Aggregates Manager

August 2014

Aggregates Manager Digital Magazine

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Page 17 of 43

Supply by Therese Dunphy, Editor-in-Chief AGGREGATES MANAGER August 2014 16 READY FOR THE LONG HAUL Manufacturers focus on fuel efficiency, safety, ease of maintenance, and operator insights when updating models. Robust and reliable, new Volvo A25G and A30G articulated haulers have powerful, tur- bocharged six-cylinder Volvo engines. The Volvo drivetrain and a unique inline dropbox designed for high ground clearance are purpose-built to ensure perfect harmony and optimized performance. The drivetrain's unique design delivers high rimpull, lowers fuel consumption, and provides reliability in heavy-duty applications. Oil-cooled wet multiple disc brakes reduce maintenance costs and increase uptime, even on muddy or dusty jobsites. The retardation system controls downhill hauling speeds using wheel brakes and the Volvo engine brake. To keep the G-Series sure-footed in the most demanding jobsites, automatic traction control (ATC) and unique differential locks are standard. Volvo Construction Equipment | Komatsu America Corp.'s HD785-7 truck is said to deliver fast acceleration and high travel speeds with a maximum gross vehicle weight of 360,253 pounds. Its turbo-charged Komatsu SAAS12V140E-3 engine meets Tier 4 interim emission standards and has a maximum net output of 1,178 horsepower. Komatsu's variable horsepower control system selects an appropriate mode based on working conditions. It detects if the truck is loaded and selects the optimum horsepower setting. The truck has two speed reverse gears: one for normal operation and the other for job sites with steep conditions. The unit is also equipped with an anti-pitching four-wheel oil-cooled multiple disc retarder that applies retarding force on all four wheels. Komatsu America | Doosan Infracore Construction Equipment offers the DA40 articulated dump truck. An agile undercarriage, designed to ensure that all six wheels are in permanent contact with the ground, means that it can operate on rough or soft terrain. Powered by a six-cylinder Tier 4 interim com- pliant diesel engine with net output of 490 horsepower, the unit offers an 11-percent increase in engine power compared to the previous model. It also boasts a 28-percent increase in gross torque to 1,750 foot-pounds. Contributing to an 8-percent reduction in fuel consumption is the new transmission offering eight forward and four reverse speeds. The transmission is said to improve the transfer of power from the engine to the wheels for outstanding traction. The truck has top operating speeds of 34.2 mph and a body capacity of 34 cubic yards. The payload is rated at 48.5 tons. Doosan Infracore | High rimpull for heavy-duty applications Quick pickup and travel speeds Higher torque, lower fuel consumption

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