Top 25 Rollouts of 2011
Liebherr claims its R 9100 mining excavator sets new standards for productivity, reliability, and cost efficiency in the 100-ton class. The excavator’s V12 engine has an output of 565 kW (757 horsepower). The specially shaped 6.8-cubic-meter bucket increases penetrating power and fill factor. A wide catwalk makes access to the various mechanical assemblies easy. Other features include an operating weight of 110,100 to 114,000 kilograms, a machine monitoring and control system, and a new cab design.
Six-wheel drive with torque distribution
Cat’s 740B articulated truck offers a Tier 4-Interim-certified emissions configuration and 43.5-ton payload capacity. The improved cab features a redesigned instrument cluster and customizable, multi-purpose display; a new headliner with switches for electric mirrors and regeneration operations; an upgraded driver’s seat with multiple position adjustments; and an engine hood raise switch. Cat has improved its six-wheel-drive system with a torque-distribution, automatic traction control (ATC) system, which is said to eliminate the need for driver intervention to maintain traction in difficult operating conditions.
More even footprint pressure
The 45/65-45 DuraLoad off-road loader tire from Bridgestone stands out with features such as a flatter crown radius for more even footprint pressure and less heat generation. The tire’s design includes shoulder tie bars and is said to allow easier mounting. The tire will be available in L4, L5, and L5S designs to fit the needs of most loader operations, with or without chains.
Komatsu says its HM300-3 articulated truck features a Tier 4-Interim, 325-horsepower engine; a gross vehicle weight of 115,147 pounds; and a payload capacity of 31 tons. The truck’s Komatsu Traction Control System (KTCS) automatically engages to maintain performance in soft ground conditions. A new cab design provides good visibility and easy access to machine controls. Complimentary factory-scheduled maintenance for 2,000 hours or three years comes standard with every lease or purchase.
Longer tread life
Michelin’s XDR2 tire for rigid dump trucks is said to offer up to 20 percent more tread life than its predecessor, the XDR. In addition to increased tread life, the tire features up to a 10-percent thicker undertread between the protective plies and tread base for better cut and impact resistance. Other features include a self-cleaning tread pattern, full-depth blocks, a 13-percent-larger central lug (compared to the XDR), a non-directional design to provide increased protection against aggressions and cut separations, an evolving tread design that provides an increased contact patch as the tire wears, sculptured cooling vents to help keep running temperatures low, and Michelin’s C2 Technology in the casing to provide an overall cooler operating temperature.
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