Komatsu America Releases D61-23 Crawler Dozers

Komatsu America Corp. introduced its line of D61-23 crawler dozers. Using its popular D51-22 as a design starting point, Komatsu refined the dozer design to meet EPA Tier 4 Interim regulations while providing more owner- and operator-focused features, all bundled in a larger 130 to 160 HP package. komatsu wheel loader

New longer track-on-ground standard (EX) and low ground pressure (PX) models are available to offer flotation and weight distribution options. Operating weight ranges from 39,099 lbs. to 41,138 lbs. depending on the configuration. The new models push with a net 168 HP at 2200 rpm.

A full guarding package, hydraulic winch and other attachments are available for easy customization to meet specific customer requirements.

The D61-23 crawler dozer is equipped with KOMTRAX technology, which is fully integrated with Komatsu’s Tier 4 technology and sends machine operating information to a secure website utilizing wireless technology. Hour meter, location, cautions, load ratio, fuel consumption and maintenance alerts are relayed to the web application for analysis. The KOMTRAX fleet monitoring system increases machine availability, reduces the risk of machine theft, allows for remote diagnosis by the distributor and provides other information to drive business productivity.

Special features of these new crawler dozers include:

  • EPA Tier 4 Interim and EU stage 3B emission certified engine The Tier 4 Interim SAA6D107E-2 engine provides the same horsepower as its predecessor while lowering fuel consumption by up to 10 percent. The platform uses an advanced electronic control system to manage airflow rate, fuel injection, combustion parameters and after treatment functions to optimize performance, reduce emissions and provide advanced diagnostic capability.

The Komatsu Diesel Particulate Filter (KDPF) has an integrated design that will not interfere with daily operation, but will keep the operator aware of its status. Komatsu has also developed a hydraulically actuated Komatsu Variable Geometry Turbocharger (KVGT) and an Exhaust Gas Recirculation (EGR) valve, resulting in better precision and air management as well as longer component life.

Blade visibility and ride
The steeply sloped engine hood and new forward cab design provide more room for operators while moving them closer to the blade, for improved blade visibility, ride quality and overall comfort. The cab also has an integrated ROPS / FOPS structure and is designed using large glass windows for better visibility.

  • Durable and productive power angle tilt (PAT) blade A newly-designed PAT blade, with a highly durable box structure and good curvature, rolls material efficiently. The standard adjustable blade pitch allows the operator to adjust the aggressiveness of the cutting edge. The new hydraulic blade angle toggle switch improves ease of blade operation.  Enhanced provision for Topcon is standard.
  • Next generation HST transmission and engine control technology Two selectable Working Modes – E and P – match machine performance to the application.  E Mode is intended for all general dozing, leveling and spreading applications providing adequate speed and power while saving fuel.  P Mode is intended for slot dozing, ripping and uphill dozing where engine power has priority over fuel consumption.

Powerful turns under various work conditions are achieved with the new HST transmission, even under load. The D61-23 offers two gearshift modes: Variable and Customizable Quick shift. Variable shift mode provides 20 incremental speed settings for the operator, while the new Customizable Quick shift provides three speed settings; all can be adjusted in the monitor to obtain the right speed for different operator preferences.

  • Cab design

Komatsu’s Palm Command Control System (PCCS) gives operators maximum control, with thumb push buttons that simplify transmission speed setting shifts shown graphically in the monitor. The travel lever turning sensitivity can now be easily adjusted in the monitor to better match operator preferences, and the blade electro-hydraulic controls incorporate a new blade angle switch and float switch.