Fig.9-4
(3)Drawing-out of spool (See Fig.9-4)
With the mid-passage closed, the oil from the main oil-inlet pushes up the check
valve and flows into the port “A”. The return oil from the port “B” flows through the
low-pressure passage to the tank. The spool can be restored to its neutral position by
return spring.
9.3.2 Relief valve and flow divider (See Fig.9-5)
Fig.9-5
Oil return port
Oil inlet port
Main safe valve
Flow divider
To steering unit
-73-
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