KOMATSU GD505A-2 MOTOR GRADERS

Technical Description

The KOMATSU GD505A-2 motor grader is a medium-sized construction machine engineered for precision grading and earthmoving tasks. It is powered by a turbocharged Komatsu S6D105-1 diesel engine with a displacement of 396 cubic inches, delivering a maximum power output of 130 hp (97 kW) and torque of 345 lb-ft, optimized for gears 5-6. The grader features a robust hydroshift transmission with 6 forward and 6 reverse gears, capable of speeds up to 27 mph forward and 28 mph in reverse, enabling versatile operation across various terrain. The machine’s blade system includes a 12.2-ft wide moldboard with a thickness of 0.8 in and a maximum cutting depth of 19.9 in, supported by a blade base of 8.4 ft. The circle mechanism achieves a maximum lift of 17 in and reaches a maximum of 80.8 in outside the left tires and 78.8 in on the right, facilitating precise material handling. Dimensionally, the GD505A-2 measures 26 ft in overall length, 7.7 ft in width over tires, and 9.2 ft in height to the top of the Iso-mount cab, offering a tandem axle wheelbase of 5 ft and total wheelbase of 19 ft. Ground clearances include 1.9 ft at the front and 1.2 ft at the rear, accommodating rough terrain. The front axle allows 30 degrees total oscillation and 20 degrees wheel lean for enhanced stability and maneuverability, with a turning radius of 21.7 ft. Operating weight totals approximately 24,000 lbs, distributed 6,525.7 lbs on the front axle and 17,460.7 lbs on the rear. Tire size is 13.00-24-8PR, ensuring traction and durability. This motor grader balances power, control, and versatility for construction, road maintenance, and grading projects.