Steering
62
Chassis
i
Introduction of the New Truck Generation - The New Arocs (Model 964)
Function overview of Servotwin
®
1
Power steering pump
4
Servotwin
®
steering gear
6
Torsion bar with torque sensor
7
Worm gear
8
Electric motor
A73 Electrohydraulic power steering (APS) control unit
A76 Redundant power supply (RPS) control unit
A77 Steering angle sensor
G3 Buffer battery
M
H
Manual torque at steering wheel
M
L
Output torque at steering gear
M
M
Electrical torque
M
P
Hydraulic torque
A
Electric steering assist
B
Hydraulic steering assist
W46.00-1010-00
Steering gear
The ZF steering gear already familiar from the
Actros is supplemented by an electromechanical
unit for the Servotwin
®
system.
The electromechanical unit consists of:
• Torsion bar with torque sensor (6)
• Electric motor (8)
• Worm gear (9)
• Electrohydraulic power steering (APS) control
unit (A73)
• Steering angle sensor (A77)
The electric motor and the worm gear ensure that
an additional torque acts on the input of the steer-
ing gear in parallel with the steering wheel torque.
W46.20-1067-00
– This printout will not be recorded by the update service. Status: 01 / 2013 –
