suspension SUBARU LEGACY 1996 Service Repair Manual

1. Suspension
A: SPECIFICATIONS
1. STABILIZER
ModelBar dia. mm (in)
Front Rear
Sedan2200 cc 19 (0.75) 15 (0.59)
2500 cc 20 (0.79) 16 (0.63)
Wagon2200 cc 19 (0.75) 15 (0.59)
2500 cc 20 (0.79) 16 (0.63)
OUTBACK2200 cc 20 (0.79) 18 (0.71)
2500 cc 20 (0.79) 18 (0.71)
B: WHEEL ALIGNMENT
Sedan Wagon OUTBACK
FWD AWD FWD AWD AWD
FrontCamber
(tolerance: ±0°30′)0°05′0°05′0°05′0°05′0°20′
Caster
(tolerance: ±1°)3°05′3°05′3°05′3°05′2°50′
Toe-in mm (in) 0±3 (0±0.12) Total toe angle: 0°±20′
Kingpin angle (tolerance: ±1°) 14°15′14°15′14°15′14°15′13°30′
Wheel arch height
[tolerance:
+12
24mm (+0.47
0.94in)] mm (in)385 (15.16) 385 (15.16) 385 (15.16) 385 (15.16) 420 (16.54)
RearCamber
(tolerance: ±0°45′)0°55′1° 0°45′0°55′0°35′
Toe-in mm (in) 0±3 (0±0.12) Total toe angle: 0°±20′
Wheel arch height
[tolerance:
+12
24mm (+0.47
0.94in)] mm (in)369 (14.53) 369 (14.53) 379 (14.92) 379 (14.92) 419 (16.50)
Thrust angle 0°±20′
2
4-1SPECIFICATIONS AND SERVICE DATA
1. Suspension

B4M0182A
NOTE:

Front and rear toe-ins and front camber can be adjusted.
If toe-in or front camber tolerance exceeds specifications,
adjust toe-in and camber to the specification.

The other items indicated in the specification table can-
not be adjusted. If the other items exceeds specifications,
check suspension parts and joint portions of body suspen-
sion parts for deformities; and replace with new ones as
required.
3
4-1SPECIFICATIONS AND SERVICE DATA
1. Suspension

1. Conventional Suspension
1. FRONT SUSPENSION
B4M0765A
1Front crossmember

2Bolt ASSY
3Housing
4Washer
5Stop rubber (Rear)
6Rear bushing
7Stop rubber (Front)
8Ball joint
9Transverse link
10Cotter pin
11Front bushing
12Stabilizer link
13Clamp
14Bushing (2200 cc model)
15Stabilizer (2200 cc model)
16Jack-up plate
17Dust seal
18Strut mount

19Spacer
20Upper spring seat
21Rubber seat
22Dust cover
23Helper
24Coil spring
25Damper strut
26Adjusting bolt
27Castle nut
28Self-locking nut
29Adapter front crossmember
(OUTBACK model)

30Clip (OUTBACK model)
31Bushing
(2500 cc and OUTBACK model)

32Clamp
(2500 cc and OUTBACK model)
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 18±5 (1.8±0.5, 13.0±3.6)
T2: 20±6 (2.0±0.6, 14.5±4.3)
T3: 25±4 (2.5±0.4, 18.1±2.9)
T4: 29±5 (3.0±0.5, 21.7±3.6)
T5: 39 (4, 29)
T6: 44±6 (4.5±0.6, 32.5±4.3)
T7: 49±10 (5.0±1.0, 36±7)
T8: 54±5 (5.5±0.5, 39.8±3.6)
T9: 98±15 (10.0±1.5, 72±11)
T10:152±20 (15.5±2.0, 112±14)
T11:186±10 (19.0±1.0, 137±7)
T12:245±49 (25.0±5.0, 181±36)
4
4-1COMPONENT PARTS
1. Conventional Suspension

2. REAR SUSPENSION (AWD MODEL)
B4M0766A
1Stabilizer

2Stabilizer bracket

3Stabilizer bushing

4Clamp

5Floating bushing

6Stopper

7Stabilizer link

8Rear lateral link

9Bushing (C)

10Bushing (A)

11Front lateral link

12Bushing (B)

13Trailing link rear bushing

14Trailing link

15Trailing link front bushing
16Trailing link bracket

17Cap (Protection)

18Washer

19Rear crossmember

20Strut mount cap

21Strut mount

22Rubber seat upper

23Dust cover

24Coil spring

25Helper

26Rubber seat lower

27Damper strut

28Self-locking nut

29Crossmember reinforcement
lower (Sedan model)

30Adapter rear crossmember
(OUTBACK model)
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 20±6 (2.0±0.6, 14.5±4.3)
T2: 25±7 (2.5±0.7, 18.1±5.1)
T3: 44±6 (4.5±0.6, 32.5±4.3)
T4: 59±10 (6.0±1.0, 43±7)
T5: 98±15 (10.0±1.5, 72±11)
T6: 98±20 (10.0±2.0, 72±14)
T7: 113±15 (11.5±1.5, 83±11)
T8: 127±20 (13.0±2.0, 94±14)
T9: 137±20 (14.0±2.0, 101±14)
T10:196
+39
10(20.0+4.0
1.0, 145+29
7)
5
4-1COMPONENT PARTS
1. Conventional Suspension

3. REAR SUSPENSION (FWD MODEL)
B4M0185A
1Stabilizer

2Stabilizer bracket

3Stabilizer bushing

4Clamp

5Stabilizer link

6Adjusting bolt

7Adjusting wheel

8Rear lateral link

9Bushing (D)

10Bushing (A)

11Front lateral link

12Self-locking nut

13Washer

14Cap (Protection)
15Trailing link rear bushing

16Trailing link

17Trailing link front bushing

18Trailing link bracket

19Crossmember

20Strut mount cap

21Strut mount

22Rubber seat upper

23Dust cover

24Coil spring

25Helper

26Rubber seat lower

27Damper strut
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 20±6 (2.0±0.6, 14.5±4.3)
T2: 25±7 (2.5±0.7, 18.1±5.1)
T3: 44±6 (4.5±0.6, 32.5±4.3)
T4: 59±10 (6.0±1.0, 43±7)
T5: 98±20 (10.0±2.0, 72±14)
T6: 113±15 (11.5±1.5, 83±11)
T7: 127±20 (13.0±2.0, 94±14)
T8: 137±20 (14.0±2.0, 101±14)
T9: 196
+39
10(20.0+4.0
1.0, 145+29
7)
6
4-1COMPONENT PARTS
1. Conventional Suspension

G4M0488
6. THRUST ANGLE

Inspection
1) Position vehicle on a level surface.
2) Move vehicle 3 to 4 meters directly forward.
3) Determine locus of both front and rear axles.
4) Measure distance“L”between center line of loci of the
axles.

Thrust angle is less than 20’when“L”is equal to or less
than 15 mm (0.59 in).

Adjustment
Make thrust angle adjustments by turning toe-in adjusting
bolts of rear suspension equally in the same direction.
NOTE:
On FWD models, turn adjusting wheels one by one, by the
some amount in the opposite direction of the adjusting
bolts.

When one rear wheel is adjusted in a toe-in direction,
adjust the other rear wheel equally in toe-out direction, in
order to make thrust angle adjustment.
When left and right adjusting bolts are turned incremen-
tally by one graduation in the same direction, the thrust
angle of the AWD model will change approximately 10’[“L”
is almost equal to 7.5 mm (0.295 in)] and the thrust angle
of the FWD model will change approximately 12’[“L”is
almost equal to 9 mm (0.35 in)].
Thrust angle:
0°±20′
B4M0193A
NOTE:
Thrust angle refers to a mean value of left and right rear
wheel toe angles in relation to vehicle body center line.
Vehicle is driven straight in the thrust angle direction while
swinging in the oblique direction depending on the degree
of the mean thrust angle.
B4M0194A
Thrust angle: r
r=αβ2
α: Right rear wheel toe angle
β: Left rear wheel toe angle
NOTE:
Here, use only positive toe-in values from each wheel to
substitute forαandβin the equation.
14
4-1SERVICE PROCEDURE
1. On-car Services

1. Suspension
1. IMPROPER VEHICLE POSTURE OR IMPROPER
WHEEL ARCH HEIGHT
Possible causes Countermeasures
(1) Permanent distortion or breakage of coil spring Replace.
(2) Unsmooth operation of damper strut Replace.
(3) Installation of wrong strut Replace with proper parts.
(4) Installation of wrong coil spring Replace with proper parts.
2. POOR RIDE COMFORT
1) Large rebound shock
2) Rocking of vehicle continues too long after running over
bump and/or hump.
3) Large shock in bumping
Possible causes Countermeasures
(1) Breakage of coil spring Replace.
(2) Over-inflation pressure of tire Adjust.
(3) Improper wheel arch height Adjust or replace coil springs with new ones.
(4) Fault in operation of damper strut Replace.
(5) Damage or deformation of strut mount Replace.
(6) Unsuitability of maximum and/or minimum length of
damper strutReplace with proper parts.
(7) Deformation or loss of bushing Replace.
(8) Deformation or damage of helper in strut assembly Replace.
(9) Oil leakage of damper strut Replace.
3. NOISE
Possible causes Countermeasures
(1) Wear or damage of damper strut component parts Replace.
(2) Loosening of suspension link installing bolt and/or nut Retighten to the specified torque.
(3) Deformation or loss of bushing Replace.
(4) Unsuitability of maximum and/or minimum length of
damper strutReplace with proper parts.
(5) Breakage of coil spring Replace.
(6) Wear or damage of ball joint Replace.
(7) Deformation of stabilizer clamp Replace.
47
4-1DIAGNOSTICS
1. Suspension

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

87
4-3DIAGNOSTICS
1. Power Steering

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.
94
4-3DIAGNOSTICS
1. Power Steering

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.
96
4-3DIAGNOSTICS
1. Power Steering