All three new machines use the Cat C18 ACERT meeting EPA Tier 4-Final/EU Stage IV emission standards. The high-horsepower C18, with an advanced turbo-charging and air-to-air after-cooling system, responds quickly to operating demands, keeping exhaust temperatures low and maintaining airflow for efficiency and reduced emissions.
The PM820, PM822, and PM825 are hydrostatically driven by two variable-displacement propel pumps supplying oil to a variable-displacement motor at each track. piston-type drive motors automatically control displacement, providing torque for work and speed for maneuvering.
The rotor is equipped with three-piece, quick-release tool holders and carbide-tipped cutting bits arranged in a chevron pattern for maximum breakout force. Optional rotor systems are available. The cutting chamber design facilitates material flow, reduces wear, and provides flush-cutting capability.
The conveyor belt is driven by a hydraulic motor that provides adjustable control of the loading conveyor to ensure proper discharge. A large chamber-discharge opening clears out the cutter box and effectively controls fine particles. An optional system uses a grease cylinder to adjust belt tension and tracking but a conventional adjusting-screw system also is available.
Cat Grade Control
All three can be equipped with the optional, integrated Cat Grade Control system, which is a 2D-capable/3D-ready grade-and-slope system that automatically controls a preset rotor depth and cross slope. The system can be enhanced for full 3D control with the addition of optional equipment.
The operator’s station features dual operating controls, upper-conveyor controls and rear- track steering controls. An ergonomic instrumentation layout designed for ease of use, and the touch-screen display is backlit for low-light operation, and easy-to-read gauges, function indicators, and warning indicators, as well as displaying video from optional remote cameras.
Additional options for the new cold planers include a diamond-bit cutting drum, in-board averaging ski with position-sensing cylinder, high-pressure wash-down system, bucket trays for cutter bit storage, high-capacity water-tank refilling pump, and electric refueling pump.