Komatsu’s 264-horsepower D85-18 crawler dozer, aimed at large construction operations and small mining customers, features a Komatsu SAA6D125E-7 variable geometry, turbocharged and aftercooled Tier 4-Final-certified engine that the company says burns up to 5 percent less fuel.
A standard EX track model (D85EX-18) and a low-ground-pressure PX track model (D85PX-18) are available to offer customers flotation and weight-distribution options. The crawler dozers are equipped with the latest Komtrax technology. Data such as fuel levels, DEF levels, operating hours, location, and cautions and maintenance alerts are relayed to the web application for analysis. A new Operator Identification System reports key operating information for multiple operators, and a new Auto Idle Shutdown function helps reduce idle time as well as operating costs, according to Komatsu.
Watch Komatsu's walk-around in the video below.
The Komatsu Tier 4-Final diesel engine uses SCR technology and DEF to reduce NOx emissions, and it has an advanced electronic control system to manage the air-flow rate, fuel injection, combustion parameters, and aftertreatment functions. They system also provides advanced diagnostic capability. An Exhaust Gas Recirculation (EGR) valve with hydraulic actuator allows more precise temperature and air-management control.
Komatsu developed the entire system, including the control software; this control system is also integrated into the machine’s on-board diagnostics systems and the Komtrax standard telematics system.
The D85EX-18 is equipped with a 9.4-cubic-yard Sigmadozer blade that gives the machine a high blade capacity. The Sigmadozer with standard power pitch improves dozing performance and increases productivity by up to 15 percent over a conventional Semi-U blade, the company says. The blade features a frontal design concept adopted for digging and rolling material at the center of the blade.
The blade shape also increases soil-holding capacity. Digging resistance is reduced, too, for a smoother flow of material so larger amounts of soil can be dozed with less power.
The protruding cutting edge of the Sigmadozer blade resembles a spade nose shovel whereas the straight cutting edge of a conventional Semi-U blade resembles a flat shovel. The Sigmadozer works similarly to a spade nose shovel because it is easier to push through the soil and requires less energy, Komatsu says.
The D85-18 has a new automatic transmission with two gearshift modes—automatic or manual—that can be easily selected to fit the appropriate application: automatic for all general dozing; manual for dozing and ripping rough ground. E- and P-Modes help match machine performance to the application. E-Mode is chosen for all general dozing, leveling and spreading applications, providing adequate speed and power while saving up to 10 percent fuel usage, according to Komatsu. P-Mode is chosen for heavier applications where engine power has priority over fuel consumption.
A Hydrostatic Steering System is designed to transmit power to both tracks without interruption and helps operators execute power turns under various work conditions, and counter-rotation is available in neutral for minimum turning radius.
The cab features a new high-resolution 7-inch color LCD monitor with pull-down menus that enable quick machine adjustments and at-a-glance service diagnostics. A new rearview monitoring system is standard and can be set to synchronize with reverse operation. Also, rear hydraulics are standard on both the EX and PX versions.
All Komatsu Tier 4-Final machines come with KomatsuCare complimentary scheduled maintenance for 3 years/2,000 hours, whichever occurs first. KomatsuCare includes a 50-point inspection at each service and two complimentary DPF exchanges and DEF tank flushes within the first five years.
Komatsu K85EX-18 Specifications
- Engine: Komatsu SAA6D125E-7 diesel
- Power: 264 horsepower
- Blade capacity: 9.4 cubic yards