CATERPILLAR 120M MOTOR GRADERS

Technical Description

The Caterpillar 120M Motor Grader is a robust, versatile machine engineered for precision grading and earthmoving tasks. Powered by a Cat C6.6 ACERT engine, it delivers 138 hp (103 kW) at 2,000 rpm, with a maximum torque of 690 lb-ft and a displacement of 403 cu in. The engine meets U.S. EPA Tier 3/EU Stage IIIA emissions standards and features a VHP Plus range of 103–136 kW (138–182 hp), with no derating required up to 11,500 ft altitude. The direct drive, power shift, countershaft transmission provides 8 forward and 6 reverse gears, ensuring optimal power delivery and control. The 12 ft moldboard offers a maximum depth of cut of 28.3 in and a maximum lift above ground of 16.8 in, with a blade tip range of 40° forward and 5° backward. The machine’s hydraulic system is electro-hydraulic load sensing, closed center, with a maximum system pressure of 3,500 psi and a pump flow of 40 gpm. The 120M features a wheelbase of 19.4 ft, an overall length of 27.9 ft, and a width over tires of 8.2 ft. It has a standard operating weight of 31,069 lbs and a maximum gross vehicle weight of 48,601 lbs. The advanced braking system includes multiple oil-disc service brakes and a dual circuit control system. The 120M is equipped with a programmable autoshift option, electronic throttle control, and optional advanced control joysticks for enhanced operator comfort and productivity. Safety features include electrical disconnect and hydraulic safety systems, meeting ISO 3450:1996 and ISO 3471:1992 standards.