Steering Chassis Electrohydraulic power steering, Servotwin ® (C6H) The Servotwin ® electrohydraulic power steering system is standard equipment in all 4-axle vehicles with 9 t front axle load; its use in vehicles with front axle loads below 9 t is dictated by the wheelbase and the tires. For 4-axle vehicles that do not meet the above criteria, the Servotwin ® steering is avail- able as special equipment. The electrical power assistance means that a speed-dependent control force can be produced and the wheels are actively returned to their straightahead position. Overall, this provides a substantial improvement in steering comfort and dynamics.
If the on-board electrical system fails and the engine stops at the same time while driving, the electrical steering system is powered by a buffer battery. The Servotwin ® system combines a conventional hydraulic steering gear with an electric drive sys- tem. This replaces the second hydraulic steering circuit previously used in 4-axle vehicles. Servotwin ® features an electrical emergency steer- ing function in the event of a hydraulics failure. If the electrical system fails, the hydraulic steering assistance remains intact. 60 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 –