JOHN DEERE 772 MOTOR GRADERS

Technical Description

The 1985 John Deere 772 Motor Grader is a robust, articulated-frame machine engineered for heavy-duty grading applications. With a base machine weight of approximately 31,548 lbs and a gross weight of 35,970 lbs, its typically equipped operating weight ranges from 36,640 to 38,338 lbs, depending on configuration. The machine features a Cat C7.1 engine, a 6-cylinder, 7.01 L (427.8 in³) diesel unit with a 4.1 in (105 mm) bore and 5.3 in (135 mm) stroke, delivering 176–196 hp (147 kW) at 2200 rpm and a maximum torque of 616 lb-ft (835 N·m) with a 40% torque rise. The transmission offers 6 forward and 3 reverse gears, providing versatile speed control. Steering is precise, with a 47.5° maximum front steering angle and a 20° frame articulation angle left or right. The front axle provides 18° lean and 32° oscillation for enhanced stability on uneven terrain. Ground clearance at the center is about 24.1 in (612 mm), and the top forward speed is approximately 14.9 mph, measured at 2250 rpm with 14.00R24 tires and no slip. The blade is available in 12 ft or 14 ft (144 in or 168 in) lengths, with a thickness of about 0.75 in (20 mm). The hydraulic system delivers around 24,150 kPa (3500 psi), supporting efficient blade operation. The machine is rated for ambient temperatures up to 122 °F (50 °C) and features a 24V electrical system with alternator options of 115 or 150 amps.