1997 SUBARU LEGACY Service Repair Manual

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Page 1273 of 3342

SUBARU LEGACY 1997 Service Repair Manual 4. FLUID LEAKAGE (LHD MODEL)
CAUTION:
It is likely that although one judges fluid leakage, there
is actually no leakage. This is because the fluid spilt
during the last maintenance was not completely

Page 1274 of 3342

SUBARU LEGACY 1997 Service Repair Manual B4M0564A
90
4-3DIAGNOSTICS
1. Power Steering

Page 1275 of 3342

SUBARU LEGACY 1997 Service Repair Manual 5. FLUID LEAKAGE (RHD MODEL)
CAUTION:
It is likely that although one judges fluid leakage, there
is actually no leakage. This is because the fluid spilt
during the last maintenance was not completely

Page 1276 of 3342

SUBARU LEGACY 1997 Service Repair Manual B4M0675A
92
4-3DIAGNOSTICS
1. Power Steering

Page 1277 of 3342

SUBARU LEGACY 1997 Service Repair Manual 6. NOISE AND VIBRATION
*6
Hiss noise (continu-
ous)
While engine is run-
ning with maximum
turning angle.
Relief valve soundGenerates at max.
turning angle.Normal (Don’t keep
this condition over 5
s

Page 1278 of 3342

SUBARU LEGACY 1997 Service Repair Manual *7
Grinding noise (continuous)
While engine is running.
Vane pump aerationInspect and retighten fluid line
connection.
Refill fluid and vent air.
Vane pump seizingReplace oil pump.
Pulley bearing seiz

Page 1279 of 3342

SUBARU LEGACY 1997 Service Repair Manual 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, hoseRepl

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

Page 1280 of 3342

SUBARU LEGACY 1997 Service Repair Manual 7. CLEARANCE TABLE (LHD MODEL)
CAUTION:
This table lists various clearances that must be cor-
rectly adjusted to ensure normal vehicle driving with-
out interfering noise, or any other faults.
Locatio

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