DEERE 672B MOTOR GRADERS

Technical Description

The 1988 John Deere 672B Motor Grader features a robust Cat C9.3 6-cylinder diesel engine delivering 250 hp (186 kW) at 2,000 rpm, with a displacement of 9.3 L (567.5 in³), a 4.5 in bore, and 5.9 in stroke. It achieves a maximum torque of 656 lbf-ft with a 40% torque rise according to ISO 9249 standards. The grader utilizes an 8-forward and 6-reverse gear transmission and operates with a closed-center parallel hydraulic system, producing up to 24,192 kPa (3,505 psi) at 1,800 rpm, with flow rates up to 155 L/min (40.9 gal/min). Its 6-wheel drive system supports effective traction and mobility, with a front axle that can lean 18° left or right and oscillate by 32°. The frame steering angle is 20°, and the front wheels steer up to 47.5°. Blade controls feature a circle drive with 360° rotation, a moldboard side shift of 663 mm to the left and 512 mm to the right, and blade tip angles of 40° forward and 5° backward, allowing precise grading operations. The maximum cutting depth is 735 mm, with lift cylinders providing up to 480 mm of blade lift. The rear scarifier spans 2,137 mm wide with 9 shanks spaced at 250 mm for deep soil penetration up to 281 mm. Electrical power is supplied by a 12V system with a 1,400-amp cold cranking battery and a 115-150 amp alternator. This machine has operated for 11,068 hours, suitable for heavy-duty road and construction grading tasks where reliability, power, and hydraulic precision are critical. Ground clearance at the center is 612 mm, ensuring obstacle navigation in rough terrain. Fuel capacity is 15.8 gal, supporting extended operation cycles.