CATERPILLAR 120 MOTOR GRADERS

Technical Description

The 2021 Caterpillar 120 motor grader features a robust 145-amp alternator designed to support the machine's electrical demands during extended operation. This alternator capacity ensures reliable power generation for the grader's 24-volt electrical system, including starting components, lighting, and auxiliary functions. The machine is equipped with a Next Generation fuel filter system, an advanced efficiency design engineered to remove small contaminants and optimize fuel quality for the engine. Fuel antifreeze protection is effective to -13°F, enabling operation in cold weather conditions without fuel gelling issues. The 120 motor grader operates efficiently across a range of ambient temperatures up to 122°F, with a Cat C4.4 turbocharged diesel engine delivering approximately 128 to 171 horsepower depending on configuration and All-Wheel Drive activation. The grader features a 12-foot blade width with precision hydraulic control, supported by a variable displacement piston pump capable of approximately 3,500 psi system pressure. Ground clearance measures around 24 inches, accommodating diverse terrain profiles. The direct-drive powershift transmission provides eight forward speeds with a maximum travel speed of approximately 30 mph, while reverse speeds reach roughly 24 mph. Hydraulic system flow operates between 133 to 190 liters per minute depending on pump configuration, enabling responsive blade control and consistent grading precision. The machine's on-demand fan system reduces fuel consumption, while electronic throttle control matches engine power to operational requirements for optimal efficiency and performance.