Subaru LEGACY 2002 Quick Reference Index page 462

Power Assisted System (Power Steering)
! When the steering wheel is not being turned, the fluid that has passed through the flow control
valve is directed to the steering gearbox but it is returned to the reservoir tank without entering the
rotary control valve's passages in the gearbox. Therefore, the pressure acting on the valve's right
end does not increase.
On the other hand, the pressure acting on the left end of valve is the fluid pump-discharge pres-
sure which is higher than the pressure acting on the right end. This causes the pressure-sensitive
valve's spool assembly to move to the right. As a result, the drain port which was closed by the
outer spool is now opened. The pump discharged fluid then flows to the reservoir tank and the
pressure inside the pump is reduced.
(3)
(1) To reservoir tank
(2) Drain port open
POWER STEERING SYSTEM
(2)
(1)
PS-22
(3) Pressure from vane pump (high)
(4) Fluid pressure after passing through flow control valve
(low)
(4)
B4H1723B