Long Track-on-ground and Oscillating Track Frame

 

Long track-on-ground and oscillating track frame improves machine stability and grading/dozing performance.

Hydrostatic Transmission (HST) Control System

 

  

The HST controller monitors engine output and work equipment/travel load. It controls HST pump and motor displacement to provide the optimum speed and drawbar pull. Power to both tracks during turns and counter-rotation makes the D51 extremely maneuverable.

Fuel Efficient Electronic Controlled Engine

 

The Komatsu SAA6D107E-1 engine delivers a net output of 97 kW incorporated into the D51-22 makes this dozer fuel efficient and the logical choice in both grading and dozing operations. The engine is turbocharged and features direct fuel injection and air-to-air aftercooling to maximize power, fuel efficiency, and emission compliance. To minimize noise and vibration, the engine is iso-mounted to the main frame.

Hydraulically-driven Cooling Fan

The engine cooling fan rotation speed and direction is electronically controlled. The fan rotation speed depends on engine coolant and hydraulic oil temperatures; the higher the temperature, the higher the fan speed. This system increases fuel efficiency, reduces operating noise levels, and requires less horsepower than a belt-driven fan. Additionally, cool ambient air is pulled in through perforations in the rear access doors adding to its cooling efficiency.