KOMATSU GD655 MOTOR GRADERS

Technical Description

The 2020 Komatsu GD655 motor grader is powered by a Caterpillar C9 turbocharged 6-cylinder engine, delivering net power between 145 hp (gears 4-6) and 165 hp (gears 7-8), with an optional 185 hp VHP Plus setting for gears 7-8. It produces a peak torque of 682 Nm at 1200 rpm, with a displacement of 537 cubic inches and a rated speed of 2000 RPM. The transmission features a direct-drive power shift with 8 forward and 6 reverse gears, supporting forward speeds from 2.1 to 17 mph and reverse speeds up to 21.6 mph. The machine maintains a tight turning radius of 24.25 feet with a 20° articulation angle left and right, and steering range of 50°. Dimensionally, it measures 28.12 feet in length, 8 feet in width over tires, with a wheelbase of 19.97 feet. The low-profile cab height is 122 inches, rising to 131 inches for the high-profile cab. The base gross vehicle weight is 31,320 pounds, distributed as 8,346 pounds on the front axle and 22,974 pounds on the rear. The 12-foot moldboard blade offers a 90° maximum positioning angle, 40° forward and 5° backward tip range, a lift height of 19 inches, and a cutting depth up to 29 inches. Shoulder reach extends to 78 inches on the right and 75 inches on the left. Hydraulic systems provide a flow of 51.9 gallons per minute at 3,500 psi with a 100-gallon capacity. Braking uses air-actuated multiple oil disc brakes covering 3,712 square inches of service brake area. Standard tires are 14.00-24 12PR, with optional 17.5 R25 tires. Electrical power is supplied by a 24V system at 75 amps, and the fuel tank holds 19.5 gallons. The front axle clearance is 23.75 inches, allowing for good maneuverability and terrain handling.