Subaru Legacy 2003 Service Manual page 3389

POWER ASSISTED SYSTEM (POWER STEERING)
6. OIL LEAKING
(1) Power cylinder
(2) Cylinder
• Oil leaking points
1) If leak point is other than a, b, c, or d, perform the
5th step in "Oil leak check procedure and replace-
ment parts" before dismounting gearbox from vehi-
cle. <Ref. to "Oil leak check procedure and
replacement parts".> If gearbox is dismounted
without confirming where the leak is, it must be
mounted again to locate the leak point.
2) Even if the location of the leak can be easily
found by observing the leaking condition, it is nec-
essary to thoroughly remove the oil from the sus-
pected portion and turn the steering wheel from
lock to lock about 30 to 40 times with engine run-
ning, then make comparison of the suspected por-
tion between immediately after and several hours
after this operation.
3) Before starting oil leak repair work, be sure to
clean the gearbox, hoses, pipes, and surrounding
parts. After completing repair work, clean these ar-
eas again.
• Oil leak check procedure and replacement
parts
NOTE:
Parts requiring replacement are described in the
smallest unit of spare parts including damaged
parts and spare parts damaged. In actual disas-
sembly work, accidental damage as well as inevita-
ble damage to some related parts must be taken
into account, and spare parts for them must also be
prepared. However, it is essential to pinpoint the
cause of trouble, and limit the number of replace-
ment parts as much as possible.
STEERING GEARBOX [RHD MODEL]
( 5 )
a
b
( 6 )
d
(3) Rack piston
(4) Rack
PS-68
( 1 )
( 4 ) ( 3 ) ( 2 )
c
d
(5) Input shaft
(6) Valve housing
1) Leakage from "a"
The oil seal is damaged. Replace valve assembly
with a new one.
2) Leakage from "b"
The torsion bar O-ring is damaged. Replace valve
assembly with a new one.
3) Leakage from "c"
The oil seal is damaged. Replace oil seal with a
new one.
4) Leakage from "d"
The pipe is damaged. Replace the faulty pipe or O-
ring.
5) If leak is other than a, b, c, or d, and if oil is leak-
ing from the gearbox, move the right and left boots
toward tie-rod end side, respectively, with the gear-
box mounted to the vehicle, and remove oil from
the surrounding portions. Then, turn the steering
wheel from lock to lock 30 to 40 times with the en-
gine running, then make comparison of the leaked
portion immediately after and several hours after
this operation.
(1) Leakage from "e"
The cylinder seal is damaged. Replace rack
bush with a new one.
c
d
PS-00331