CATERPILLAR 120M AWD MOTOR GRADERS

Technical Description

The 2009 Caterpillar 120M AWD Motor Grader is a mid-size construction machine equipped with a Cat C13 engine delivering 238 horsepower at 1,850 rpm, producing 1,137 lb-ft of maximum torque with a 41% torque rise characteristic. The engine features six cylinders with 5.1-inch bore and 6.2-inch stroke, displacing 763 cubic inches (12.5 liters). Operating at 12,930 hours, this unit features an enclosed cab control system and carries a 14-foot moldboard with maximum cutting depth of approximately 23 inches. The machine weighs approximately 57,250 pounds when typically equipped, distributed across front and rear axles for optimal load balance. All-wheel-drive capability enhances traction and grading precision across varied terrain. The grader achieves forward speeds to 31.4 mph and reverse speeds to 24.8 mph, with front axle steering angles ranging 18-20 degrees enabling tight turning radius of approximately 24 feet. Hydraulic systems provide blade positioning with 40-degree maximum forward angle and 5-degree backward angle, supported by a circle diameter of 71.7 inches for versatile moldboard articulation. Ground clearance at center measures approximately 24 inches. Overall dimensions approximate 33 feet in length, 7 feet 11 inches in width, and 10 feet 11 inches in height. The machine configuration prioritizes operator comfort through spacious cab design with adjustable suspension seat and comprehensive HVAC systems, while power-shift countershaft transmission with eight forward and six reverse gears optimizes productivity across diverse grading applications.