Subaru LEGACY 2002 Quick Reference Index page 463

! When the steering wheel is turned in either direction, the pressure of the fluid that has passed
through the flow control valve and directed into the steering gearbox increases as it enters the
power cylinder and acts on the rack piston.
The inner spool of the pressure-sensitive valve is kept pressed to the right by the pump-discharge
pressure acting on its left end. On the other hand, the fluid pressure acting on the right end of the
valve is also high. So, the outer spool is moved to the left, closing the drain port. As a result, the
pump internal pressure increases so that the fluid with a high pressure necessary for power as-
sistance is supplied to the gearbox.
(3)
(1) To reservoir tank
(2) Drain port closed
(3) Pressure from vane pump
POWER STEERING SYSTEM
(2)
(1)
(5)
PS-23
Power Assisted System (Power Steering)
(6)
(4) Fluid pressure after passing through flow control valve
(increased)
(5) Inner spool
(6) Outer spool
(4)
B4H1724B