Komatsu America launches the D155AX-8 crawler dozer

Komatsu’s new D155AX-8 dozer, with an operating weight of 89,300 pounds, has a 12.3 yd Sigmadozer blade which gives the machine a high blade capacity.

Rated at 354 horsepower net, the D155AX-8 is powered by a Komatsu SAA6D140E-7 engine, which is EPA Tier 4 Final emissions certified and “provides high levels of performance while reducing fuel consumption and operating costs,” the company says.

The machine has Komtrax technology. Data such as fuel levels, DEF levels, operating hours, location, 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. Komatsu claims lower fuel consumption with no loss of performance.

The Sigmadozer blade dramatically improves dozing performance and increases productivity up to 15% over a conventional Semi-U blade. The blade features a frontal design concept adopted for digging and rolling material at the center of the blade.

The blade shape increases soil holding capacity. Digging resistance is reduced for a smoother flow of material so larger amounts of soil can be dozed with less power.  For example, think of a conventional Semi-U blade as a flat shovel and the Sigmadozer as a spade nose shovel. A spade nose shovel is easier to push through the soil and requires less energy. The Sigmadozer blade works similarly to a spade nose shovel.

The D155AX-8 has an automatic gearshift transmission and lock-up torque converter that greatly reduces fuel consumption and provides exceptional power train efficiency. The lockup torque converter automatically transfers engine power directly to the transmission, decreasing fuel consumption by up to 10 percent while machine power is maintained.

The D155AX-8 uses an electronic control power train system that significantly improves operation and productivity. Powerful turns under various work conditions are achieved with the Hydrostatic Steering System (HSS). Counter-rotation is available while in neutral for minimum turning radius, providing excellent maneuverability. When operating in adverse conditions such as uneven ground, a K-bogie undercarriage system keeps the correct alignment between the rollers and links for a smoother ride as well as longer component life.

The new crawler dozer’s more comfortable working environment allows the operator to concentrate on the work at hand for increased productivity. A high capacity air suspension seat with heat is standard. The large cab is integrated with the ROPS (Roll-Over Protection Structure) for excellent side visibility. The dozer’s cab mounts reduce shocks and vibration even over adverse conditions and the interior cab decibel level is a very low for a noticeably quieter working environment.

A new high-resolution large color 7″ LCD monitor with pull-down menus enables quick operational adjustments and has enhanced service diagnostics capability. A rear view monitoring system is standard and can be set to synchronize with reverse operation.

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