Steering
9803/3280 Issue 1
Priority Valve Operation 1
- Neutral
When the steering is not being operated, flow to the
steering circuit is dead ended by the closed centre
steering unit 43 and no load is sensed in line LS.
Pressure from the main pump to the priority valve is
fed via a drilling 2C to the rear of spool 2B. The
high pressure differential created across the spool
causes it to move to the left against the force of the
spring 2A. This allows full pump flow to the loader
control valve 3.
Component Key:
LS Load Sensing Port
P From pump
T To Loader Valve
2 Priority Valve
2A Spring
2B Spool
2C Drilling
3 Loader Valve
43 Steer Unit
43B Relief Valve
5 - 2 5 - 2
Circuit Descriptions
Section H Section H
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