Stefan Dorski, senior vice president and head of Scania Trucks, said: “By adding these options, we are making it even clearer that our XT range and our mining offer mean serious business. Their ability to deal with the kind of challenges trucks in heavy-duty operations are facing will make a difference regarding uptime and R&M cost for customers.”
Scania’s latest generation of automated gearboxes was introduced in 2020. They come with a wide gear ratio spread that, together with the relevant rear axle gearing, makes sure the engine can work on low revs while also providing its full torque.
The G-range, 60 kg lighter than its predecessor, is said to help operators save fuel through its reduced internal friction and by only having two synchronisers, since it uses pneumatic actuators and shaft brakes (three in total).
Eduardo Landeo, product manager at Scania Trucks, said: “Scania’s heavy-duty offer has never been stronger. Not only do we offer a full line-up of engine options but this addition, in combination with our wide axle range, means we can cater even better to the most demanding and heavy applications in the trucking industry.”
Heavy-duty truck combinations with high gross train weights typically use 6x4 rear bogie axles with “short” gearing (3.5:1 and higher; sometimes much higher). In hilly conditions or with high rolling resistance, this puts a lot of stress on the outgoing axle in the gearbox. The short gearing, typically in combination with hub reduction axles, is beneficial for take-off and starting the vehicle, leading to higher engine revs at cruising speed.
According to Scania, the properties of the heavy-duty gearboxes mean that more trucks can now use a faster gearing while still having all the margins on their side.