Subaru Legacy 2005 Service Manual page 3383

6. OIL LEAKAGE
e
(1) Power cylinder
(2) Cylinder
1) Lift-up the vehicle.
2) Even if the location of leak can be easily found
by observing leaking condition, it is necessary to
thoroughly remove fluid from suspected portion
and turn the steering wheel from lock to lock about
30 to 40 times with engine running, then re-inspect
the suspected portion immediately after and sever-
al hours after this operation.
3) Cause and measure for oil leakage from "a"
The oil seal is damaged. Replace the valve assem-
bly with a new one.
4) Cause and measure for oil leakage from "b".
The torsion bar O-ring is damaged. Replace the
valve assembly with a new one.
5) Cause and measure for oil leakage from "c".
The oil seal is damaged. Replace the valve assem-
bly or oil seal with a new one.
6) Cause and measure for oil leakage from "d".
The pipe is damaged. Replace the faulty pipe or O-
ring.
7) Cause and measure for oil leakage from "g".
The hose is damaged. Replace the hose with a
new one.
Steering Gearbox [LHD Model]
(1)
(4) (3) (2)
g
d
(3) Rack piston
(4) Rack axle
PS-45
POWER ASSISTED SYSTEM (POWER STEERING)
b
a
(6)
c
g
(5) Input shaft
(6) Valve housing
8) If leak is other than a, b, c, d or g, or if oil is leak-
ing from gearbox, move the right and left boots to-
ward tie-rod end side, respectively, with the
gearbox mounted to the vehicle, and remove fluid
from surrounding portions. Then, turn the steering
wheel from lock to lock 30 to 40 times with the en-
gine running, then re-inspect the leaked portion im-
mediately after and several hours after this
operation.
(1) Leakage from "e"
The cylinder seal is damaged. Replace the rack
bush with a new one.
(2) Leakage from "f"
There are two possible causes. Perform the fol-
lowing step first. Remove the pipe assembly B
from the valve housing, and close the circuit us-
ing ST.
ST 926420000 PLUG
Turn the steering wheel from lock to lock 30 to
40 times with the engine running, then inspect
the leaked portion immediately after and several
hours after this operation.
• If leakage from "f" is noted again:
The oil seal of pinion and valve assembly is dam-
aged. Replace the pinion and valve assembly with
a new one. Or replace the oil seal and the parts that
are damaged during disassembly with new ones.
• If oil stops leaking from "f":
The oil seal of rack housing is damaged. Replace
the oil seal and parts that are damaged during dis-
assembly with new ones.
(5)
d
f
PS-00622