JOHN DEERE JD770 MOTOR GRADERS

Technical Description

The John Deere JD770 is a heavy-duty motor grader powered by a turbocharged 6-cylinder diesel engine displacing 531 cubic inches, delivering 142 net horsepower at 2200 rpm and 440 foot-pounds of torque at 1400 rpm. This machine measures 27.8 feet in overall length with an 8.1-foot width over tires and features a 12-foot moldboard with 0.9-inch thickness capable of 26.9 inches of side shift in both directions and 360-degree rotation. The transmission system comprises eight forward and four reverse gears via power shift technology, enabling maximum speeds of 25.1 mph forward and 8.6 mph reverse, with a turning radius of 22.1 feet. The hydraulic system utilizes a closed-center variable-displacement pump delivering 57 gallons per minute at 2250 psi relief pressure, operating a 59.1-inch diameter circle with 17.1 inches maximum lift above ground. Standard operating weight totals 29,845 pounds (8,220 pounds front axle, 21,625 pounds rear axle), with maximum operating weight reaching 33,559 pounds. The machine features articulated frame steering with 25-degree articulation and front axle oscillation of 30 degrees total, combined with 1.9 feet front ground clearance. Fluid capacities include 70-gallon fuel tank, 31-gallon hydraulic system, 10-gallon cooling system, and 5.5-gallon oil capacity. Operating at 24 volts, the JD770 rides on 14.00-24 tires and represents a versatile grading platform designed for road construction and maintenance applications.