Subaru Impreza 2004 Service Manual page 55

Master Cylinder
BRAKE
12) Install the seal to reservoir tank.
(1) BR-00072
(1) Seal
13) Install the reservoir tank to master cylinder and
secure with pin.
D: INSPECTION
Inspect for oil leakage from the master cylinder.
NOTE:
After replacing piston kit; when the oil leakage is
found without damaging or scratching the inside of
cylinder wear of master cylinder inner wall may be
the cause. In this case, replace the master cylinder
as assembly.
BR-54