Komatsu America Corp. (KAC) recently introduced its new D375A-6 crawler dozer for use in mining and heavy construction applications. Following an extensive amount of customer input and feedback, the new dozer includes technological enhancements for even greater productivity.
A highly efficient Komatsu SAA6D170E-5 engine with an operating weight of 157,940 lbs powers the new D375A-6. The dozer delivers 636 gross hp @ 1800 RPM (SAE J1995, 610 hp net @ 1800 rpm – SAEJ1349)while maintaining high fuel efficiency and meeting all EPA Tier 3 and EU stage 3A emissions requirements. Combined with new features and upgrades, the D375A-6 is an outstanding crawler dozer.
According to Richard Smith, product manager-mechanical drive equipment, the new dozer’s design and engineering updates are based on, “direct input from customers. The increase in horsepower, for example was because they said they need more power in some applications. The D375A-6 has two power modes: 1-maximum power at 610 hp and 2-economy at 525 horsepower.
Komatsu invited customers and trade press editors to see the first machine run through its paces at the company’s demonstration and training facility located in Cartersville, GA. More than 70 end-users from across the country were there to see the new machine in action.
Productivity Performance
The D375A-6 increases net engine output by 85 HP to 610 HP at 1800 RPM. As with the previous -5EO model, a reduction in fuel consumption is realized because of the automatic transmission with lockup torque converter. Komatsu’s electronic powertrain control system produces an efficient and effective drawbar pull.
An updated Full-U 28.8 cubic yard blade allows for increased production without increasing blade width or reducing digging force. The shape of the blade is similar to the next-size-class-larger Komatsu dozer, the D475A-5EO. The overall-dozing capability is increased compared to the prior model without compromising visibility and balance. In fact several of the operators commented on the balance of the machine, noticing that the blade was placed back, closer to the cab. Smith confirmed the fact that the blade was approximately 8 inches back.
Operator Enhancements
A large multi-lingual user-friendly LCD (liquid crystal display) multi-color monitor enables an operator to perform work efficiently and accurately. Excellent screen visibility is achieved with the use of TFT (Thin Film Transistor) enabling viewing at various angles and lighting conditions. Komatsu-designed function keys enable multi-function operations. Various meters, gauges and warning functions are centrally arranged for simple start-up, inspection and prompt warning of any abnormalities.
To assist in environmentally aware and energy saving operation of the machine, an easy-to-read “eco gauge” is displayed on the right side of the multi-monitor screen. For energy saving operation, the operator simply operates the machine with the eco gauge in the green range.
The operator-friendly monitor is easy to see and read. It provides the operator with a full array of information and machine control switches. Service intervals are conveniently available on the monitor.
Standard Mining Specifications
There are sixteen new, standard mining specifications including but not limited to: high mounted headlights; 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 successful D475A-5EO hydraulic system replaces the previous tandem gear pump for efficiency and reliability.