Infiniti F50. Manual - part 559

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

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FAX

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

PFP:00003

NVH Troubleshooting Chart

EDS000WE

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

×

: Applicable

Reference page

F

AX-

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4

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Possible cause and SUSPECTED PARTS

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TIRES

ROAD W

H

EEL

STEERING

Symptom

FRONT AXLE

Noise

×

×

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Shake

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Vibration

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Shimmy

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Judder

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Poor quality ride or handling

×

×

×

×

×

FAX-4

FRONT WHEEL HUB AND KNUCKLE

FRONT WHEEL HUB AND KNUCKLE

PFP:40202

On-Vehicle Inspection and Service

EDS000WF

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 hub and bearing assembly.

Removal and Installation

EDS000WG

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.

Use a hub cap pliers to remove hub cap from wheel hub and bearing assembly.

4.

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

5.

Remove disc rotor.

NOTE:
If it is difficult to remove disc rotor, remove it by tapping with rubber hammer.

6.

Remove lock nut, 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.

Sensor rotor

4.

Wheel hub and bearing assembly

5.

Lock nut

6.

Hub cap

SDIA1836E

FRONT WHEEL HUB AND KNUCKLE

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●

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, then remove splash guard from strut assembly.

INSPECTION AFTER REMOVAL
Wheel hub

●

Check wheel hub 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

●

Check 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.

●

After installation of lock nut, be sure to perform caulking. Refer
to figure for caulking procedure.

Tool number

: ST3623 0000 (J25840-A)

SDIA0279E

SDIA0280E

SDIA0964E

FAX-6

FRONT WHEEL HUB AND KNUCKLE

Disassembly and Assembly

EDS000WH

DISASSEMBLY

●

As shown in the figure, use a puller (suitable tool), drift (suitable
tool), and bearing replacer (suitable tool) to remove wheel hub
and bearing assembly from ABS sensor rotor.

ASSEMBLY

1.

Press-fit ABS sensor rotor into wheel hub and bearing assembly
using a drift (suitable tool).

CAUTION:

●

Discard old ABS sensor rotor; replace with new one.

●

ABS sensor rotor must be installed with its grooved side
facing inboard.

2.

Turn wheel hub several times in both directions to seat wheel
bearing correctly.

3.

Attach spring balance to wheel hub bolt as shown at figure and
pull it at a speed of 10

±

2 rpm to measure rotation torque.

SDIA1133E

SDIA1134E

Standard value

Rotation torque:

Less than 1.49 N·m (0.15 kg-m, 13 in-lb)

Spring balance indication:

Less than 26.1 N (2.66 kg, 5.87 lb)

SDIA0286E