Rock to Road

Equipment Roads & Bridges
Terex Officially Launches CR662RM Roadmix Paver


May 2, 2012
By Andrew Macklin


Topics

cr662-t4iMay 2nd,
2012, Oklahoma City, Okla. – Powered by the field-proven Cummins QSB6.7 turbocharged
diesel engine, the new Terex CR662RM RoadMix material transfer vehicle and
paver meets stringent Tier 4i (Stage III B) emissions standards. Offering the
same 260 hp (191 kW) output as the previous model, the machine’s new power unit
is 5% more fuel efficient to extend operating intervals between tank refills.

cr662-t4iMay 2nd,
2012, Oklahoma City, Okla. – Powered by the field-proven Cummins QSB6.7 turbocharged
diesel engine, the new Terex CR662RM RoadMix material transfer vehicle and
paver meets stringent Tier 4i (Stage III B) emissions standards. Offering the
same 260 hp (191 kW) output as the previous model, the machine’s new power unit
is 5% more fuel efficient to extend operating intervals between tank refills.

 

Advertisment

The
engine features a cooled Exhaust Gas Recirculation (EGR) system with Diesel
Oxidation Catalyst (DOC) and Diesel Particulate Filter (DPF) to substantially
reduce emissions. Regeneration of the DPF occurs automatically without
affecting machine performance. A new cooling system arrangement features larger
radiator core size and improved airflow to increase ambient operating
temperatures to 120° Fahrenheit (48.9° Celsius).

 

To offset
increased space requirements of the Tier 4i engine components, Terex engineers
developed a new low-profile hood design that slopes downward away from the
operator to improve working visibility of the hopper. The radiator is
integrated into the hood design, so the cleanest air possible is drawn for
cooling engine components, so the machine runs cooler. Components from the
paver’s fume recovery system have been moved from underneath the operator’s
platform to under the hood, lowering operating noise levels and improving
operator comfort.

 

Measured
at 320 x 240 pixels, a new, high resolution display with backlit screen and
15-bit color makes it easy for operators to see the display. This large display
helps to alert operators of underlying issues with machine performance, and the
system expands diagnostic capabilities over previous models. It also includes
setup and calibration screens for use in configuring and calibrating the
machine performance. 

 

The Terex
CR662RM RoadMix is the only machine available today that maximizes utilization
rates by operating both as a material transfer vehicle (MTV) and paver. Machine
design allows contractors to quickly switch between the machine’s conveyor
system and screed within a matter of hours. When equipped as an MTV, the
CR662RM delivers continuous, non-contact and off-set paving capabilities with
its swiveling conveyor that swings 55º to the left or right of center.

 

As a
paver, the CR662RM features two, 5-ft (1524-mm) long spread auger sections that
are driven by two independent variable-speed outboard motors, which eliminate
the center gearbox drive to reduce the occurrences of centerline segregation. Contractors
can equip the CR662RM with one of three different screed models – the diesel or
electric Terex® Fastach® 10, electric Terex®
VersaScreed, and the electric or diesel Terex® Stretch 20®.
This 10-ft (3.0 m) paver delivers mainline paving widths reaching 30 ft (9.1 m)
at depths of up to 12 in (305 mm).

 

Delivering
fast truck exchanges, the CR662RM RoadMix’s variable-pitch in-hopper auger
design offers high material throughput. Pitch spacing – transitioning from 10
in (254 mm) in the front to 11 in (279 mm) and then to 12 in (305 mm) in the
rear – aggressively channels material to the rear of the machine. This auger design
helps to boost production capabilities – up to 900 tons per hour (816 tonnes
per hour) when equipped as a paver and in excess of 500 tons per hour (454
tonnes per hour) as an MTV. Combined with the aggressive pitch, the auger’s
constant-diameter continues to reblend 100 percent of the material to virtually
eliminate material and thermal segregation.

 

Whether
equipped as a paver or an MTV, the CR662RM features the patented Terex®
Smartracrubber track drive system for more reliable operation.
Oscillating bogie wheel assemblies combine with the system’s frictionally
driven rubber tracks to automatically apply the correct tension, whether moving
forward or in reverse. The self-tensioning system does not over tension the
track, significantly extending its life. The rubber track drive spreads the
machine’s 53,000 lb (24,040 kg) over a wide area, resulting in a low ground
contact pressure of less than 12 PSI. This eliminates parking and bridge-crossing
issues common with conventional wheel-driven transfer vehicles.