CATERPILLAR 12K MOTOR GRADERS

Technical Description

The 2017 Caterpillar 12K Motor Grader is powered by a robust Cat C7 ACERT inline 6-cylinder diesel engine with 7.2 L displacement, delivering 183–213 hp (136–159 kW) at 2,000 rpm and a maximum torque of 776 lb-ft (1,052 N·m) with a 39% torque rise, suitable for high-demand grading tasks. The engine's derating altitude is 10,000 ft (3,048 m), and it operates efficiently in ambient temperatures up to 122 °F (50 °C) using a variable fan speed system that ranges from 600 to 1,650 rpm depending on conditions. This motor grader features an 8 forward and 6 reverse gear transmission, with top speeds ranging from 29.0 mph (46.6 km/h) forward to 22.9 mph (36.8 km/h) in reverse. The machine’s base weight is approximately 35,067 lb, and it includes a 12 ft (3.7 m) standard moldboard, with optional blades of 14 ft (4.3 m) and 16 ft (4.9 m) for increased grading width. The blade can rotate 360°, with a maximum tip forward angle of 40° and backward 5°, combined with side shifts of 26.1 in left and 20.2 in right for versatile blade positioning. Structural articulation allows a frame steering angle of 20°, front axle lean of 18°, and rear axle oscillation of 32°, enhancing maneuverability and ground contact on uneven terrain. The scarifier features 9 shanks spaced at 9.8 in, with a maximum working width of 84.1 in and a maximum depth of 11.1 in. The electrical system runs at 24V with 35–40 amps, and service intervals are set at 500 hours for engine oil and filter, and 4000 hours for hydraulic oil. This grader is optimized for demanding earthmoving and road maintenance applications.