May 1, 2012
This selection of dozers can help keep stockpiles in good order and assist with other jobs around the quarry.
By Kerry Clines, Senior Editor
Komatsu America Corp.
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 transmission 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.
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 braking. 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.
Dressta North America
Dressta says its 330-horsepower TD-25M dozer is a complete workhorse on the jobsite. The machine features a 27.5-cubic-yard blade capacity, a joystick-operated double-tilt/pitch blade system, and an operating weight of 91,491 pounds. A two-speed gearing system delivers good traction, while its sloped engine hood design provides enhanced operator visibility to the blade.
Liebherr Construction Equipment Co.
Liebherr says its largest dozer, the 110,000-pound PR764, can now be ordered with a double-bogie system undercarriage, which provides better traction and less vibration while working on hard or rocky terrain. The company also offers application-specific kits to fit any job. The kits are available for Liebherr’s full line of dozers.
Case Construction Equipment
Case says its 1650L crawler dozer delivers power independently to each track, enabling the 144-horsepower unit to push a full blade through curves and turns. The machine features a 126-inch-wide blade, a blade capacity of 4.12 cubic yards, and an operating weight ranging from 33,714 to 35,203 pounds. Additional features include infinitely adjustable steering options for precise, easy operation; high-performance blade hydraulics; an easily adjustable blade pitch; three track options including Extra Long Track, Wide Track, and Low Ground Pressure; and an isolation-mounted operator platform to cushion the operator from the effects of noise and vibration.
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 aluminum corrosion-resistant, bar-plate design. A new air-to-oil hydraulic cooler delivers lower hydraulic-oil temperatures.
LeTourneau, a division of Joy Global
LeTourneau says its Pit Bull D-950 wheel-drive dozer offers a unique alternative to standard crawler-drive dozers. The 1,050-horsepower dozer combines the functionality of the 50-series loader with a 35-cubic-yard ‘semi-u-rock’ blade. Fuel-efficient operation is made possible by an advanced electric-drive system that allows the engine to operate at a constant RPM. Hydraulic pumps compensate flow and pressure for hoist and blade operation, further reducing engine demand.