CATERPILLAR 120H MOTOR GRADERS

Technical Description

The Caterpillar 120H is a versatile motor grader powered by a turbocharged 6-cylinder Caterpillar 3116 DITA diesel engine displacing 402.8 cubic inches, delivering 125 horsepower in lower gears and 140 horsepower in gears 4-8 at 2000 rpm. The machine measures 27.1 feet overall length with an 8.1-foot width over tires and stands 10.3 feet to the top of its Isomount cab, operating at a gross vehicle weight of approximately 27,880 pounds. The 12-foot moldboard features a 60.3-inch diameter circle with full 360-degree rotation capability and 40-degree front blade tip angle, providing maximum reach of 75.3 inches outside the right tire. An 8-speed direct-drive powershift transmission enables maximum forward speed of 26.5 mph and reverse speed of 21 mph with a 23.7-foot turning radius. The hydraulic system utilizes an axial piston pump delivering 39.1 gallons per minute at 3500 psi relief pressure, generating moldboard blade pull of 23,503 pounds at maximum weight. Operating specifications include a 50-amp alternator, 24-volt electrical system, and fluid capacities of 18 gallons for hydraulics, 6.1 gallons for oil, and 10.6 gallons for cooling. The front axle features 32 degrees total oscillation with 2-foot ground clearance, while the moldboard can achieve maximum 30.6-inch depth of cut with 24.1-inch height and 0.9-inch thickness. This grader combines productivity with durability through its matched Caterpillar components and load-sensing hydraulics for reliable performance in road construction and maintenance applications.