CATERPILLAR 12H MOTOR GRADERS

Technical Description

The Caterpillar 12H Motor Grader is a robust, versatile machine designed for demanding grading applications in construction and infrastructure projects. Powered by a six-cylinder, 637.7 cu in diesel engine, it delivers 145 hp in lower gears and 165 hp in higher gears at 2000 rpm, ensuring strong performance across varied terrains. The grader features a direct drive power shift transmission with eight forward and six reverse gears, providing precise control and smooth operation. Its 12.1 ft moldboard offers a maximum depth of cut of 28.9 in and a blade down pressure of 23,808 lbs, with side shift capabilities of 20.6 in left and 26 in right. The circle system allows 360° rotation, with a diameter of 60.2 in, and blade tip angles of 40° front and 5° rear. The machine’s overall length is 28.2 ft, width over tires is 8.1 ft, and height to the top of the Isomount cab is 10.3 ft. With a maximum operating weight of 45,818 lbs, the 12H provides excellent stability and traction. The hydraulic system operates at a relief valve pressure of 3500 psi, supporting efficient blade control. Front and rear ground clearances are 2 ft and 1.2 ft, respectively, and the tandem axle wheelbase is 5 ft. The turning radius is 24.3 ft, and the front axle offers 32° oscillation and 18° wheel lean. Fluid capacities include 11.6 gal for cooling, 7.2 gal for oil, and 16.9 gal per tandem case. The 12H is engineered for durability, precision, and operator comfort in heavy-duty grading environments.