The Cat 18M3 motor grader is a new model and has 5 percent more power in each gear compared to the Cat 16M3. The grader has an 18-foot moldboard compared to the smaller grader’s 16-footer, which enables it to grade at 8 degrees and reduce blade loading.
The 18M3 is powered by a Tier 4-Final Cat C13 ACERT engine with variable horsepower to match power with operating situation. ECO mode limits engine speed to 1,900 rpm in working gears during light to moderate load applications.
The direct drive, power shift transmission has eight forward and six reverse gears. The Advanced Productivity Electronic Control Strategy (APECS) system allows for smooth shifting and extend component life. The heavy-duty modular trans-axle has a standard automatic differential lock that engages and disengages as required.
The hydraulic brakes use large discs and pistons to provide a high dynamic braking torque, and a new manual brake wear indicator simplifies disc wear measurement, eliminating the need to remove the brake pods to check wear.
The front frame is fabricated of continuous top and bottom plates, and the center-shift section is a heavy-duty steel casting that effectively distributes stress in this highly loaded area of the mainframe. The long rear frame uses two bumper castings and thick hitch plates for long term durability. The front axle is designed for extended cylinder bearing life. Standard equipment for the 18M3 includes a ripper and front counterweight.
The load-sensing hydraulic system with Proportional Priority Pressure Compensating electrohydraulic valves provides precise implement control and continuously matches hydraulic flow and pressure to power demands for added fuel savings and reduced heat generation.
The full color, touch-screen display allows monitoring machine performance, setting operating parameters (such as blade-lift modulation), and accessing service information for initial troubleshooting. The display shows Grade Control Cross Slope readings, DEF (diesel exhaust fluid) level, and information pertinent to daily operation. The Advanced-Control joysticks allow easy control of the Grade Control Cross Slope or AccuGrade systems, and a keypad with lighted, one-touch buttons simplifies operation.
The standard rearview camera system provides images on the new information display or on an optional LCD screen above the rearview mirror. Also standard are the speed-sensitive steering and a seat belt indicator, which alerts the operator that the belt is not fastened and records the incident as a fault code.
Cat 18M3 Motor Grader Specifications
- Engine: Cat C13 ACERT
- Net power range: 304-357 horsepower
- Operating weight: 74,300 pounds
- Moldboard width: 18 feet