JOHN DEERE 770C MOTOR GRADERS

Technical Description

The John Deere 770C Motor Grader is a robust, heavy-duty machine engineered for precision grading and earthmoving tasks. Powered by a turbocharged and aftercooled John Deere 6081H diesel engine, it delivers 155 horsepower at 2,000 rpm and 549 lb-ft of torque at 900 rpm, ensuring strong performance across demanding applications. The 6-cylinder engine is paired with an 8-speed forward and reverse power shift transmission, allowing for smooth gear changes and a top speed of 25.8 mph in both directions. The hydraulic system features a closed-center variable displacement pump with a flow rate of 54.7 gpm and a relief valve pressure of 2,550 psi, providing responsive and reliable control for the blade and other implements. The 770C’s blade circle offers a 360-degree rotation, with a 59.9-inch diameter and a front blade tip angle of 49 degrees, rear tip angle of 5 degrees, and a maximum lift of 18.6 inches. The moldboard is 12 feet wide, 24 inches high, and 0.9 inches thick, with a side shift of 26.9 inches in each direction. The machine’s articulated steering system provides a 25-degree articulation angle and a 22-foot turning radius, enhancing maneuverability in tight spaces. With a standard operating weight of 31,300 lbs and a maximum operating weight of 36,030 lbs, the 770C is built for stability and traction. The front axle offers 32 degrees of oscillation and 20 degrees of wheel lean, while the tandem axle wheelbase is 5.1 feet. The 770C is equipped with a 106-gallon fuel tank, 15.6-gallon hydraulic system capacity, and 24-volt electrical system, making it well-suited for extended operation in a variety of environments.