Infiniti M45 (Y34). Manual — part 549

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

FAX-3

C

E

F

G

H

I

J

K

L

M

A

B

FAX

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

PFP:00003

NVH Troubleshooting Chart

ADS0006B

Use chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.

×

: Applicable

Reference page

F

AX-

4

—

F

AX-

4

N

V

H

in

W

T

s

e

c

tio

n

.

N

V

H

in

W

T

s

e

c

tio

n

.

N

V

H in

PS s

e

c

tio

n

.

Possible cause and SUSPECTED PARTS

Im

pr

ope

r i

n

st

al

la

ti

on,

l

o

o

s

ene

ss

Par

ts

i

n

te

rf

er

enc

e

Wh

eel

b

ear

in

g d

a

m

a

ge

TIRES

ROAD W

H

EEL

STEERING

Symptom

FRONT AXLE

Noise

×

×

×

×

×

Shake

×

×

×

×

×

Vibration

×

×

×

×

Shimmy

×

×

×

×

×

Judder

×

×

×

×

Poor quality ride or handling

×

×

×

×

×

FAX-4

FRONT WHEEL HUB AND KNUCKLE

FRONT WHEEL HUB AND KNUCKLE

PFP:40202

On-Vehicle Inspection and Service

ADS0006C

Check that the mounting conditions (looseness, back lash) of each component and component status (wear,
damage) are normal.

WHEEL BEARING INSPECTION

●

Move wheel hub in the axial direction by hand. Check that there is no looseness of wheel bearing.

●

Rotate wheel hub and check that there is no unusual noise or other irregular conditions. If there are any
irregular conditions, replace wheel bearings.

Removal and Installation

ADS0006D

REMOVAL

1.

Remove tire with power tool.

2.

Remove brake caliper with power tool. Hang it in a place where it will not interfere with work. Refer to

BR-

23, "FRONT DISC BRAKE"

.

CAUTION:

Avoid depressing brake pedal while brake caliper is removed.

3.

Remove disc rotor.

4.

Use a hub cap pliers (suitable tool) to remove hub cap from wheel hub.

5.

Pull up caulked area of lock nut with flat-bladed screwdriver.

6.

Remove lock nut with power tool, then remove wheel hub and bearing assembly from strut assembly.

Standard value

Axial end play limit : 0.05 mm (0.002 in) or less

1.

Strut assembly

2.

Splash guard

3.

Grease seal

4.

Snap ring

5.

Wheel bearing

6.

ABS sensor rotor

7.

Wheel hub

8.

Lock nut

9.

Hub cap

SDIA1839E

FRONT WHEEL HUB AND KNUCKLE

FAX-5

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FAX

●

When it is hard to remove wheel hub and bearing assembly
from strut assembly due to burnout, use a sliding hammer
(special service tool) for removal.

7.

Remove fixing screws of splash guard with power tool, then
remove splash guard from strut assembly.

INSPECTION AFTER REMOVAL
Wheel Hub

●

Inspect wheel hubs for damage, seizure, and corrosion. Also check wheel hubs for cracks (using a die
test or other method). Replace if any irregular conditions are found.

Knuckle Spindle

●

Inspect knuckle spindle for damage and corrosion. If any irregular conditions are found, replace strut
assembly.

INSTALLATION

●

Refer to

FAX-4, "Removal and Installation"

for tightening torque. Tighten in the reverse order of removal.

CAUTION:

Refer to component parts location and do not reuse non-reusable parts.

●

Install hub cap using a suitable tool.

CAUTION:

Discard old hub cap; replace with new one.

●

If wheel bearing is replaced, measure hub rotating torque before
hub cap installed.
a: Turn wheel hub several times in both directions to seat wheel
bearing correctly.
b: Attach spring balance to wheel hub bolt as shown in the figure
and pull it at a speed of 10

±

2 rpm to measure rotation torque.

Tool number

: ST36230000 (J25840-A)

SDIA0279E

SDIA0280E

Standard value

Rotating torque:

0.246 - 2.108 N·m (0.03 - 0.21 kg-m, 3 - 18 in-lb)

Spring balance indication:

4.0 - 37.2 N (0.41 - 3.79 kg, 0.9 - 8.4 lb)

SDIA1358E

FAX-6

FRONT WHEEL HUB AND KNUCKLE

Disassembly and Assembly

ADS0006E

DISASSEMBLY

CAUTION:

Do not disassemble if wheel bearing has no trouble.

1.

Use a flat-bladed screwdriver or similar tool to remove grease seal from wheel hub.

2.

Using a puller (suitable tool), drift (suitable tool), and bearing
replacer (suitable tool), press wheel hub out to remove from
ABS sensor rotor.

3.

Using a snap ring plier or similar tool to remove snap ring from
wheel hub.

4.

Using a drift (special service tool), press to remove wheel bear-
ing from wheel hub.

ASSEMBLY

1.

Using a drift (suitable tool) as shown in the figure, press wheel
bearing into wheel hub.

CAUTION:

●

Discard old wheel bearing; replace with new one.

●

Do not press inner race of wheel bearing assembly.

●

Do not apply oil or grease to mating surfaces of wheel
bearing outer race and wheel hub.

NOTE:
Final press load guideline 29,420 N (3,000 kg, 6,614 lb)

2.

Using a drift (special service tool), press ABS sensor rotor into
wheel hub.

CAUTION:

Discard old ABS sensor rotor; replace with new one.

3.

Using a snap ring plier or similar tool, install snap ring into wheel
hub.

SDIA0281E

SDIA1021E

SFA332B

Tool number

: ST15310000 (J 25640-B)

SDIA0284E