Komatsu America Corp.'s new D375A-6 crawler dozer for mining and heavy construction applications is powered by a Komatsu SAA6D170E-5 engine. With an operating weight of 157,940 lb (71,640 kg), the dozer delivers SAE J1995 636 hp gross (474 kW) and SAE J1349 610 hp net (455 kW) at 1800 rpm while maintaining high fuel efficiency and meeting all U.S. EPA Tier 3 and EU stage 3A emissions requirements, according to the company.
The D375A-6 offers an increase in net engine output by 85 hp (63 kW) at 1800 rpm compared to the prior D365-5EO model. As with the -5EO, a reduction in fuel consumption is realized because of the automatic transmission with lockup torque converter. Komatsu says its electronic powertrain control system results in an efficient drawbar pull.
An updated full-U 28.8-yd3 (22-m3) blade allows for increased production over the previous model without increasing blade width or reducing digging force. The shape of the blade is similar to Komatsu's larger D475A-5EO dozer. The overall dozing capability is increased over the -5EO without compromising visibility and balance.
A large multilingual LCD multicolor monitor contributes to efficient and accurate operator productivity, says Komatsu. Enhanced screen visibility is achieved with the use of thin-film transistor, enabling viewing at various angles and lighting conditions. Komatsu-designed function keys enable multifunction operations. Various meters, gauges, and warning functions are centrally arranged for simple start-up, inspection, and prompt warning of any abnormalities.
An easy-to-read “eco gauge” is displayed on the right side of the multimonitor screen. For energy-saving operation, the operator simply operates the machine with the eco gauge in the green range.
There are 16 new standard mining specifications including, but not limited to, high mounted head lights, battery and starter isolator box, centralized grease points, and manual engine stop switches. Optional mining specifications include right- and left-hand platforms with handrails and HID work lights. A variable piston pump derived from the D475A-5EO hydraulic system replaces the previous tandem gear pump for efficiency and reliability.