The updated 834G Wheel Dozer features a Cat 3456 engine with Electronic Unit Injection (EUI). The engine is Tier 2 compliant and delivers 481 net horsepower and 49 percent torque rise. The 103,849-pound machine maintains its high-efficiency hydraulic system, durable structures, low-effort electro-hydraulic controls and comfortable operator's station. A new, sculptured engine block provides greater strength, reduced weight, and lower sound levels, Cat says. The engine control system, ADEM III, comes with a programmable monitoring system and is said to be faster, more versatile and more reliable than its predecessor. Three Cat blades are available for the dozer.