The system is probably similar to the power steering system used on W-400-450-560-600-650 and 660.
A hydraulic cylinder with a long stroke is attached to the drag link. The cylinder has a hydraulic spool valve attached to its end near the connection to the drag link. When the steering wheel is moved, the valve ports open until until the cylinder catches up and restores equilibrium. At that point, the steering spindles cannot move until the operator rotates the steering wheel again.
650
660
This post was edited by Wardner at 10:32:31 02/18/10 2 times.
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