Front axle Hydraulic Auxiliary Drive (HAD) Front axle model designation 739.578 The front axle corresponds to the non-driven steel- sprung front axle with disk brakes and is available with 2 drops (130/5 and 70/10). The steering knuckle and the wheel head have been redeveloped in order to integrate the wheel hub motors and the feed line for the hydraulic fluid. The wheel hub motors are supplied with hydraulic fluid directly via the axle journals and spindles. This means that the hose lines only need to compensate for the motion of the springs (flexing) and not for steering movements (torsion), which increases the service life and reliability of the system.
W55.90-1001-00 Overview of front axle with wheel hub motors 46 i Introduction of the New Truck Generation - The New Arocs (Model 964) – This printout will not be recorded by the update service. Status: 01 / 2013 –