Long overdue cleaned up version of the 210 ton dozer with its pusher. This concept that originally was created back in 2005 was heavily influenced by the CAT Quad D9 developed by Peterson Engineering back in 1964.  Lift arms on the rear dozer unit that connect to the lead dozer are now on the inside of the track frames as it should be. The hydraulics that control these lift arms can be set to float. If the hydraulics push down on these lift arms, it gives the lead dozer more traction in the rear part of the lead dozer's track frames. If the hydraulics pull up on the lift arms, it gives the lead dozer's blade more ground breakout force.