Subaru 2004 LEGACY, Service Manual

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PS-45
POWER ASSISTED SYSTEM (POWER STEERING)
Steering Gearbox [LHD Model]
1) Lift up the vehicle.
2) Even if the location of leak can be easily found
by observing the leaking condition, it is necessary
to thoroughly remove the fluid from the suspected
portion and turn the steering wheel from lock to lock
about thirty to forty times with engine running, then
make comparison of the suspected portion be-
tween immediately after and several 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.
8) If leak is other than a, b, c, d, or g, and if oil is
leaking from the gearbox, move the right and left
boots toward tie-rod end side, respectively, with the
gearbox mounted to the vehicle, and remove fluid
from the surrounding portions. Then, turn the steer-
ing wheel from lock to lock thirty to forty times with
the engine running, and make comparison of the
leaked portion immediately 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. Take the follow-
ing step first. Remove the pipe assembly B from
the valve housing, and close the circuit with ST.
ST 926420000 PLUG
Turn the steering wheel from lock to lock thirty to
forty times with the engine running, then make
comparison of the leaked portion between im-
mediately after and several hours after this op-
eration.
• If leakage from “f” is noted again:
The oil seal of pinion & valve assembly is dam-
aged. Replace the pinion & valve assembly with a
new one. Or replace the oil seal and 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 the parts that are damaged during
disassembly with new ones.
F: ADJUSTMENT
1) Adjust the front toe. <Ref. to FS-12, FRONT
WHEEL TOE-IN, INSPECTION, Wheel Align-
ment.>
Standard of front toe:
IN 3 — OUT 3 mm (IN 0.12 — OUT 0.12 in)
2) Adjust the steering angle of wheels.
Standard of steering angle:
3) If the steering wheel spokes are not horizontal
when wheels are set in the straight ahead position,
and error is more than 5
°
on the periphery of steer-
ing wheel, correctly re-install the steering wheel.
4) If the steering wheel spokes are not horizontal
with vehicle set in the straight ahead position after
this adjustment, correct it by turning the right and
left tie-rods in opposite direction by same angle.
(1) Lock nut
Model 2.0 i, 2.5 i 3.0 R OUTBACK
Inner
wheel
37.3
°±
1.5
°
37.2
°±
1.5
°
37.8
°±
1.5
°
Outer
wheel
33.0
°±
1.5
°
32.9
°±
1.5
°
33.5
°±
1.5
°
(1) Within 5
°
PS-00107
PS-00513
(1)