Online Equipment Focus: Haul Trucks — Carrying a Heavy Load
Articulated haul trucks meet the heavy-hauling needs of aggregates operations, but they also offer something more — maneuverability.
by Kerry Clines, Senior Editor
More horsepower/ergonomic design
Case Construction Equipment says its new 327B and 330B articulated trucks feature more horsepower, an ergonomically designed cab, and a variety of service and maintenance features. The Tier III-certified, electronically controlled 10-liter engines use unit injectors to increase the pressure of fuel entering each cylinder and feature a variable geometry turbocharger to provide an optimized air-to-fuel mixture. The fully adjustable, ergonomic cab features a long, sloping hood design and a floor-to-ceiling glass door for great visibility.
K-Tec Earthmovers Inc. says its new articulated dump truck (ADT) series is compatible with its scraper’s motor unit and allows a contractor to switch a six-wheel drive ADT between material hauler and scraper power unit in a matter of hours, depending on the model. The truck offers many advantages, including high speeds, a smooth ride, fast hydraulics, tight turning radius, perfect weight balance on all three pulling axles, better floatation than motor scrapers, and accommodation for lesser-skilled operators.
Reduced noise levels
Komatsu America Corp. says its HM400-2 articulated dump truck meets EPA Tier III emission regulations and features a hydro-pneumatic front and rear suspension, two-stage lift cylinders, reliable wet multiple-disc brake retarder, and maintenance-free oscillating hitch. The truck also has reduced ambient noise levels and lead-free radiators, as well as a 29.2-cubic-yard capacity and loading height of 9 feet, 9 inches. The company’s Komtrax technology allows machine operating information — hour meter, location, cautions, maintenance alerts, and more — to be sent to a secure Web site via wireless technology.
Increased productivity, uptime
John Deere Construction Equipment’s 250D, 300D, 350D, and 400D articulated dump trucks have been enhanced to increase productivity and uptime, according to the company. Updates include the transmission, operator station improvements, electrical enhancements, and a new engine in the 250D and 300D. The company says the truck’s best-in-class engine fuel economy and payload-to-weight ratio translate to lower daily operating costs. A new monitor provides increased diagnostic capability.
Chute allows quick material ejection
Terex Construction Americas says its 450-horsepower TA40 Generation 7TA articulated off-highway truck offers high power, high torque, and Tier III-emission certified engines for maximum performance. Its dual-slope tail chute is said to allow for complete and quick material ejection. The ergonomic cab is equipped with an air-suspended, fully adjustable operator’s seat. All Generation 7 models feature tilting cabs for unrestricted access for inspection and maintenance.
Caterpillar Inc. says its 740 articulated truck features an expanded capacity of 43.5 tons, the biggest payload of all the 40-ton size class. The truck body can handle 31.4 cubic yards of material, according to the company, and features differential locks that can be engaged and disengaged on-the-go for faster cycle times in challenging conditions and on steep grades.
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