CATERPILLAR 12F MOTOR GRADERS

Technical Description

The 1972 Caterpillar 12F Motor Grader is a robust, mechanically controlled machine designed for heavy-duty grading and earthmoving tasks. Equipped with an EROPS (Enclosed ROPS) cab, it offers operator protection and comfort. The grader is powered by a Caterpillar diesel engine, with base net power around 176 hp, and features a 6 forward / 3 reverse gear transmission for reliable control. Hydraulic output pressure reaches approximately 3500 psi, supporting efficient blade and ripper operation. The machine boasts a maximum front steering angle of 47.5° and a frame steering angle of 20° left or right, with a front axle lean angle of 18° and oscillation of 32° for enhanced maneuverability. Operating weight is about 44,613 lb, and the moldboard measures 12 ft in length, 24 in in height, and 7/8 in in thickness, with side shift capabilities of up to 26.1 in left and 20.2 in right. The blade tip cylinder allows for a maximum forward angle of 40° and 5° backward, while the circle drive enables full 360° blade rotation. Maximum lift above ground is 18.9 in, and throat clearance is 4.4 in. The ripper, available as an option, provides a maximum ripping depth of up to 17.1 in with 3 to 5 shanks and adjustable spacing. Maximum machine length increases by about 46.1 in with the ripper raised, and ground clearance at the center is approximately 24 in. Top forward speed reaches 26 mph, supported by a variable piston hydraulic pump with a flow rate up to 55.7 gal/min. The fuel tank holds about 100 gal, and the engine displacement is 7.01 L (427.8 cu in), with a bore of 4.1 in and stroke of 5.3 in. The parking brake is hydraulic actuated, ensuring secure slope holding.