Aggregates Manager Digital Magazine
Issue link: https://read.dmtmag.com/i/85648
by Kerry Clines, Senior Editor Supply This selection of dozers can help keep stockpiles in good order and assist with other jobs around the quarry. Komatsu America Corp. EXCEPTIONAL PRODUCTIVITY, FUEL ECONOMY Komatsu's D65-17 crawler dozers are powered by fuel-efficient EPA Tier 4 Interim engines. The 205-horsepower units feature operating weights ranging from 44,355 to 49,315 pounds. The company says the dozers combine the SigmaDozer blade with a new efficient automatic trans- mission with lock-up torque converter to achieve exceptional productivity and fuel economy. Standard, low ground pressure, and wide-track models are available. Komatsu CARE provides complimentary factory scheduled maintenance for 2,000 hours or the first three years, as well as two complimentary diesel particulate filter exchanges within five years. Write 1 on reader card. PUSH IT TO THE LIMIT John Deere INFINITE SPEED CONTROL The new 750K crawler dozer from John Deere features a PowerTech 6.8-liter Interim Tier 4 diesel engine that provides 155 to 165 horsepower at 1,800 revolutions per minute. A hydrostatic transmission is said to give customers infinite speed control, power management, live power turns, counter rotation while staying in gear, and dynamic brak- ing. A hydraulically driven cool-on-demand fan operates only as needed, which is said to decrease cab and bystander noise levels, and cut fuel consumption. The company says the machine's V-Cool package isolates coolers from dust and engine heat for increased efficiency and durability. Write 3 on reader card. Caterpillar Inc. ENHANCED AUTO SHIFT SYSTEM Caterpillar's 410-horsepower D9T dozer is powered by a Cat C18 engine with ACERT technology and weighs more than 110,000 pounds. Its Enhanced Auto Shift system provides operator-selectable forward and reverse speeds similar to an automatic transmission, which is said to provide increased production, fuel efficiency, and ease of operation. Cooling system refinements include a new radiator featuring an alu- minum corrosion-resistant, bar-plate design. A new air-to-oil hydraulic cooler delivers lower hydraulic-oil temperatures. 32 AGGREGATES MANAGER May 2012