or changes directions..
This momentum is directly related to the power of an "explosion" like effect that actuall breaks the blocks when it hits... when it hits the momentum is rest to 0 or if it changes directions (left or right) then resets to 0. This could work !