KOMATSU GD655-5 MOTOR GRADERS

Technical Description

The Komatsu GD655-5 is a heavy-duty motor grader powered by a Komatsu SAA6D107E-1 diesel engine, producing 218.6 net horsepower at 2,100 rpm with 694 lb-ft of torque. This water-cooled, turbocharged, 6-cylinder engine features direct injection and air-to-air aftercooling, displacing 408.3 cubic inches (6.69 liters) with a 4.3-inch bore and 4.9-inch stroke. The machine operates at a total weight of 40,829.7 pounds, with 11,841.1 pounds on the front axle and 28,990.8 pounds on the rear tandem. The moldboard measures 12.2 feet wide by 25.4 inches high with 0.9-inch thickness, capable of lifting 1.6 feet above ground and reaching 6.6 feet outside the rear tires. Its overall length spans 34.7 feet with a 24.3-foot minimum turning radius and 60.3-inch circle diameter. The fuel tank holds 109.9 gallons of diesel, supplemented by separate capacities for cooling system (6.6 gallons), transmission (11.9 gallons), tandem housing (15.1 gallons), and final drive (4.5 gallons). Featuring a dual-mode powershift transmission with anti-stall technology, the grader offers both standard power mode and eco mode for fuel efficiency. The front axle provides 32 degrees oscillation and 20-degree wheel lean, while the frame maintains 2.1-foot ground clearance. The hydraulic system operates with closed-center load-sensing technology enabling simultaneous circuit operation independent of engine speed, with a hydraulic cooling fan that adjusts based on engine load and temperature.