Subaru 2002 IMPREZA Service Manual page 2399

2. CONTROL VALVE
1) Disconnect the four pipes from gearbox.
NOTE:
Remove the pipes E and F as a single unit being
fixed at clamp plate.
2) Secure the gearbox removed from the vehicle in
vise using ST.
ST 926200000 STAND
CAUTION:
Secure the gearbox in a vise using ST as
shown. Do not attempt to secure it without this
ST.
3) Using the ST, loosen the lock nut.
ST 926230000 SPANNER
4) Tighten the adjusting screw until it no longer
tightens.
STEERING GEARBOX [LHD MODEL]
S4M0143A
ST0085
ST0086
PS-37
POWER ASSISTED SYSTEM (POWER STEERING)
5) Loosen the adjusting screw, and then remove
the spring and sleeve.
CAUTION:
Replace the spring and/or sleeve if damaged.
6) Remove the two bolts securing valve assembly.
7) Carefully draw out the input shaft, and then re-
move the valve assembly.
8) Slide the dust cover out.
(1) Dust cover
S4M0154
ST0087
S4M0156B