CATERPILLAR 12HNA MOTOR GRADERS

Technical Description

The 2007 Caterpillar 12HNA Motor Grader is a mid-size construction machine featuring a 12-foot moldboard width and wheel steering with hydraulic power assist. The grader offers eight forward gears and six reverse gears, enabling maximum forward speeds of approximately 24.7 mph and reverse speeds around 19.7 mph. Its articulation system provides 20-degree steering angles with 18-degree front wheel lean and 32-degree total oscillation on the front axle, facilitating precise directional control and moldboard positioning. The moldboard delivers full range positioning with blade tip angles of 40 degrees forward and 5 degrees backward, supporting comprehensive grading applications. Equipped with a Caterpillar 3306 turbocharged diesel engine, the machine produces 140 horsepower in gears 1-3 and 165 horsepower in gears 4-8, operating at 2000 rpm. The hydraulic system operates at 3500 psi with variable piston pump technology, delivering approximately 51.8 gallons per minute for efficient blade and control operations. The machine measures 28.12 feet in overall length, 8.01 feet in width over tires, and stands 10.21 feet to the top of the cab, with a wheelbase of 19.99 feet. Operating weight reaches approximately 31,409 pounds fully equipped. Standard features include a direct-drive power-shift transmission, sealed compartment wheel bearings, and replaceable metallic wear inserts on the moldboard, ensuring durability and low maintenance in demanding construction and road-building environments.