JOHN DEERE 770BH MOTOR GRADERS

Technical Description

The John Deere 770BH Motor Grader is a robust production-class machine designed for demanding grading applications. It features a 6-cylinder John Deere 6076A turbocharged diesel engine with a displacement of 466.1 cu in, delivering 155 hp at 2200 rpm in gears 1-3 and 162 hp in gears 4-6, with peak torque at 1100 rpm. The grader is equipped with a direct drive, planetary power shift transmission offering 8 forward and 4 reverse gears, enabling smooth on-the-go speed changes and a top forward speed of 25.3 mph. The hydraulic system utilizes a closed center variable displacement pump with a flow rate of 52.4 gpm, supporting efficient blade and circle operations. The circle provides a 59.1 in diameter, 360-degree rotation, and a maximum lift of 18.6 in above ground, with a front blade tip angle of 49 degrees and rear angle of 5 degrees. The moldboard measures 12.1 ft in length and 24.1 in in height, with 26.9 in side shift capability in both directions. The machine has an overall length of 28 ft, a wheelbase of 19.6 ft, and a tandem axle wheelbase of 5.1 ft. Standard operating weight is 31,300 lbs, distributed with 8,700 lbs on the front axle and 22,600 lbs on the rear. The grader is fitted with 13.00-24 tires, a 24-volt electrical system, and a 50-amp alternator. The articulated steering system allows a 25-degree articulation angle and a 22 ft turning radius, while the front axle offers 32 degrees of oscillation and 20 degrees of wheel lean. Fluid capacities include 89.9 gal for fuel, 10.1 gal for cooling, 23 gal for transmission, and 5 gal each for tandem case fluid.