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New
Construction Trucks
 Mack
has introduced a new generation of its Granite and Granite Axle Back
truck series. The new models feature the all-new MackPower MP7
engine, an 11-liter block available in six horsepower ratings
between 325 and 405 horsepower. Hallmarks of the new engine are said
to be a significant improvement in fuel economy and “tremendous
low-end torque response.” The new trucks are built on the 116-inch
BBC Mack Cornerstone chassis. Their cabs have an extra 4 inches of
depth for more leg and belly room and to allow a seat recline angle
of more than 20 degrees. Also new: a wrap-around, cockpit style
dash, one-piece windshield, and a broadly adjustable steering column
with driver foot pedal controls suspended, rather than
floor-mounted. The pedal arrangement means the driver’s heel never
has to leave the floor when switching between fuel and brake pedals.
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Production loader debuts
 John
Deere has introduced its first entry in the 7-cubic-yard wheel
loader class. The new 844J features an electronically controlled
12.5-liter engine that develops 380 net horsepower at 1,600 rpm. It
is linked to a Deere Powershift transmission that uses the company’s
smart shift technology to continuously sense speeds and loads and to
adjust clutch pressures accordingly. The company says the result is
best-in-class shift quality. The 844J weighs 69,300 pounds and comes
with a 7.25-cubic yard standard bucket.
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Advanced hard rock scaling
 Breaker
Technology, Inc. (BTI) president Frank Cargould says his
company’s new QS45 Vibratory Pick Scaler “represents the biggest
advance in hard rock scaling in the last 40 years.” BTI says the new
scaler will double the production of a standard scaler with half the
maintenance. Its vibratory pick can be used as a standard pick, or
the integral hammer can be engaged to give extra impact energy when
needed. The unit’s purpose-built carrier has a telescopic boom with
a 45-foot reach, 330-degree boom rotation, and twin 6-inch lift
cylinders. The tilt cylinder develops 40,000 pounds of peak force to
the pick tip, and the telescoping cylinder develops 35,000 pounds of
thrust in each direction.
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Precision belt cutters
 Flexible
Steel Lacing Company (Flexco) says its 840 Series belt cutters
and its Clipper 845LD belt cutters feature new safety improvements
that protect users during and after cutting. In the new design, the
blades remain fully enclosed during cutting procedures. The blades
also feature a flat top design, providing protection from the tip
when the upper beam is opened. Following use, the blades can be
position in a protected area on either end of the cutter. The
improved models are designed to provide accurate square cuts for
belts with thickness up to 1 inch.
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Production excavator
debuts
 Link
Belt has added to its excavator line with the introduction of the
152,000-pound, 425-horsepower 700LX. The new model, also available
as 153,700-pound mass excavator, features an advanced computer
control system, a choice of four work modes, or an Auto Mode in
which the computer adjusts work modes according to load sensing
data.
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Briefs
Hybrid truck
 Mack
Trucks has worked with the U.S. Air Force to produce a prototype
hybrid electric Class 8 heavy-duty truck.
The prototype powertrain is mounted on an
Air Force R-11 refueling truck built on a Mack RD 6 by 4 chassis.
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Jig separator
Phoenix is promoting its line of jig
separators as inexpensive, state-of-the-art process technology to
economically remove deleterious, lightweight materials from gravel.
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Primary crusher
Williams engineers its Willpactor
single-rotor crushers around four rotor sizes to provide capacities
as high as 1,700 tons per hour. Feed openings are as large as 72 by
111 inches.
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Diesel engine oil
BP Lubricants has created a new
high-performance, partial synthetic diesel engine oil. Castrol
Hypuron S is said to allow extended service intervals and to provide
exceptional dispersancy to manage the higher soot levels generated
by EGR engines.
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Reprinted from Aggregates
Manager Magazine
January 2006 |
