The C15 engine provides a gross power (SAE J1995) of 407 kW (546 hp). The combination of large displacement and high torque allow the RM500B to propel through the toughest materials. The engine meets US EPA Tier 4 Final and EU Stage V emission standards.

Every Tier 4 Final / Stage V Cat engine is equipped with a combination of proven electronic, fuel, air and aftertreatment components. Applying proven technologies systematically lets us meet our customer's high expectations for productivity, fuel efficiency, reliability and service life.

The cooling fan is reversible and automatically performs periodic cycles in reverse to clean the heat exchanger by expelling accumulated dust. This allows the system to cool more efficiently, ensuring optimal engine performance.

Four propel pumps provide separate, dedicated flow to all four drive motors. Provides superior tractive effort in soft underfoot conditions.

Load sensing system controlled by the ECM, matches propel speed to load on the engine.

Two speed ranges allow the machine to operate at either maximum torque to propel the machine through the toughest conditions, or a faster speed for moving around the job site.

Infinitely variable machine speeds determined by the propel lever and speed control buttons on the keypad.

Iso-mounted cab reduces vibration and is pressurized to maximize comfort by keeping noise, dust and the elements out.

The following features further enhance operator comfort: 1) Heating/air conditioning controls. 2) Left and right access doors. 3) Rotating heated cloth seat with integrated controls. 4) Sound absorbing headliner. 5) Tinted glass. 6) Windshield wipers. 7) Cushioned floor mat. 8) Dual front mounted speakers. 9) Radio-ready mount. 10) Heavy-duty isolation mounts.

Additional operator comforts include two cup holders and a 12-volt power receptacle. The cab is also radio-ready and includes a power converter, antenna with cable, two speakers and a headliner location for mounting radio.

The cab provides exceptional visibility to the front tire edge, mixing chamber and to the rear wheels.

Cab slides left and right and can be positioned to maximize visibility.

Comfortable and durable seat has an integrated mini handwheel steering control and a control console with LCD touchscreen display and propel joystick. Seat and side control console rotates 180 degrees to enhance operator comfort. Seat is heated to provide greater comfort in cold operating conditions. A seatbelt is standard.

The control console is integrated with the operator's seat and offers fingertip access to controls regardless of how the seat is positioned. An integrated touchscreen LCD display provides machine operational data, diagnostics and can alert the operator to potential problems. A backlit keypad provides well-defined controls even in poor light conditions. The propel lever houses convenient rotor control buttons so the operator can focus on work rather than look for the proper button to push.

Remote cameras on the front and rear of the machine provide live video to a display unit mounted to the dashboard. The video enhances visibility for the operator to the front and rear of the machine. An optional third camera is available to provide views to the rear of the mixing chamber.

The touchscreen LCD Display provides clear instrumentation and basic diagnostics, alerting the operator to potential performance issues. The screens are easy to understand and intuitive to navigate.

The RM500B is steered with a mini handwheel control integrated with the left armrest of the operator's seat. The control is comfortable to grip and offers effortless, precise control of the machine.

The propel lever is located on the control console integrated with the right arm rest of the operator's seat. Easing the propel lever forward from the neutral position increases speed in the forward direction; moving rearward from neutral increases speed in the reverse direction. The lever has six thumb control buttons that provide convenient control of rotor functions.

Reliable field-proven technology provides maximum productivity and simplifies troubleshooting.

Electronic Control Modules (ECM) receive input signals from sensors in the engine, propel, steering and rotor drive systems which monitor current operating conditions.

Self-diagnostics provide information for troubleshooting and alerts the operator about potential system problems.

Automatic load control adjusts propel speed so that engine speed does not drop below 1900 rpm. Machine always works at peak efficiency for maximum output.

Automatic rotor depth control provides consistent quality and performance.

A Cat powershift transmission drives the rotor and is sized to handle tough cutting and deep mixing.

Heavy-duty gear reducers with four planetary carriers provide excellent rotor drive reliability.

Rugged drive chains provide efficient, continuous power to the rotor. Single strand heavy-duty chain resists breakage.

Three rotor speeds for maximum performance in a variety of materials and cutting depths. First speed is used primarily for pulverizing the material. Second and third rotor speeds can be used as blending or mixing passes.

High capacity rotor driveshafts and maintenance-free universal joints.

Heavy-duty shear disc or optional torque limiter protects rotor drive components from torsional stress and shocks loads.

Mixing chamber allows the rotor to move independently so that the capacity of the chamber actually increases in deeper cuts to allow better material mixing.

Mid-machine rotor uses total machine weight to help keep rotor steady in the cut for uniform depth control.

Bi-directional mixing capability increases machine efficiency.

Large heavy-duty breaker bars help achieve uniform sizing.

Hydraulically adjustable rear door for optimum control of gradation and material uniformity.

Hydraulically adjustable front door allows more precise sizing control when operating in the reverse direction.

Side access doors enable quick and simple replacement of cutting tools on rotor ends.

Hydraulically operated front door allows the operator to control the opening of the front door from the operator's station.

Dual hydraulic cylinders offer increased lifting force and precise control of the front door.

The front door raises parallel to the cutting surface to prevent the door from plowing material in harsh soil stabilization conditions.

Forward or reverse operation increases machine versatility in soil stabilization.

Visual site gauge on rotor hood displays door position and allows the operator to precisely control the opening of the front door.