Subaru 2002 IMPREZA Service Manual page 2419

13) Using the ST, remove the plug.
ST 34199AE090 PLUG WRENCH
NOTE:
Make sure to align the ST pin to plug hole.
(1) Plug
STEERING GEARBOX [RHD MODEL]
B4M2602A
PS-57
POWER ASSISTED SYSTEM (POWER STEERING)
14) Remove the valve assembly.
CAUTION:
Be careful not to scratch the seal ring.
(1) Valve assembly
(2) Seal ring
15) Remove the holder using a 32 mm wrench or
adjustable wrench.
CAUTION:
Discard the old holder and replace with a new
one.
B4M2603A
G4M0820