tires SUBARU LEGACY 1997 Service Repair Manual

4-4d
[TSao]
BRAKES
[ABS
5
.3i
TYPE]

6
.
Diagnostics
Chart
for
On-board
Diagnosis
System

Condition
a)
Brakes
Deceleration
:
g

O
Continuous
/
Olntermittent

b)
AcceleratorAcceleration
:
g

O
Continuous
/
O
Intermittent

c)
Vehicle
speed
km/h
MPH

O
Advancing

O
Accelerating

O
Reducing
speed

O
Low
speed

O
Turning

D
Others

d)
Tire
inflation
pressure
Front
RH
tire
:
kPa

Front
LH
tire
:
kPa

Rear
RH
tire
:
kPa

Rear
LH
tire
:
kPa

e)
Degree
of
wear
Front
RH
tire

Front
LH
tire

Rear
RH
tire

Rear
LH
tire

f)
Genuine
parts
are
used
.:
Yes
/
ONo

g)
Chain
is
passed
around
tires
.:
Yes
/
DNo

h)
T
tire
is
used
.:
Yes
/
ONo

i)
Condition
of
suspension
alignment

j)
Loading
state

k)
Repair
parts
are
used
.
:
OYes
/
ONo

What

I)
Others

14

H3M1180A
B: IDENTIFICATION
When replacing a rear differential assembly, select the cor-
rect one according to the following table.
CAUTION:
Using the different rear differential assembly causes
the drive line and tires to “drag” or emit abnormal
noise when AWD is selected.
Gear ratio Part number Stamp on rear differential
2200 cc
MT3.900 27011AA330
B3M0124
2200 cc
AT
4.111 27011AA340
B3M0127
2500 cc
MT
2500 cc
AT4.444 27011AA410
B3M0421
3
3-4SPECIFICATIONS AND SERVICE DATA
1. AWD System

Symptom and possible cause Remedy
5. Noises when cornering


1Damaged differential gear. Replace.


2Excessive wear or damage of thrust washer. Replace.


3Broken pinion mate shaft. Replace.


4Seized or damaged side bearing. Replace.
6. Gear noises
Since noises from engine, muffler, transmission, propeller shaft, wheel bearings, tires, and body are sometimes mistaken for noises
from differential assembly, be careful in checking them. Inspection methods to locate noises include coasting, accelerating, cruising,
and jacking-up all four wheels. Perform these inspections according to condition of trouble. When listening to noises, shift gears into
four wheel drive and fourth speed position, trying to pick up only differential noise.


1Improper tooth contact of hypoid gear. Readjust or replace hypoid gear set.


2Improper backlash for hypoid gear. Readjust.


3Scored or chipped teeth of hypoid gear. Replace hypoid gear set.


4Seized hypoid gear. Replace hypoid gear set.


5Improper preload for front or rear bearings. Readjust.


6Seized, scored, or chipped front or rear bearing. Replace.


7Seized, scored, or chipped side bearing. Replace.


8Vibrating differential carrier. Replace.
2. Propeller Shaft
Symptom and possible cause Remedy
1. Vibration of propeller shaft
Vibration is caused by propeller shaft during operation and is transferred to vehicle body. Generally vibration increase in proportion to
vehicle speed.


1Worn or damaged universal joint. Replace.


2Unbalanced propeller shaft due to bend or dent. Replace.


3Loose installation of propeller shaft. Retighten.


4Worn or damaged center bearing and damaged center mount-
ing rubber.Replace.
2. Tapping when starting and noise while cruising, caused by propeller shaft.


1Worn or damaged universal joint. Replace.


2Worn spline of sleeve yoke. Replace.


3Loose installation of propeller shaft. Retighten.


4Loose installation of joint. Replace.


5Worn or damaged center bearing and damaged center mount-
ing rubber.Replace.
NOTE:
Vibration while cruising may be caused by an unbalanced
tire, improper tire inflation pressure, improper wheel
alignment, etc.
41
3-4DIAGNOSTICS
1. Rear Differential - 2. Propeller Shaft

Symptom and possible cause Remedy
5. Noises when cornering


1Damaged differential gear. Replace.


2Excessive wear or damage of thrust washer. Replace.


3Broken pinion mate shaft. Replace.


4Seized or damaged side bearing. Replace.
6. Gear noises
Since noises from engine, muffler, transmission, propeller shaft, wheel bearings, tires, and body are sometimes mistaken for noises
from differential assembly, be careful in checking them. Inspection methods to locate noises include coasting, accelerating, cruising,
and jacking-up all four wheels. Perform these inspections according to condition of trouble. When listening to noises, shift gears into
four wheel drive and fourth speed position, trying to pick up only differential noise.


1Improper tooth contact of hypoid gear. Readjust or replace hypoid gear set.


2Improper backlash for hypoid gear. Readjust.


3Scored or chipped teeth of hypoid gear. Replace hypoid gear set.


4Seized hypoid gear. Replace hypoid gear set.


5Improper preload for front or rear bearings. Readjust.


6Seized, scored, or chipped front or rear bearing. Replace.


7Seized, scored, or chipped side bearing. Replace.


8Vibrating differential carrier. Replace.
2. Propeller Shaft
Symptom and possible cause Remedy
1. Vibration of propeller shaft
Vibration is caused by propeller shaft during operation and is transferred to vehicle body. Generally vibration increase in proportion to
vehicle speed.


1Worn or damaged universal joint. Replace.


2Unbalanced propeller shaft due to bend or dent. Replace.


3Loose installation of propeller shaft. Retighten.


4Worn or damaged center bearing and damaged center mount-
ing rubber.Replace.
2. Tapping when starting and noise while cruising, caused by propeller shaft.


1Worn or damaged universal joint. Replace.


2Worn spline of sleeve yoke. Replace.


3Loose installation of propeller shaft. Retighten.


4Loose installation of joint. Replace.


5Worn or damaged center bearing and damaged center mount-
ing rubber.Replace.
NOTE:
Vibration while cruising may be caused by an unbalanced
tire, improper tire inflation pressure, improper wheel
alignment, etc.
41
3-4DIAGNOSTICS
1. Rear Differential - 2. Propeller Shaft

Left side Right side
Camber is increased.
B4M0190
Rotate
counterclockwise.
B4M0350
Rotate clockwise.
Camber is decreased.
B4M0350
Rotate clockwise.
B4M0190
Rotate
counterclockwise.
3) Tighten the two self-locking nuts.
Tightening torque:
152±20 N⋅m (15.5±2.0 kg-m, 112±14 ft-lb)
M4A0059
3. FRONT WHEEL TOE-IN

Inspection
1) Using a toe gauge, measure front wheel toe-in.
Toe-in: 0±3 mm (0±0.12 in)
2) Mark rear sides of left and right tires at height corre-
sponding to center of spindles and measure distance“B”
between marks.
3) Move vehicle forward so that marks line up with front
sides at height corresponding to center of spindles.
4) Measure distance“A”between left and right marks.
Toe-in can then be obtained by the following equation:
BA = Toe-in
10
4-1SERVICE PROCEDURE
1. On-car Services

G4M0482

Adjustment
1) Loosen the left and right side steering tie-rods lock nuts.
2) Turn the left and right tie rods equal amounts until the
toe-in is at the specification.
Both the left and right tie-rods are right-hand threaded. To
increase toe-in, turn both tie-rods clockwise equal amounts
(as viewed from the inside of the vehicle).
3) Tighten tie-rod lock nut.
Tightening torque:
83±5 N⋅m (8.5±0.5 kg-m, 61.5±3.6 ft-lb)
CAUTION:
Correct tie-rod boot, if it is twisted.
NOTE:
Check the left and right wheel steering angle is within
specifications.
M4A0059
4. REAR WHEEL TOE-IN (FWD MODEL)

Inspection
1) Using a toe-in gauge, measure rear wheel toe-in.
Toe-in: 0±3 mm (0±0.12 in)
2) Mark rear sides of left and right tires at height corre-
sponding to center of spindles and measure distance“B”
between marks.
3) Move vehicle forward so that marks line up with front
sides at height corresponding to center of spindles.
4) Measure distance“A”between left and right marks.
Toe-in can then be obtained by the following equation:
BA = Toe-in
G4M0483

Adjustment
1) Remove cap from lateral link and loosen self-locking
nut.
CAUTION:

When loosening or tightening adjusting bolt, hold
the bolt head and loosen self-locking nut.

Replace self-locking nut with a new one.
2) Using two wrenches, turn adjusting wheel and adjusting
bolt equally in opposite directions so that toe-in is at the
specification.
11
4-1SERVICE PROCEDURE
1. On-car Services

Left side Right side
Toe-in is
increased.
B4M0191A
Turn adjusting
wheel
counterclockwise
and adjusting bolt
clockwise.
B4M0351A
Turn adjusting
wheel clockwise
and adjusting bolt
counterclockwise.
Toe-in is
decreased.
B4M0351A
Turn adjusting
wheel clockwise
and adjusting bolt
counterclockwise.
B4M0191A
Turn adjusting
wheel
counterclockwise
and adjusting bolt
clockwise.
G4M0485
NOTE:

When left and right wheels are adjusted for toe-in at the
same time, moving one scale graduation changes toe-in by
approximately 4 mm (0.16 in).

Turn adjusting wheel and adjusting bolt equally in oppo-
site directions so that same scale graduations are posi-
tioned directly above center of the adjusting bolt.
3) Tighten self-locking nut.
Tightening torque:
137±20 N⋅m (14±2 kg-m, 101±14 ft-lb)
M4A0059
5. REAR WHEEL TOE-IN (AWD MODEL)

Inspection
1) Using a toe-in gauge, measure rear wheel toe-in.
Toe-in: 0±3 mm (0±0.12 in)
2) Mark rear sides of left and right tires at height corre-
sponding to center of spindles and measure distance“B”
between marks.
3) Move vehicle forward so that marks line up with front
sides at height corresponding to center of spindles.
4) Measure distance“A”between left and right marks.
Toe-in can then be obtained by the following equation:
BA = Toe-in
12
4-1SERVICE PROCEDURE
1. On-car Services

G4M0520
6. Front Crossmember
A: REMOVAL
1) Disconnect ground cable from battery.
2) Loosen front wheel nuts.
3) Lift-up vehicle, and remove front tires and wheels.
4) Remove both stabilizer and jack-up plate.
5) Disconnect tie-rod end from housing.
6) Remove front exhaust pipe.
G4M0521
7) Remove front transverse link from front crossmember
and body.
8) Remove nuts attaching engine mount cushion rubber to
crossmember.
9) Remove self-locking nuts connecting steering U/J and
pinion shaft.
10) Lift engine by approx. 10 mm (0.39 in) by using chain
block.
11) Support crossmember with a jack, remove nuts secur-
ing crossmember to body and lower crossmember gradu-
ally along with steering gearbox.
CAUTION:
When removing crossmember downward, be careful
that tie-rod end does not interfere with DOJ boot.
B: INSTALLATION
1) Installation is in the reverse order of removal proce-
dures.
CAUTION:
Always tighten rubber bushing when wheels are in full
contact with the ground and vehicle is at curb weight
condition.
Tightening torque:
Transverse link bushing to crossmember:
98±15 N⋅m (10.0±1.5 kg-m, 72±11 ft-lb)
Stabilizer to bushing:
25±4 N⋅m (2.5±0.4 kg-m, 18.1±2.9 ft-lb)
Tie-rod end to housing:
27.0±2.5 N⋅m (2.75±0.25 kg-m, 19.9±1.8 ft-lb)
Front cushion rubber to crossmember:
69±15 N⋅m (7.0±1.5 kg-m, 51±11 ft-lb)
Universal joint to pinion shaft:
24±3 N⋅m (2.4±0.3 kg-m, 17.4±2.2 ft-lb)
Crossmember to body:
98±15 N⋅m (10.0±1.5 kg-m, 72±11 ft-lb)
2) Purge air from power steering system.
NOTE:
Check wheel alignment and adjust if necessary.
28
4-1SERVICE PROCEDURE
6. Front Crossmember

B4M0051
7. Full Wheel Cap
A: REMOVAL
Pry off the full wheel cap with a wheel cap remover inserted
between openings in the cap.
B: INSTALLATION
Align the valve hole in the wheel cap with the valve on the
wheel and secure the wheel cap by tapping four points by
hand.
8. Steel Wheel and Tire
1) Deformation or damage on the rim can cause air leak-
age. Check the rim flange for deformation, crack, or
damage, and repair or replace as necessary.
2) Take stone, glass, nail etc. off the tread groove.
G4M0297
3) Replace tire:
when large crack on side wall, damage or crack on
tread is found.
when the“tread wear indicator”appears as a solid
band across the tread.
CAUTION:
When replacing a tire, make sure to use only the
same size, construction and load range as originally
installed.
Avoid mixing radial, belted bias or bias tires on the
vehicle.
49
4-2SERVICE PROCEDURE
7. Full Wheel Cap - 8. Steel Wheel and Tire

B4M0051
7. Full Wheel Cap
A: REMOVAL
Pry off the full wheel cap with a wheel cap remover inserted
between openings in the cap.
B: INSTALLATION
Align the valve hole in the wheel cap with the valve on the
wheel and secure the wheel cap by tapping four points by
hand.
8. Steel Wheel and Tire
1) Deformation or damage on the rim can cause air leak-
age. Check the rim flange for deformation, crack, or
damage, and repair or replace as necessary.
2) Take stone, glass, nail etc. off the tread groove.
G4M0297
3) Replace tire:
when large crack on side wall, damage or crack on
tread is found.
when the“tread wear indicator”appears as a solid
band across the tread.
CAUTION:
When replacing a tire, make sure to use only the
same size, construction and load range as originally
installed.
Avoid mixing radial, belted bias or bias tires on the
vehicle.
49
4-2SERVICE PROCEDURE
7. Full Wheel Cap - 8. Steel Wheel and Tire