Caterpillar launch first K-family track-type tractor
CATERPILLAR have introduced the D6K track-type tractor –– the first in a new line of track-type tractors to come with the SystemOne undercarriage and hydrostatic powertrain as standard. Replacing the current D5N model, the 13-tonne D6K will be joined by the D3K, D4K and D5K later this year.
The D6K has a new centreline design featuring an electronically controlled hydrostatic drive system that automatically matches machine travel speed to the combined drive train and implement loads, while independent forward and reverse speeds provide operator-selectable speeds to match operating conditions and application requirements for quick cycle times and maximum productivity.
The hydrostatic drive train also offers independent power and control of each track, with fast acceleration, infinitely variable speeds from zero to10km/h, and automatic/on-the-go direction changes on each track. The operator can command smooth ‘power turns’ or even counter-rotation of the tracks using the hydrostatic control located on the left armrest of the new operator cab.
The D6K undercarriage features an oscillating track roller frame design, which decreases ground shock to the machine and provides a smoother, more comfortable ride. The oscillating track roller frames also keep more of the track on the ground when operating on uneven terrain, which increases machine stability and allows faster machine operation, increased machine productivity and reduced operator fatigue.
Caterpillar’s SystemOne undercarriage is standard on the D6K, further reducing operating costs and extending undercarriage life by up to 35%. Caterpillar say this system has been proven to outperform sealed and lubricated track and heavy-duty track across a wide range of applications and operating conditions.
To ensure maximum productivity in tough applications, the D6K is equipped with the six-cylinder Caterpillar C6.6 ACERT engine, which provides 125hp (93.2kW) at 2,100 rev/min. The engine incorporates a new cross-flow cylinder head design, with four valves per cylinder and the latest port geometry to provide improved airflow and more efficient combustion. The C6.6 common-rail engine uses the ADEM A4 advanced electronic controller for precise fuel delivery, resulting in exceptional lugging performance and lower emissions that meet the EU Stage IIIa emission requirements.
Serviceability has also been enhanced with the addition of a standard electric fuel-priming pump with integrated fuel/water separator. In addition, electronic monitoring systems alert the operator when service is required for the engine air cleaner and fuel/water separator.
The D6K is equipped with a hydraulic demand fan, which automatically adjusts fan speed to provide optimum cooling performance, lower sound levels and improved fuel economy, although an optional reversible fan that can be operated in manual or automatic purge modes is also available for dusty applications.
Within the spacious D6K operator station, which offers reduced noise levels and high levels of visibility to the blade corners, the new ergonomically designed seat-mounted electro-hydraulic controls provide precise blade control, quick steering response, and comfortable operation. The left joystick includes intuitive control of machine direction and speed, and buttons for programming and adjusting forward and reverse operating speeds, while the right ergonomic joystick manages the blade control operation.
The D6K also incorporates a single pedal, which combines the function of a deceleration pedal and service brakes. The operator can easily program the operation of the deceleration pedal to provide either variable engine speed or variable hydrostatic transmission speed. In either configuration, pressing the pedal past the speed control activates the service brakes.
