INFINITI QX56 2009 Factory Service Manual

UPPER BALL JOINT AND LOWER BALL JOINTFSU-11
< ON-VEHICLE MAINTENANCE >
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Before checking the axial forces and end play, turn the lower ball
joint at least 10 revolutions so that the ball joint is properly broken in. Vertical end play (C) : 0 mm (0 in)
SFA858A
Revision: December 20092009 QX56

FSU-12
< ON-VEHICLE MAINTENANCE >
KNUCKLE
KNUCKLE
On-Vehicle Inspection and ServiceINFOID:0000000003772272
Make sure the mounting conditions (looseness, backlash) of each component and component status (wear,
damage) are within specifications. Refer to FSU-24, "
Ball Joint" .
Revision: December 20092009 QX56

FRONT SUSPENSION ASSEMBLYFSU-13
< ON-VEHICLE REPAIR >
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ON-VEHICLE REPAIR
FRONT SUSPENSION ASSEMBLY
ComponentINFOID:0000000003772273
1. Dust cover 2. Shock absorber 3. Upper link
4. Steering knuckle 5. Cotter pin 6. Bolt
7. Jounce bumper 8. Washer 9. Lower link
10. Stabilizer bar 11. Stabilizer bar bushing 12. Stabilizer bar mounting bracket
13. Connecting rod 14. Coil spring 15. Upper seat
16. Upper spring seat 17. Shock absorber bushing 18. Shock absorber mounting insulator
19. Spacer 20. Washer Front
AWEIA0142GB
Revision: December 20092009 QX56

FSU-14
< REMOVAL AND INSTALLATION >
COIL SPRING AND SHOCK ABSORBER
REMOVAL AND INSTALLATION
COIL SPRING AND SHOCK ABSORBER
Removal and InstallationINFOID:0000000003772274
REMOVAL
1. Remove the wheel and tire using power tool.
2. Remove the shock absorber lower bolt using power tool.
3. Remove the three shock absorber upper nuts using power tool.
4. Remove the coil spring and shock absorber assembly.• Turn steering knuckle out to gain enough clearance forremoval.
INSTALLATION
Installation is in the reverse order of removal.
• The lower seat step (2) in the shock absorber assembly (1) faces
outside of vehicle.
- Upper spring insulator (3)
- : Front
• Tighten all nuts and bolts to specification. Refer to FSU-13, "
Com-
ponent" .
• When installing wheel and tire, refer to WT-41, "
Adjustment".
DisposalINFOID:0000000005867502
1. Set shock absorber horizontally with the piston rod fully extended.
2. Drill 2 – 3 mm (0.08 – 0.12 in) hole at the position ( ) from top
as shown in the figure to release gas gradually.
CAUTION:
• Wear eye protection (safety glasses).
• Wear gloves.
• Be careful with metal chips or oil blown out by the com-pressed gas.
NOTE:
• Drill vertically in this direction ( ).
• Directly to the outer tube avoiding brackets.
• The gas is clear, colorless, odorless, and harmless.
3. Position the drilled hole downward and drain oil by moving the piston rod several times. CAUTION:
Dispose of drained oil according to the law and local regulations.
LEIA0093E
WEIA0155E
A : 20 – 30 mm (0.79 – 1.18 in)
JPEIA0161ZZ
Revision: December 20092009 QX56

STABILIZER BARFSU-15
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STABILIZER BAR
Removal and InstallationINFOID:0000000003772275
REMOVAL
1. Remove engine under cover using power tool.
2. Remove stabilizer bar mounting bracket bolts and connecting rod nuts using power tool, as shown.
3. Remove bushings from stabilizer bar.
INSPECTION AFTER REMOVAL
• Check stabilizer bar for twist and deformation. Replace if necessary.
• Check rubber bushing for cracks, wear and deterioration. Replace if necessary.
INSTALLATION
Installation is in the reverse order of removal.
• Tighten all nuts and bolts to specification. Refer to FSU-13, "
Component" .
LEIA0094E
Revision: December 20092009 QX56

FSU-16
< REMOVAL AND INSTALLATION >
UPPER LINK
UPPER LINK
Removal and InstallationINFOID:0000000003772276
REMOVAL
1. Remove the wheel and tire using power tool.
2. Remove the fender protector to access upper link. Refer to EXT-23, "
Removal and Installation" .
3. Remove cotter pin and nut from upper link ball joint and discard the cotter pin.
4. Separate upper link ball joint stud from steering knuckle using Tool.
• Support lower link with jack.
5. Remove upper link bolts and nuts, then remove upper link.
INSPECTION AFTER REMOVAL
Upper Link
Check for deformation and cracks. Replace if necessary.
Upper Link Ball Joint
Check for distortion and damage. Replace if necessary.
INSTALLATION
Installation is in the reverse order of removal.
• Tighten all nuts and bolts to specification. Refer to FSU-13, "
Component".
CAUTION:
Use a new cotter pin for installation of upper link ball joint nut.
• When installing wheel and tire, refer to WT-41, "
Adjustment".
• After installation, check that the front wheel alignment is within specification. Refer to FSU-6, "
Front Wheel
Alignment" .
Tool number : ST29020001 (J-24319-01)
LEIA0095E
LEIA0096E
Revision: December 20092009 QX56

LOWER LINKFSU-17
< REMOVAL AND INSTALLATION >
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LOWER LINK
Removal and InstallationINFOID:0000000003772277
REMOVAL
1. Remove the wheel and tire using power tool.
2. Remove lower shock absorber bolt.
3. Remove stabilizer bar connecting rod lower nut using power tool, then separate connecting rod from lower
link. Refer to FSU-15, "
Removal and Installation".
4. Remove drive shaft nut, if equipped. Refer to FA X - 9 , "
Removal and Installation".
5. Remove pinch bolt from steering knuckle using power tool, then separate lower link ball joint from steering knuckle.
6. Remove lower link bolts (1) and nuts, then the lower link (2). NOTE:
Some vehicles may be equipped with straight (non-adjustable)
lower link bolts and washers. In order to adjust camber and
caster on these vehicles, first replace the lower link bolts and
washers with adjustable (cam) bolt and washers.
INSPECTION AFTER REMOVAL
Lower Link
Check for deformation and cracks. Replace if necessary.
Lower Link Bushing
Check for distortion and damage. Replace if necessary.
INSTALLATION
Installation is in the reverse order of removal.
• Tighten all nuts and bolts to specification. Refer to FSU-13, "
Component".
• When installing wheel and tire, refer to WT-41, "
Adjustment".
• After installation, check that the front wheel alignment is within specification. Refer to FSU-6, "
Front Wheel
Alignment".
LEIA0097E
WEIA0153E
Revision: December 20092009 QX56

FSU-18
< REMOVAL AND INSTALLATION >
UPPER BALL JOINT AND LOWER BALL JOINT
UPPER BALL JOINT AND LOWER BALL JOINT
Removal and InstallationINFOID:0000000003772278
The ball joints are part of the upper and lower links. Refer to FSU-16, "Removal and Installation" (upper link),
FSU-17, "
Removal and Installation" (lower link).
Revision: December 20092009 QX56

KNUCKLEFSU-19
< REMOVAL AND INSTALLATION >
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KNUCKLE
Removal and InstallationINFOID:0000000003772279
REMOVAL
1. Remove wheel hub and bearing assembly. Refer to FAX-7, "Removal and Installation".
• Disconnect wheel sensor harness connector. Do not remove wheel sensor from wheel hub and bearing
assembly for this procedure.
2. Remove steering outer socket from steering knuckle using Tool. CAUTION:
• Be careful not to damage ball joint boot.
• Temporarily tighten nut to prevent damage to threads andto prevent Tool from coming off.
3. Remove the coil spring and shock absorber assembly using power tool. Refer to FSU-14, "
Removal and
Installation".
4. Support lower link using a suitable jack.
5. Remove cotter pin and nut from upper link ball joint and discard the cotter pin.
6. Separate upper link ball joint from steering knuckle using Tool.
1. Disc rotor 2. Wheel hub and bearing assembly 3. Wheel stud
4. Splash guard 5. Steering knuckle Front
AWDIA0423GB
Tool number : HT72520000 (J-25730-A)
WGIA0130E
Tool number : ST29020001 (J-24319-01)
LEIA0095E
Revision: December 20092009 QX56

FSU-20
< REMOVAL AND INSTALLATION >
KNUCKLE
7. Remove pinch bolt from steering knuckle using power tool, thenseparate lower link ball joint from steering knuckle.
8. Remove steering knuckle from vehicle.
INSPECTION AFTER REMOVAL
Check for deformity, cracks and damage on each part, replace if necessary.
• Perform ball joint inspection. Refer to FSU-10, "
Inspection".
INSTALLATION
Installation is in the reverse order of removal.
• Refer to FSU-13, "
Component" for tightening torques.
CAUTION:
Use a new cotter pin for installation of lock nut.
• When installing disc rotor on wheel hub and bearing assembly, align the marks.
NOTE:
When not using the alignment mark, refer to BR-7, "
DISC ROTOR
: Inspection".
• When installing wheel and tire, refer to WT-41, "
Adjustment".
LEIA0097E
WDIA0044E
Revision: December 20092009 QX56