3.1.2 Powered steering unit (Fig. 3-2)
The powered steering unit can transmit the pressure oil from the flow-divider by
metering to the steering cylinder in terms of the rotating angle of the hand-wheel. When
the steering pump stops running, a manpowered steering should be adopted.
The powered steering unit consists of a general steering unit and a combination valve.
The hole on the cover of combination valve is relief valve. In the valve body, there is a
bipartite over-load warning valve, which protects the parts from damage when the truck
wheels suffer unexpected impact and cause high pressure for hydraulic system. We have
adjusted the relief valve and bipartite over-load warning valve, the users can’t adjust them
without permission.
Fig. 3-2 Powered steering unit
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