1997 SUBARU LEGACY service

G4M0182
(2) Remove shaft using a hand press.
CAUTION:

Discard old drive shaft assembly; replace with a new
one.

Be careful not to scratch or dent casing’s surface
which serves as a seal.
G4M0183
(3) Pry oil seal off using a screwdriver.
CAUTION:
Be careful not to scratch inner surface of casing.
4) Remove pressure switch.
D: INSPECTION
Perform the following inspection procedures and repair or
replace defective parts.
Part name Description Remedy
1. Front casing1) Damage on body surfaces
2) Excessive wear on hole, into which spool valve
is inserted.
3) Wear and damage on cartridge assembly mount-
ing surface
4) Wear and damage on surfaces in contact with
shaft and oil sealReplace with a new one together with spool valve
as selective fit is made.
2. Rear cover1) Damage on body surfaces
2) Wear and damage on sliding surfacesReplace with a new one.
3. Shaft1) Shaft bend
2) Wear and damage on surfaces in contact with
bushing and oil seal
3) Wear and damage on rotor mounting surfaces
4) Bearing damageReplace with a new one.
4. Side plate Wear and damage on sliding surfaces Replace with a new one.
5. Cam ring Ridge wear on sliding surfaces
If damage is serious, replace with a new cartridge
assembly. 6. Vane Excessive wear on nose radius and side surfaces
7. Rotor1) Wear and damage on sliding surfaces
2) Ridge wear on vane sliding grooves (If light
leaks with vane in slit against light source)
3) Damage resulting from snap ring removalCorrect with oil stone. If damage is serious, replace
with a new cartridge assembly.
8. Spool valve Damage or burrs on sliding surface peripheryReplace with a new one together with front casing
as selective fit is made.
9. Connector Damage on threads Replace with a new one.
10. Spring Damage Replace with a new one.
11. Bolts and nuts Damage on threads Replace with a new one.
75
4-3SERVICE PROCEDURE
8. Oil Pump (Power Steering System)

E: ASSEMBLY
1) Reassembly precautions
(1) Whenever O-rings, oil seals, and snap rings are
removed, they must be replaced with new ones.
(2) Thoroughly wash parts and allow to dry. They must
be kept free from cleaning oil and dust.
(3) Reassembly procedure must be performed in clean
place. Ensure that parts are kept away from waste
threads or other dust particles.
(4) Cleaning oil tends to stay inside the front casing.
Remove it completely by blowing compressed air.
(5) Ensure that parts are free from rust. (Use specified
hydraulic oil for rust prevention after cleaning and dry-
ing.)
(6) Reverse the sequence of disassembly procedures.
2) Shaft
(1) Apply grease to oil seal and inner surface of front
casing (at bearing location).
CAUTION:
Make sure that the front body internal surfaces are free
from damage.
G4M0184
(2) Using ST, press-fit oil seal into front body.
ST 340099AA000 INSTALLER
CAUTION:
When press-fitting, use care to prevent damage to sur-
face mating with rear body.
NOTE:
Orient oil seal toward correct direction.
G4M0185
(3) Using ST, press-fit shaft assembly into front body
and mount snap ring.
ST 340099AA020 INSTALLER
NOTE:
Turn snap ring to ensure that it fits right into the groove.
76
4-3SERVICE PROCEDURE
8. Oil Pump (Power Steering System)

G4M0186
3) Cartridge assembly
(1) Apply specified hydraulic oil to O-rings and fit them
into front casing.
(2) Install side plate to front casing.
CAUTION:
Use care not to let side plate gall.
G4M0187
(3) Mount rotor onto shaft.
(4) Install 10 vanes into rotor with their nose radius
facing toward cam ring.
(5) Install cam ring to front casing, securing with knock
pins.
CAUTION:
Do not use hammer to fit knock pins in position.
G4M0188
4) Rear cover
(1) Mount seal washer on front casing.
(2) With knock pin positions aligned, install rear cover.
Tightening torque:
16±2 N⋅m (1.6±0.2 kg-m, 11.6±1.4 ft-lb)
CAUTION:
Loosely tighten bolts in the sequence
1,3,2, and4
shown in figure. Then, tighten in the same sequence.
G4M0189
5) Spool Valve
(1) Install spring into front casing. Then, with spool
valve dipped in specified hydraulic oil, install it into the
front casing.
(2) Using a 5-mm dia. round bar, ensure that valve
moves smoothly.
(3) Set O-ring, with grease applied to it, onto connec-
tor and secure connector to front casing.
Tightening torque:
74±5 N⋅m (7.5±0.5 kg-m, 54.2±3.6 ft-lb)
CAUTION:

Use care to prevent damage to O-ring at installation.

When tightening connector, ensure that O-ring does
not protrude or get caught.
77
4-3SERVICE PROCEDURE
8. Oil Pump (Power Steering System)

6) Check
(1) When reassembly procedures have been
completed, turn shaft by hand to ensure it turns
smoothly. If it binds or other unusual conditions are
evident, disassemble again and check for foreign mat-
ter trapped on sliding surfaces and improper installa-
tion. Eliminate the cause of trouble.
(2) Check followings by referring to“CHECK”article.

Excessive play in pulley shaft

Ditch deflection of pulley

Resistance to rotation of pulley

Measurement of generated oil pressure
F: INSTALLATION
1) Install bracket on engine.
Tightening torque:
22±2 N⋅m (2.2±0.2 kg-m, 15.9±1.4 ft-lb)
2) Install oil pump on oil tank as follows outside the
vehicle:
NOTE:
Prior to installation, make sure that all oil is removed from
oil pump, oil tank and pipe.
B4M0562A
3) Place oil pump in vise.
CAUTION:
Do not place oil pump directly in vise; use soft pads
and hold oil pump lightly to protect it.
4) Install O-ring on oil pump.
CAUTION:
Discard old O-ring and replace with a new one.
5) Install oil tank on oil pump.
Tightening torque:
Bolt C: 15.7±2.4 N⋅m
(1.60±0.24 kg-m, 11.58±1.77 ft-lb)
Bolt D: 18.1±2.5 N⋅m
(1.85±0.25 kg-m, 13.35±1.84 ft-lb)
CAUTION:
Discard old seal washer and replace with a new one.
78
4-3SERVICE PROCEDURE
8. Oil Pump (Power Steering System)

B4M1163A
6) Install stay to oil pump. (2500 cc model only)
Tightening torque:
15.7±2.5 N⋅m (1.6±0.25 kg-m, 11.6±1.8 ft-lb)
B4M0560
7) Install oil pump, previously assembled to oil tank, on
bracket.
Tightening torque:
20.1±2.5 N⋅m (2.05±0.25 kg-m, 14.8±1.8 ft-lb)
8) Place oil pump pulley and tighten pulley nut temporarily.
B4M1159A
9) Interconnect pipes C and D.
Tightening torque:
Joint nut
15±5 N⋅m (1.5±0.5 kg-m, 10.8±3.6 ft-lb)
CAUTION:
If a hose is twisted at this step, the hose may come into
contact with some other parts.
10) Connect pipe D from oil tank.
11) Connect pipe C from oil pump.
CAUTION:
Use a new gasket.
Tightening torque:
34±5 N⋅m (3.5±0.5 kg-m, 25.3±3.6 ft-lb)
12) Tighten bolt A.
Tightening torque:
13±3 N⋅m (1.3±0.3 kg-m, 9.4±2.2 ft-lb)
13) Install pulley belt to oil pump.
14) Tighten oil pump pulley nut to the specified torque.
Tightening torque:
61±7 N⋅m (6.2±0.7 kg-m, 44.8±5.1 ft-lb)
15) Adjust pulley belt tension.
16) Tighten bolt belt tension.
Tightening torque:
8±2 N⋅m (0.8±0.2 kg-m, 5.8±1.4 ft-lb)
17) Install pulley belt cover bracket.
18) Connect minus terminal of battery.
19) Feed the specified fluid and discharge air.
NOTE:
Never start the engine before feeding the fluid; otherwise
vane pump might be seized up.
79
4-3SERVICE PROCEDURE
8. Oil Pump (Power Steering System)

9. Power Steering Fluid
A: RECOMMENDED AIR BLEEDING AND
POWER STEERING FLUID
Recommended power steering fluid Manufacturer
ATF DEXRON II or ATF DEXRON IIEB.P.
CALTEX
CASTROL
MOBIL
SHELL
TEXACO
1) Feed the specified fluid with its level being about 5 cm
(2.0 in) lower than the mouth of tank.
2) Continue to turn steering wheel slowly from lock to lock
until bubbles stop appearing in the tank while keeping the
fluid at that level.
3) In case air is absorbed to deliver bubbles into piping
because the fluid level is lower, leave it about half an hour
and then do the step 2) all over again.
4) Start, and idle the engine.
5) Continue to turn steering wheel slowly from lock to lock
again until bubbles stop appearing in the tank while keep-
ing the fluid at that level.
It is normal that bubbles stop appearing after three times
turning of steering wheel.
6) In case bubbles do not stop appearing in the tank, leave
it about half an hour and then do the step 5) all over again.
7) Stop the engine, and take out safety stands after jack-
ing up vehicle again.
Then lower the vehicle, and idle the engine.
8) Continue to turn steering wheel from lock to lock until
bubbles stop appearing and change of the fluid level is
within 3 mm (0.12 in).
9) In case the following happens, leave it about half an
hour and then do step 8) again.
(1) The fluid level changes over 3 mm (0.12 in).
(2) Bubbles remain on the upper surface of the fluid.
(3) Grinding noise is generated from oil pump.
10) Check the fluid leakage at flare nuts after turning
steering wheel from lock to lock with engine running.
CAUTION:

Before checking, wipe off any fluid on flare nuts and
piping.

In case the fluid leaks from flare nut, it is caused by
dust (or the like) and/or damage between flare and
tapered seat in piping.

So remove the flare nut, tighten again it to the speci-
fied torque after cleaning flare and tapered seat. If flare
or tapered seat is damaged, replace it with a new one.
11) Inspect fluid level on flat and level surface with engine
“OFF”by indicator of filler cap.
80
4-3SERVICE PROCEDURE
9. Power Steering Fluid

If the level is at lower point or below, add fluid to keep the
level in the specified range of the indicator. If at upper point
or above, drain fluid by using a syringe or the like.
Fluid capacity:
0.7
(0.7 US qt, 0.6 Imp qt)
B4M0563
(1) Check at temperature 21°C (70°F) on reservoir sur-
face of oil pump.
(2) Check at temperature 60°C (140°F) on reservoir
surface of oil pump.
81
4-3SERVICE PROCEDURE
9. Power Steering Fluid

Whine or growl (continuous or
intermittent)
While engine is running with/
without steering turned.Loosened installation of oil pump,
oil pump bracketRetighten.
*8
Abnormal inside of oil pump, hoseReplace oil pump, hose, if the
noise can be heard when running
as well as stand still.
Torque converter growl
air conditioner compression growlRemove power steering pulley
belt and confirm.
Creaking noise (intermittent)
While engine is running with
steering turned.Abnormal inside of gearboxReplace bad parts of gearbox.
Abnormal bearing for steering
shaftApply grease or replace.
*9
Generates when turning steering
wheel with brake (service or park-
ing) applied.If the noise goes off when brake
is released, it is normal.
*10
Vibration
While engine is running with/
without steering turned.
Too low engine speed at startAdjust and instruct customers.
Vane pump aerationFix wrong part.
Vent air.
Damaged valve in oil pump, gear-
boxReplace oil pump, bad parts of
gearbox.
Looseness of play of steering,
suspension partsRetighten.
*8 Oil pump makes whine or growl noise slightly due to its mechanism. Even if the noise can be heard when steering wheel
is turned at stand still there is no abnormal function in the system provided that the noise eliminates when the vehicle is
running.
*9 When stopping with service brake and/or parking brake applied, power steering can be operated easily due to its light
steering effort. If doing so, the disk rotates slightly and makes creaking noise. The noise is generated by creaking between
the disk and pads. If the noise goes off when the brake is released, there is no abnormal function in the system.
*10 There may be a little vibration around the steering devices when turning steering wheel at standstill, even though the com-
ponent parts are properly adjusted and have no defects.
Hydraulic systems are likely to generate this kind of vibration as well as working noise and fluid noise because of com-
bined conditions, i.e., road surface and tire surface, engine speed and turning speed of steering wheel, fluid temperature
and braking condition.
This phenomena does not indicate there is some abnormal function in the system.
The vibration can be known when steering wheel is turned repeatedly at various speeds from slow to rapid step by step
with parking brake applied on concrete road and in“D”range for automatic transmission vehicle.
95
4-3DIAGNOSTICS
1. Power Steering