Look at the latest creation by Coney. A Caterpillar 584 Forwarder.
See where all the functions included in this model are, from the picture below.
The arm can be extended in and out and the claw is rotated by a micro motor. The front blade is operated manually by a power function switch located in the cab. It also has working suspension on both the tractor and the trailer.
- 4x PF IR Receivers
- 1x PF Switch
- 3x PF XL-Motors
- 7x PF M-Motors
- 1x 9V Micro Motor
- 2x Mini Linear Actuators
- 7x Pneumatic Cylinders
- 4x Small Pneumatic Pumps
- ...and some auto-valves, based on Sariel's design
You may find some more detailed pictures, at Coney's BS folder.
Just wish the next LEGO Technic Unimog (8110), would have the same amount of functions in its crane arm.
This is a great example of something only possible to do if we combine gearing and pneumatics to the same set of functions.