JOHN DEERE 770D MOTOR GRADERS

Technical Description

The John Deere 770D Motor Grader is a high-performance, articulated machine designed for precision grading and heavy-duty earthmoving. Powered by a 6-cylinder, 494 cu in turbocharged engine with air-to-air aftercooler, it delivers up to 215 hp (160 kW) at 2000 rpm and peak torque of 902 lb-ft at 1000 rpm in higher gears. The Powershift transmission offers 8 forward and 8 reverse gears, with direct drive for smooth, efficient operation and a maximum speed of 25.9 mph in both directions. Hydraulic system features a variable-displacement piston pump with 54.7 gpm flow and 2750 psi relief valve pressure, supporting all-hydraulic blade and machine controls. The 12.1 ft moldboard provides a blade pull of 28,990 lbs at max weight, with a 360° rotating circle, 42° front and 5° rear tip angles, and 18.6 in max lift. Circle diameter is 59.9 in, with 31 in left and 28.6 in right shift. The articulated frame steering system allows a 22° articulation angle and 23 ft turning radius for superior maneuverability. Standard operating weight is 32,670 lbs, with a maximum operating weight of 47,999.1 lbs. The machine measures 28.9 ft in length, 8.3 ft in width, and 10.5 ft in height to the top of the Isomount cab, with a 20.1 ft wheelbase and 5.1 ft tandem axle wheelbase. Fuel capacity is 106 gal, and the hydraulic system holds 14 gal. The 770D is equipped with 14.00R24 radial tires and a robust hydraulic setup for demanding grading applications.