Modern Driveline System for Wheel Excavators

The mobility, working performance and therefore the total economy of wheel excavators can be greatly improved by increasing the maximum traveling speed of the vehicle. For wheel excavators with service weights up to 22 metric tons, a considerable effort is being invested into increasing the top travel speed from 20 km/h to approx. 35 km/h. This will result in setting new standards for modern driveline technology that will have the following requirements:

• The combination of the standard hydrostatic drive system with a power shiftable transmission
• Overspeed protection device for the hydraulic motor
• The integration of wet integrated multiplate wearfree disc brakes and clutches throughout the drive train system
• Layout of all components for increased engine power, higher rpms and torque
• Improvement of lubrication and oil system for increased performance
• Higher working efficiencies, reduction of heat generation leading to a better system economy
• Optimal coordination of transmission and axle ratios
• Lower noise level