Allison claims to have added a raft of improvements to its 6000 Series transmission with the launch of the new 6620 model. The company has said that new hardware and software has been added to the transmission that is designed for rigid dump trucks and specialist mining trucks up to 70tonnes capacity, as well as stationary pumping, drilling and winch applications. The new design replaces the older 6610 and uses greater digital control to deliver sharper torque "response" through the driveline, which has nec
March 13, 2012
Read time: 2 mins
Allison claims to have improved durability with the 6620 transmission
1135 Allison claims to have added a raft of improvements to its 6000 Series transmission with the launch of the new 6620 model. The company has said that new hardware and software has been added to the transmission that is designed for rigid dump trucks and specialist mining trucks up to 70tonnes capacity, as well as stationary pumping, drilling and winch applications.
The new design replaces the older 6610 and uses greater digital control to deliver sharper torque "response" through the driveline, which has necessitated upgrades to protect the drivetrain.
For the flywheel, the use of FEA identified an opportunity to modify fillet radii and introduce heat treatment and reduce stress. Case hardening and nitriding other interfacing components such as the turbine shaft and hub, together with increasing the shaft's diameter, is expected to increase their fatigue durability by over six times. Extensive in-field comparative testing has identified a significantly more durable bronze-based material for use in the lock up clutch.
The opportunity to "tune" the transmission to an operator's specific requirement is now easier, permitting increased performance or economy depending on the duty-cycle or application.
