The new D475A-8 dozer from Komatsu looks to be a reliable and productive support machine option for the mining sector.
The D475A-8 boasts an operating weight of 115,300 kg (254,193 lbs), with a net horsepower of 664 kW at 2,000 rpm (890 HP) in forward and 722 kW (968 HP) in reverse.
As a result, this additional horsepower can yield faster ground speeds and shorter cycle times, two factors that can help to speed up production and increase yield.
Also, Komatsu included a lockup torque converter, which can produce a more efficient transfer of power to the driveline. The automatic gearshift mode allows the system to automatically engage the torque converter lockup clutch.
Transmitting all the engine power directly to the transmission can increase ground speed and offer efficiencies equal to a direct drive, thus, consuming less fuel.
Komatsu reports that the new D475A-8 will offer up to a 10% increase in productivity, an 11.5% increase in engine power in reverse and a 10% reduction in fuel consumption with automatic transmission with lockup torque converter compared to manual gearshift operation.
Enhanced conditions for operators
Within the cab, ergonomically placed touch points, palm control joysticks, a rear view monitoring system and a heated, ventilated, air-suspended seat look to make lengthy sessions more comfortable.
Also, Komatsu seeks to reduce shock and vibrations when operating the D475A-8 in rugged conditions with a redesigned undercarriage.
Blade pitch & support
Implementing an auto-pitch system to the blade has become common in many dozers. Komatsu included their own version of this called blade auto-pitch mode This mode looks to allow consistent pitch accuracy with customizable pre-sets.
Also, the blade of the D475A-8 has been designed with a new support composition. Komatsu claims that it will reduce side-to-side swaying of the blade, holding it firm and offering more precise passes.