By Adam FreillConstruction Equipment
Cat RM600 and RM800 reclaimer/stabilizers are engineered to handle full-depth reclamation and soil stabilization projects. The machines, which are equipped with turbocharged Cat C18 engines, feature an adjustable height design capable of cross-slope cutting.
Both models adopt key rotor system components from the company’s cold planers for cutting and mixing. Featuring a belt-driven rotor drive system, the machine is capable of flush-cutting on the right side. New System K rotors use the same cold planer fastener-free, dual-taper toolholder and base block components. Exit and return-to-cut features aim to simplify operation, saving time and ensuring the machine maintains a consistent depth of cut.
Two configurations are available for the Cat C18 engine to meet regional emissions requirements. Its cooling system uses cool air intake to maximize fuel efficiency and reduce emissions. Allowing the system to cool more efficiently to extend cleaning and maintenance intervals, automatic cooling fans periodically cycle in reverse to clean the heat exchangers. A single Electronic Control Module (ECM) monitors engine performance and provides diagnostics to the operator.
The manufacturer says front-to-rear weight distribution has been optimized for stability in tough cuts, and standard electronically controlled all-wheel drive maximizes traction and mobility. Four height adjustable legs provide up to 14 per cent (8 degrees) of slope on either side when working on uneven terrain or to maintain traction in challenging soil stabilization applications.
Two high-tensile, six-rib belts with automatic tensioning prevent slippage, while the rotor drive features a hydraulically actuated, heavy-duty clutch that does not require adjustment. Abrasion-resistant, high-strength alloys of the System K rotor are designed to withstand tough, high-power applications, and the cutting tools are strategically placed to deliver ideal material sizing and homogeneous mixing results. The versatile rotor can be configured with bolt-on paddle toolholder protection for full-depth reclamation applications or wedge protection to reduce drag for full-depth reclamation soil stabilization applications.
The two models are engineered to offer the power and performance to efficiently cut 2,438 mm (96 in) wide at up to 508 mm (20 in) deep. Advanced electronic controls plus automatic load control maintain rotor mixing depth and optimum machine speed to deliver ideal mix quality. Adjusting the front and rear mixing chamber doors enables instant modification of material gradation, and an easy-to-read indicator on the touchscreen display informs the operator of door positions. A rear rotor chamber door float feature simplifies operation by allowing the operator to select the desired down pressure. RM600 and RM800 also offer bi-directional cutting capability.
Wheel positioning at the corners lends to a highly maneuverable reclaimer/stabilizer design. The machines can navigate a 3.1-m (10.1-ft) inside turning radius. The machines have four steering modes: front only, rear only, crab and coordinated.
Water and emulsion spray systems are available. The emulsion system features self-cleaning nozzles and is designed to deliver water as well as bitumen emulsion. Computerized metering delivers accurate application rates with variable flow rates of 30 to 1,900 L/min (8 to 500 gal/min) for water and 30 to 850 L/min (8 to 225 gal/min) for emulsion to meet site needs. The operator controls additive flow and customizes spray width from inside the cab.
Machine controls are grouped by function. A small handwheel provides precise steering, while the operator matches machine speed and functions to gradation specification via a 10-inch colour touchscreen display and pushbutton controls.
Hydraulically sliding side-to-side, the cab is positioned to enhance visibility to the front and sides of the machine. Floor-to-ceiling glass and an angle pane on the right-hand side provide a clear view to the work ahead and the leading edge of the cutting chamber. The cab’s fully pressurized design with air conditioning and heater/defroster provides a comfortable environment for the operator while keeping noise, dust and the elements out.
Standard and optional cameras augment performance and safety for the RM600 and RM800. Two standard cameras mounted above the front and rear mixing chamber doors give operators visibility to obstructions and material gradation. Optional side-mount cameras provide views to each side of the machine.