Motorized Bulldozer

The Motorized Bulldozer is a LEGO Technic Construction set for ages 11 to 16. It includes a Power Functions remote control, which controls the front blades, rear ripper, and working tracks. The Motorized Bulldozer was the winner of the 2007 Nuremberg Toy Fair Innovation Award. Maybe the set does not provide the Model B This set is similar in design to the smaller, non-powered Mini Bulldozer.

Trivia
Due to an error in the building instructions, the blade and ripper did not function properly. The fixed instructions are available here