1997 SUBARU LEGACY power steering

Check tie-rod ends, tie-rods and ball
joints of suspension for unsteady
revolution or rattling.
GOOD
NOT GOOD
Inspect, replace if necessary.
Measure rotating and sliding resistance
of gearbox.
Result: Rotating resistance is 11.18 N
(1.14 kg, 2.51 lb) or less around
center position and 15.79 N
(1.61 kg, 3.55 lb) or less in all
positions within 20% difference
between clockwise and
counterclockwise.
Sliding resistance is 304 N (31
kg, 68 lb) or less with 20%
difference between left and right
directions.NOT GOOD
Readjust backlash, if ineffective replace
bad parts.
B4M0146

Measurement of steering effort is as shown in the fig-
ures.
B4M0147

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G4M0199

Measurement of folding torque of universal joint is as
shown in the figures.
G4M0200
G4M0201
G4M0202
G4M0203
NOTE:
Using ST, measure resistances of gearbox.
ST 926230000 SPANNER
Rotating resistance:
Straight-ahead position within 30 mm (1.18 in)
from rack center
Less than 11.18 N (1.14 kg, 2.51 lb)
Maximum allowable torque
15.7 N (1.6 kg, 3.5 lb)
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G4M0204
Sliding resistance:
Right-turn steering
304 N (31 kg, 68 lb) or less
Left-turn steering
304 N (31 kg, 68 lb) or less
G4M0205
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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 wiped
off. Be sure to wipe off spilt fluid thoroughly after
maintenance.
Leakage from connecting portions of
pipes and hoses, numbered with1thru9in figure
Insufficient tightening of flare nut,
catching dirt or the like, damage to
flare or flare nutLoosen and retighten, if ineffective,
replace.
Poor insertion of hose, poor clamp-
ingRetighten or replace clamp.
Damaged O-ringReplace O-ring pipe or hose with
new one, if ineffective, replace gear-
box also.
Leakage from hose10and11in
figureCrack or damage in hoseReplace with a new one.
Crack or damage in hose hardware
Leakage from surrounding of cast
iron portion of oil pump12and13in
figureDamaged oil sealReplace oil seal.
Damaged oil seal
Leakage from oil tank,14and15in figureCrack in oil tank,14Replace oil tank.
Damaged O-ring,15Replace O-ring.
Leakage from filler neck16Damaged cap packingReplace cap.
Crack in root of filler neckReplace oil tank.
High fluid level *5Adjust fluid level.
Leakage from surrounding of power
cylinder of gearbox,17in figureDamaged oil sealReplace bad parts.
Leakage from control valve of
gearbox,18and19in figureDamaged packing or oil seal
Damage in control valve
*5 Fluid level is specified at optimum position (range) for ordinary use. Accordingly, if the vehicle is used often under hard con-
ditions such as on very rough roads or in mountainous areas, fluid may bleed out from cap air vent hole. This is not a prob-
lem. If a customer complains strongly and is not likely to be satisfied with the leakage, lower the fluid level to the extent that
fluid will not bleed out under the conditions described, and have the customer check the fluid level and its quality more fre-
quency than usual.
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4-3DIAGNOSTICS
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B4M0564A
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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 wiped
off. Be sure to wipe off spilt fluid thoroughly after
maintenance.
Leakage from connecting portions of
pipes and hoses, numbered with1thru9in figure
Insufficient tightening of flare nut,
catching dirt or the like, damage to
flare or flare nutLoosen and retighten, if ineffective,
replace.
Poor insertion of hose, poor clamp-
ingRetighten or replace clamp.
Damaged O-ringReplace O-ring pipe or hose with
new one, if ineffective, replace gear-
box also.
Leakage from hose10and11in
figureCrack or damage in hoseReplace with a new one.
Crack or damage in hose hardware
Leakage from surrounding of cast
iron portion of oil pump12and13in
figureDamaged oil sealReplace oil seal.
Damaged oil seal
Leakage from oil tank,14and15in figureCrack in oil tank,14Replace oil tank.
Damaged O-ring,15Replace O-ring.
Leakage from filler neck16Damaged cap packingReplace cap.
Crack in root of filler neckReplace oil tank.
High fluid level *5Adjust fluid level.
Leakage from surrounding of power
cylinder of gearbox,17in figureDamaged oil sealReplace bad parts.
Leakage from control valve of
gearbox,18and19in figureDamaged packing or oil seal
Damage in control valve
*5 Fluid level is specified at optimum position (range) for ordinary use. Accordingly, if the vehicle is used often under hard con-
ditions such as on very rough roads or in mountainous areas, fluid may bleed out from cap air vent hole. This is not a prob-
lem. If a customer complains strongly and is not likely to be satisfied with the leakage, lower the fluid level to the extent that
fluid will not bleed out under the conditions described, and have the customer check the fluid level and its quality more fre-
quency than usual.
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B4M0675A
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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
seconds.)
Generates without
steering operation.Defective
Replace oil pump.
Rattling noise
(intermittent)
While engine is run-
ning.Interference with adjacent partsCheck clearance.
[Refer to next article
6.]
Correct if necessary.
Loosened installation of oil pump, oil tank, pump bracket,
gearbox or crossmember.Retighten.
Loosened installation of oil pump pulley or other pulley(s).Retighten.
Loosened linkage or play of steering or suspension.
Loosened tightening of joint or steering column.Retighten or replace.
Sound generates from the inside of gearbox or oil pump.Replace the gearbox
or oil pump.
Knocking
When turning steer-
ing wheel in both
direction with small
angle repeatedly at
engine ON or OFF.Excessive backlash
Loosened lock nut for adjusting backlash.Adjust and retighten.
Loosened tightening or play of tie-rod, tie-rod end.Retighten or replace.
*6 Don’t keep the relief valve operated over 5 sec. at any time or inner parts of the oil pump may be damaged due to rapid increase
of fluid temperature.
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