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Pre-crushes RAP The
ACE Group’s Rapwrangler eliminates the need for off-site pre-crushing of
large asphalt chunks. Powered by either a 30- or 50-horsepower TEFC motor,
the unit has a 20-inch rotor with 312 replaceable tungsten-tipped teeth that
shred football-sized chunks of asphalt down to 1 inch at a rate of 250 tons
per hour. The rotor is fed from a 30- by 40-inch hopper and it produces a
product suitable for introduction into drum mix or batch plants for final
sizing.
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Faster on the job
 John
Deere has added two new wheeled excavators to its line of earthmoving
equipment. The 121-horsepower 180C W weighs 41,500 pounds, while the
147-horsepower 210C W weighs 45,400 pounds.
Both employ the same one-work-mode hydraulic system
used on the company’s crawler excavators.
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New track loaders
 Case
introduced its first line of compact track loaders in March. The
74-horsepower 445CT and the 82-horsepower 450CT offer lift capacities of
3,500 and 3,857 pounds, respectively. The 445CT features vertical lift
loader-arm geometry for optimum lifting and placing efficiency, while the
450CT employs a radial-arm configuration for high-production digging and
fast load cycle times. The chassis for both come from Case’s 400-series
skid-steer line, while the undercarriages are said to incorporate long-life
features from Case dozer and excavator designs.
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Highway-class 8-foot pavers
 Ingersoll
Rand introduced a new series of 8-foot
highway-class pavers at Conexpo-Con/Agg 2005. The wheel-mounted 5160 and 5170 represent a fusion of technology from IR’s
European and North American paver franchises. The pavers
have a 13.6-ton
hopper, a 185-horsepower engine, and a 30kW generator. New features for this
series include an auger system that operates independently of the conveyor
system, and the use of sonic sensors in both systems to provide precise
material handling. The conveyor system has automatically tensioned chains
for consistent performance and lower maintenance costs.
Ingersoll
Rand says its new hydrostatic
direct-traction drive system for the pavers reduces maintenance costs by
eliminating 70% of all mechanical drivetrain components.
The
wheel-mounted 5160 and 5170 employ a patented front wheel suspension design
for uniform wheel loading.
A variety of screed options are available for the
new pavers, including the company’s new Genesis series, a vibratory design
with front-mounted extensions. Other options include a vibratory
rear-extension design, and single- or double- tamping-bar configurations.
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Wheel excavators updated
Caterpillar
has issued a series of improvements for its four-model line of wheel-mounted
excavators to boost performance, productivity, serviceability, and operator
comfort. Along with new drivetrains, the line gets joystick steering in
first gear, proportional hydraulics for work tool control, and adjustable
hydraulic sensitivity for quickly adapting the machine to different tasks.
New options include offset variable angle booms for working in tight areas,
and industrial sticks for material handling jobs.
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Rotary mixer handles
more
 Caterpillar’s
new 350-horsepower RM-300 Rotary Mixer can handle full depth reclamation and
soil stabilization, and features a sliding operators station, pressurized
cab, and two rotor options. Other options include four-mode steering,
automatic depth control, and a rear wheel-assist feature which adds a
separate hydraulic pump to drive the rear wheels. Equipped with the rear
wheel assist, larger rear tires, and the universal rotor, the new machine
can handle difficult applications that require maximum depth stabilization
high in liquid stabilizing agents such as lime slurry.
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Job-mobile crushing and
screening
 Metso
Minerals has introduced the track-mounted Lokotrack LT200HP crushing
plant and Locotrack ST352 screening plant to provide mobile crushing and
screening operations on a job site or in a quarry. Designed for secondary
and fine crushing, the 425-horsepower LT200HP features a Nordberg HP200 cone
crusher and can process up to 275 tons per hour and is said to produce a
highly cubical product. The ST352 features the company’s SmartScreen
technology for monitoring and managing production.
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Deep tread tires
Bridgestone Firestone calls its new Bridgestone M850
radial a deep-tread on/off highway tire designed to provide long tread life
for flatbed haulers, dumps, and other applications involving hauling to and
from construction sites. Along with its deep 24/32-inch tread pattern, the
M850 uses a specially designed block/rib tread pattern to avoid the
excessive heel-and-toe wear experienced with other on/off-highway tires.
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Power on wheels
International
calls its truck-mounted Diamond Logic PowerPack 3 generator system pure
power on wheels. The patented 3000-watt power system is a factory installed
option on medium-duty and severe service vehicles. International says the
option virtually eliminates the potential for generator theft, and is more
reliable and easier to maintain than most add-on generators.
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Short-swing excavators debut
 Volvo
Construction Equipment has launched a four-model line of short-swing
compact excavators for operators working in restricted-space job sites,
including highway and bridge work.
The new machines have a uniquely designed
swing-system rear frame and counterweight, according to Volvo. The line
ranges in size from the 19-horsepower, 6,000-pound ECR28 to the
59-horsepower, 18,000-pound ECR88. All four feature load-sensing hydraulics,
quiet operator cabs with 360-degree visibility, and a fuel-saving auto-idle
system.
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Advanced dozers
John Deere
has rolled out the J-series versions of its 115-horsepower 700,
145-horsepower 750, and 185-horsepower 850 crawler dozers. Like the smaller
J-series dozers, the new models are designed for flexible machine
configurations, to meet the specific needs of the customer. Features include
Deere’s proprietary dual-path hydrostatic drive, long-interval maintenance
cycles, and redesigned operator stations. The company claims both models
deliver more horsepower than competing models in low ground pressure
configurations.
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GPS-enabled system for
excavators
Novariant says its new
Logic7D Excavate system designed to boost the productivity of excavators by
providing real-time positioning of the machine’s bucket teeth. The system
displays the grade and location of the bucket without the need for survey
stakes. In addition, excavation can continue when a survey crew is not
available, at night or in blinding conditions. The system is powered by the
company’s new 7DDuo GPS Receiver, a dual-antenna roof array that determines
position and orientation of the machine, and a rugged touch-screen display
that was specifically designed for the construction environment. The system
also links a series of sensors through a controller area network bus to
compute the position of the bucket teeth with pinpoint accuracy. With this
information overlaid on plan maps and design data, the equipment operator
can control the bucket based on real-time cut/fill, slope location, and
depth information.
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New earthmover radial
Michelin developed the new X-Super Terrain AD radial
tire to deliver long service life mounted on articulated haulers, scrapers,
and loaders. The company says the tire features deep tread and durable
rubber compound, as well as rugged shoulder and sidewall design. Michelin
describes the tread design as aggressive and self cleaning, and claims the
tire enhances ride comfort by reducing vibrations.
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New player in the 7-yard loader
class
John Deere has
entered the 7-yard-loader class with the all-new 844J. Designed and
manufactured by Deere, the machine features a 12.5-liter, 380-horsepower
(net) engine with wet sleeve cylinder liners for enhanced cooling. The
company claims the 844J has best-in-class cooling and maintenance access to
cooling apparatus. The 69,300-pound machine also features a smooth-shifting
proprietary transmission, a ride control system, excavator-style hydraulics,
and an optional joystick steering control system.
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Smaller ejector truck
After introducing dozens of new models in the months
leading up to ConExpo-Con/Agg,
Caterpillar
used the show itself to launch a 31-ton version of its ejector-body
articulated hauler. The 317-horsepower, 730 Ejector has a 22.1-cubic-yard
body capacity and uses a self-cleaning ejector mechanism to spread and dump
material on the go, without raising the body. It has the features of the
conventional 730 Articulated Truck, while the ejector technology
incorporates features from Cat’s 769D off-highway truck and its wheel
scrapers.
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New commercial paver
Mauldin’s new 60-horsepower 1550-C Paver features
the company’s Freedom-Four Screed with a patented extension matching system
and a four-auger material feed system with extendible augers. The
track-mounted machine weighs 12,500 pounds and has a 6.5-ton hopper; it has
a two-speed drive system. The 8-foot Freedom-Four screed extends to 13 feet
with heated screed extensions.
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New heavy trucks
 Kenworth
has introduced four new Class 8 trucks, including the T800 which is aimed at
the construction and aggregates markets.
The company touts multiplexed electronic
instrumentation, world-class fit and finish, and increased driver comfort as
the hallmark of the new trucks. Some 25 new standard features have been
added to the vehicles, many of which used to be options.
A new front engine power take-off option is now
available on the short-hood T800 for applications like snow plows and
transit mixers.
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Reprinted from Better Roads Magazine May 2005 |
