Doosan DL450 wheel loader has been upgraded to a 354-horsepower Tier 4-Interim engine, which will provide up to 16 percent greater fuel efficiency than its predecessor 300-horsepower power plant, according to the company. Operating weight is 56,329 pounds, breakout force is 52,864 pounds, and full-turn tipping capacity is 41,667 pounds. Optional hydraulic locking differential provides increased driving power when one wheel spins or loses traction. It can be locked manually or automatically.