Improved performance of Sandvik flag ship trucks Sandvik TH663i and Sandvik TH551i
Sandvik TH663i and Sandvik TH551i trucks with the new transmission are expected to increase productivity and enable shorter cycle times. Maximum speed and efficiency in varying ramps and with different loads are achieved with eight gears and optimized axle ratio, compared to previous transmission with six gears. The fully proportional, more powerful hydraulic retarder operates simultaneously with the engine brake, enabling easier downhill control and higher speeds. Further, lock-up to lock-up gear shifting enables quick and smooth shifting and keeps speed better while driving uphill.
Improved reliability and reduced costs are achieved with robust and simple design, made specifically for heavy off-road application. Compared to the previous model, the transmission lifetime is expected to be longer, and less gearbox changeouts are required during the truck lifetime, reducing total costs. From the intelligence point of view, self-diagnostics in the transmission control system has been improved and fully integrated into the Sandvik Intelligent Control System, enabling easy and fast trouble shooting without external diagnostics tools or laptops.
