3B-22 STEERING
POWER STEERING UNIT
Power steering is designed to reduce the steering wheel turning effort by utilizing hydraulic pressure to bolster the
normal torque developed by the steering wheel box.
The power steering unit incorporates a power piston and sector shaft as an integral part of the steering gear. A
control valve is built into the steering housing.
Because the tire rolling resistance is constantly applied to the worm shaft, the torsion bar twists with the Steering
Wheel. As the torsion bar twists, the relative torque displacement between the worm shaft and the rotor changes.
An equivalent oil pressure is applied to the piston to bolster the normal torque.