By Lori Lovely
Cat is launching two new built-from-scratch models of reclaimer/stabilizers: the RM600 and the RM800.
According to Mark Eiden, Cat’s Global Sales Consultant, the introduction gives the brand the widest selection of choices in this equipment category.
“This is the result of a long validation, and of listening to the voice of the customer,” he said, estimating 10,000 hours of validation.
The goals of the two new machines include performance, ease of maintenance and operator comfort.
Both models rely on the Cat C18 engine. The 600 features a single turbo and can produce 17 per cent more power than the RM500B, while the 800 has twin turbos and produces 23 per cent more power than the RM600.
By using cool air, the cooling system maximizes fuel efficiency. Reversible cooling fans enhance efficiency, clean the heat exchangers and extend maintenance intervals.
Cutting tools deliver the desired material sizing. A bolt-on paddle toolholder can be configured on the rotor for reclamation applications or switched out for a wedge for soil stabilization.
A hydraulically actuated floating rear rotor chamber door allows the operator to select the appropriate down pressure, and the door can be opened if a lot of material is in the chamber.
Automatic load control maintains rotor mixing depth and machine speed to deliver the accurate mix quality.
Depth indicators on the side and the front leg enable a ground person to guide the leading edge of the rotor. The new models can cut 2.4 metres wide and 50 cm deep.
Cat operator expereince
Operator comfort begins with a new cab and easy-to-learn controls with the latest technology. In addition to the user-friendly controls, the cab provides heat and air-conditioning as well as optimized sightlines with floor-to-ceiling glass, including an angled pane on the right side that provides a clear view to the leading edge of the cutting chamber. Sightlines are further enhanced by the full left-to-right sliding cab, which not only improves productivity, but also augments safety.
Operators will appreciate the heated air-ride suspension seat with 180-degree positioning. A 25-cm colour touchscreen display positioned in the headliner comes standard, with an auxiliary display near the armrest. To increase visibility even more, configurable front and rear-mounted cameras are standard, with optional side-mounted cameras.
Controls are grouped by function, with a mini wheel on the armrest replacing a central steering wheel to clear sightlines.
“The creature comforts are ergonomic for greater productivity,” said Scott Reynolds, CEO of ARS Companies, one of the Cat customers who helped validate the machines during field testing.
Designed for full-depth reclamation and stabilization projects, both Tier 4 Final machines provide stability through front-to-rear weight distribution and constant traction. Four independent columns provide machine levelling and raise the height of the chassis for convenient maintenance or cross-slope cutting.
A belt-driven rotor drive system helps handle heavier cuts. The rotors have no pins, fasteners or setscrews to fuss with. Added weight over the rotor improves stability.
Both the RM600 and RM800 include four steering modes (rear-wheel, front-wheel, crab and coordinated) to aid maneuverability, while wheels at each corner permit the machines to make the tightest of turning radii. Electronically controlled all-wheel drive assists traction and mobility.
Dual hookups are located at the front of the machines for a spray system to dispense water and bitumen emulsion. Eiden explained they’re “very accurate at low flow rates.” In addition to having self-cleaning nozzles, they are available in manual or automatic mode, and can be set up for any mix design: by volume, area or by a percentage of soil density.
Maintenance made easy
Cat promises extended service intervals with the RM600 and RM800. For example, an auto-reversing cooling fan that prevents debris build-up contributes to longer service intervals.
When maintenance is required, convenient access points make it easier. A hood opens for walk-in access. Service doors on each side of the rotor chamber allow access for inspection or changing without reaching inside the rotor chamber. Hydraulically powered turning with a control pendant allows the rotor to be cleaned and the bits replaced.
A standard compressed air system that can power pneumatic tools has two access points, which speeds up rotor bit changes. Controls adjust to allow the operator to exit at ground level and raise for bit service. A rear safety switch has lock-out functions to allow work to proceed safely while the engine’s running. An optional high-pressure wash system enables quick cleanup.
Both machines come with built-in diagnostics to monitor performance and provide troubleshooting information for remote diagnosis.
Having acquired the equipment line in the late 1950s, Cat has a “long design history,” that Eiden believes these new models build upon