4WD INFINITI QX56 2011 Factory Service Manual

FAX-22
< REMOVAL AND INSTALLATION >[4WD]
FRONT DRIVE SHAFT
FRONT DRIVE SHAFT
Exploded ViewINFOID:0000000006225402
Removal and InstallationINFOID:0000000006225403
REMOVAL
1. Remove tires.
2. Remove brake hose bracket. Refer to
BR-23, "
FRONT : Removal and Installation".
3. Remove caliper assembly mounting bolts. Hang caliper assembly in a place where it will not interfere with work. Refer to BR-37, "
BRAKE CALIPER ASSEMBLY : Removal and Installation".
CAUTION:
Never depress brake pedal while brake caliper is removed.
4. Remove disc rotor. Refer to FAX-18, "
Removal and Installation".
5. Remove wheel sensor harness. Refer to BRC-134, "
FRONT WHEEL SENSOR : Removal and Installa-
tion".
CAUTION:
Never pull on wheel sensor harness.
6. Remove height sensor from upper link (right side). Refer to EXL-136, "
Removal and Installation".
7. Remove steering outer socket. Refer to ST-42, "
Removal and Installation".
8. Set suitable jack under lower link.
9. Remove shock absorber mounting bolt from lower link. Refer to FSU-10, "
Removal and Installation".
10. Separate upper link from steering knuckle, using t he ball joint remover (commercial service tool), and
remove upper link.
CAUTION:
 Temporarily tighten the nut to prevent damage to threads and to prevent the ball joint remover
from suddenly coming off.
1. Circular clip 2. Dust shield 3. Housing
4. Snap ring 5. Ball cage/steel ball/inner race assem-
bly6. Stopper ring
7. Boot band 8. Boot 9. Shaft
10. Circular clip 11. Joint sub-assembly : Wheel side
: NISSAN genuine grease or an equivalent.
Refer to GI-4, "
Components" for symbols not described on the above.
JPDIF0279ZZ
Revision: 2010 May2011 QX56

FRONT DRIVE SHAFTFAX-23
< REMOVAL AND INSTALLATION > [4WD]
C
EF
G H
I
J
K L
M A
B
FA X
N
O P
 Never damage ball joint boot.
11. Remove cotter pin, and then loosen wheel hub lock nut.
12. Patch wheel hub lock nut with a piece of wood. Hammer the wood to disengage wheel hub and bearing assembly from drive shaft.
CAUTION:
 Never place drive shaft joint at an extreme angle. Also be careful not to overextend slide joint.
 Never allow drive shaft to hang down without support for or joint sub-assembly, shaft and the
other parts.
NOTE:
Use suitable puller, if wheel hub and bearing assembly and drive shaft cannot be separated even after
performing the above procedure.
13. Remove wheel hub lock nut.
14. Remove fender protector. Refer to EXT-23, "
FENDER PROTECTOR : Removal and Installation".
15. Remove drive shaft from front final drive using the drive shaft attachment [SST: KV40107500 ( −)] (A) and a sliding ham-
mer (commercial service tool) (B) while inserting tip of the drive
shaft attachment between housing and front final drive.
CAUTION:
 Never place drive shaft joint at an extreme angle when
removing drive shaft. Also be careful not to overextend
slide joint.
 Confirm that the circular clip is attached to the drive shaft.
16. Perform inspection after removal. Refer to FAX-28, "
Inspection".
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
Always replace final drive side oil seal with new one when installing drive shaft. Refer to DLN-160,
"Removal and Installation"
 Place the protector [SST: KV38106300 (−)] (A) onto final drive
to prevent damage to the oil seal while inserting drive shaft. Slide
drive shaft sliding joint and tap with a hammer to install securely.
CAUTION:
Check that circular clip is completely engaged.
 Use the following torque range for tightening the wheel hub lock nut.
CAUTION:
 Since the drive shaft is assembled by press-fitting, use the tightening torque range for the wheel hub lock nut.
 Be sure to use torque wrench to tighten th e wheel hub lock nut. Never use a power tool.
 Perform the final tightening of each of parts under unladen conditions, which were removed when removing
wheel hub and bearing assembly and steering knuckle.
 Never reuse cotter pin.
 Perform inspection after installation. Refer to FAX-28, "
Inspection".
WHEEL SIDE
WHEEL SIDE : Disassembly and AssemblyINFOID:0000000006225404
DISASSEMBLY
1. Fix shaft with a vise.
CAUTION:
Protect shaft when fixing with a vi se using aluminum or copper plates.
2. Remove dust shield from joint sub-assembly.
3. Remove boot bands and then remove boot from joint sub-assembly.
JPDIF0004ZZ
: 118 – 123 N·m (12.1 – 12.5 kg-m, 87 – 90 ft-lb)
JPDIF0023ZZ
Revision: 2010 May2011 QX56

FAX-24
< REMOVAL AND INSTALLATION >[4WD]
FRONT DRIVE SHAFT
4. Screw the drive shaft puller (commercial service tool) (A) 30 mm
(1.18 in) or more into the thread of joint sub-assembly, and pull
joint sub-assembly from shaft.
CAUTION:
 If joint sub-assembly cannot be removed after five ormore unsuccessful attempts, replace shaft and joint sub
assembly as a set.
 Align drive shaft puller an d drive shaft and remove them
by pulling directory.
5. Remove circular clip from shaft.
6. Remove boot from shaft.
7. Perform inspection after disassembly. Refer to FAX-28, "
Inspec-
tion".
ASSEMBLY
1. While rotating ball cage, clean old grease on joint sub-assembly with paper waste.
2. Fill serration slot joint sub-assembly (1) with NISSAN genuine
grease or equivalent until the serration slot and ball groove
become full to the brim.
CAUTION:
After applying grease, use a sh op cloth to wipe off old
grease that has oozed out.
3. Install boot and boot bands to shaft. CAUTION:
 Wrap serration on shaft with tape (A) to protect the boot
from damage.
 Never reuse boot and boot band.
4. Remove the tape wrapped around the serration on shaft.
5. Position circular clip on groove at the shaft edge. CAUTION:
Never reuse circular clip.
NOTE:
Drive joint inserter is recommended when installing circular clip.
6. Align both center axles of the shaft edge and joint sub-assembly. Then assemble shaft with joint sub-assembly holding circular clip.
7. Install joint sub-assembly to shaft using plastic hammer. CAUTION:
Confirm that joint sub-assembly is correctly engaged while
rotating drive shaft.
8. Apply the specified amount of grease into the boot inside from large diameter side of boot.
JPDIG0151ZZ
JPDIF0008ZZ
Grease amount : Refer to FAX-29, "Drive Shaft".
JPDIF0009ZZ
RAC0049D
Revision: 2010 May2011 QX56

FRONT DRIVE SHAFTFAX-25
< REMOVAL AND INSTALLATION > [4WD]
C
EF
G H
I
J
K L
M A
B
FA X
N
O P
9. Install the boot securely into grooves (indicated by “*” marks) shown in the figure.
CAUTION:
If grease adheres to the boot mounting surface (indicated
by “*” mark) on the shaft or housing, boot may come off.
Remove all grease from the surfaces.
10. To prevent the deformation of the boot, adjust the boot installa- tion length (L) to the specified value shown below by inserting
the suitable tool into inside of the boot from the large diameter
side of boot and discharging the inside air.
CAUTION:
 If the boot installation length is outsid e the standard, it may cause breakage of boot.
 Be careful not to touch the inside of the boot with the tip of tool.
11. Install new boot bands securely. CAUTION:
Never reuse boot band.
a. Small boot band
i. Secure the ends of the boot with boot bands using the boot band crimping tool [SST: KV40107300 ( −)] (A).
CAUTION:
Secure boot band so that dimension (M) meets the specifi-
cation as shown in the figure.
b. Large boot band
i. Put boot band in the groove on drive shaft boot. Then fit pawls ( ) into holes to temporary installation.
NOTE:
For the large diameter side, fit projection (A) and guide slit (B) at
first.L : Refer to
FAX-29, "
Drive Shaft".
JPDIG0136ZZ
PDIA1187J
M : 1.0 – 4.0 mm (0.039 – 0.157 in)
DSF0047D
SDIA3557E
Revision: 2010 May2011 QX56

FAX-26
< REMOVAL AND INSTALLATION >[4WD]
FRONT DRIVE SHAFT
ii. Pinch projection on the band with suitable pliers to tighten band.
iii. Insert tip of band below end of the pawl.
12. Secure joint sub-assembly and shaft, and then check that they
are in the correct position when rotating boot. Install them with
boot band when boot installation positions become incorrect.
CAUTION:
Never reuse boot band.
13. Install dust shield to joint sub-assembly. CAUTION:
Never reuse dust shield.
FINAL DRIVE SIDE
FINAL DRIVE SIDE : Disa ssembly and AssemblyINFOID:0000000006225405
DISASSEMBLY
1. Fix shaft with a vise.
CAUTION:
Protect shaft when fixing with a vi se using aluminum or copper plates.
2. Remove circular clip from housing.
3. Remove dust shield from housing.
4. Remove boot bands, and then remove boot from housing.
5. Put matching marks on housing and shaft. CAUTION:
Use paint or similar substance for matc hing marks. Never scratch the surface.
6. Remove stopper ring with suitable tool, and pull out housing.
7. Put matching marks on ball cage/steel ball/inner race assembly and shaft.
CAUTION:
Use paint or similar substance for matching marks. Never
scratch the surface.
8. Remove snap ring, then remove ball cage/steel ball/inner race assembly from shaft.
9. Remove boot from shaft.
10. Perform inspection after disassembly. Refer to FAX-28, "
Inspec-
tion".
ASSEMBLY
1. Remove old grease on housing with paper waste.
SDIA3558E
JPDIG0177ZZ
SFA514A
Revision: 2010 May2011 QX56

FRONT DRIVE SHAFTFAX-27
< REMOVAL AND INSTALLATION > [4WD]
C
EF
G H
I
J
K L
M A
B
FA X
N
O P
2. Install boot and boot bands to shaft. CAUTION:
 Wrap serration on shaft with tape (A) to protect the bootfrom damage.
 Never reuse boot and boot band.
3. Remove the tape wrapped around the serration on shaft.
4. Install ball cage/steel ball/inner race assembly (1), align it with the matching marks on shaft (2) put during the removal.
5. Secure ball cage/steel ball/inner race assembly onto shaft with snap ring (3).
CAUTION:
Never reuse snap ring.
6. Apply the appropriate amount of grease onto housing and slid- ing surface.
7. Install housing to shaft.
8. Install stopper ring to housing. CAUTION:
Never reuse stopper ring.
9. After installed, pull shaft to check engagement between housing and stopper ring.
10. Install boot securely into grooves (indicated by “*” marks) shown in the figure.
CAUTION:
If grease adheres to the bo ot mounting surfaces (indicated
by “*” marks) on shaft or housing, boot may be removed.
Remove all grease from the surfaces.
11. To prevent deformation of the boot, adjust the boot installation
length (L) to the value shown below by inserting the suitable tool
into the inside of boot from the large diameter side of boot and
discharging inside air.
CAUTION:
 If the boot installation length is outsid e the standard, it may cause breakage of boot.
 Be careful not to touch the inside of the boot with the tip of tool.
12. Install boot bands securely as shown in the figure. CAUTION:
Never reuse boot band.
13. Secure housing and shaft, and then check that they are in the correct position when rotating boot. Install them with boot band
when the mounting positions become incorrect.
CAUTION:
Never reuse boot band.
14. Install dust shield to housing. CAUTION:
Never reuse dust shield.
15. Install circular clip to housing. CAUTION:
Never reuse circular clip.
JPDIF0009ZZ
Grease amount : Refer to FAX-29, "Drive Shaft".
L : Refer to FAX-29, "
Drive Shaft".
JPDIG0004ZZ
JPDIF0224ZZ
PDIA1188J
Revision: 2010 May2011 QX56

FAX-28
< REMOVAL AND INSTALLATION >[4WD]
FRONT DRIVE SHAFT
Inspection
INFOID:0000000006225406
INSPECTION AFTER REMOVAL
 Move joint up/down, left/right, and in the axial directi ons. Check for motion that is not smooth and for signifi-
cant looseness.
 Check boot for cracks, damage, and leakage of grease.
 Disassemble drive shaft and exchange malfunctioning part if there is a non-standard condition.
INSPECTION AFTER DISASSEMBLY
Shaft
Check shaft for runout, cracks, or ot her damage. Replace it if necessary.
Joint Sub-Assembly (Wheel Side)
Check the following items, replace the parts if necessary.
 Joint sub-assembly for rough rotation and excessive axial looseness.
 The inside of the joint sub-assembly for entry of foreign material.
 Joint sub-assembly for compression scars, cra cks, and fractures inside of joint sub-assembly.
Replace joint sub-assembly if there are any non-standard conditions of components.
Housing (Final Drive side)
Replace housing if there is scratching or wear of housing roller contact surface.
INSPECTION AFTER INSTALLATION
1. Check wheel sensor harness for proper connection. Refer to BRC-134, "FRONT WHEEL SENSOR :
Exploded View".
2. Check the wheel alignment. Refer to FSU-7, "
Inspection".
3. Adjust neutral position of steering angle sensor. Refer to BRC-64, "
Work Procedure".
4. Adjust levelizer adjustment of height sensor. Refer to EXL-61, "
LEVELIZER ADJUSTMENT : Special
Repair Requirement".
SDIA1163J
Revision: 2010 May2011 QX56

SERVICE DATA AND SPECIFICATIONS (SDS)
FAX-29
< SERVICE DATA AND SPECIFICATIONS (SDS) [4WD]
C
EF
G H
I
J
K L
M A
B
FA X
N
O P
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Wheel Hub and Bearing AssemblyINFOID:0000000006225407
Drive ShaftINFOID:0000000006225408
Item Standard
Axial end play 0.05 mm (0.002 in) or less
ItemStandard
Wheel side Final drive side
Grease quantity 205 – 225 g (7.23 – 7.94 oz) 130 – 150 g (4.59 – 5.29 oz)
Boots installed length 157.8 mm (6.21 in) 196.4 mm (7.73 in)
Revision: 2010 May2011 QX56

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGFSU-5
< SYMPTOM DIAGNOSIS >
C
DF
G H
I
J
K L
M A
B
FSU
N
O P
SYMPTOM DIAGNOSIS
NOISE, VIBRATION AND HARSHN ESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000006225638
Use chart below to find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
FSU-9
,
FSU-14
, FSU-17
FSU-12
—
—
—
FSU-9
, FSU-14
, FSU-17
FSU-7FSU-20
NVH in DLN section.
NVH in DLN section.
NVH in FAX and FSU sections.
NVH in WT section.
NVH in WT section.
NVH in FAX section.
NVH in BR section.
NVH in ST section.
Possible cause and SUSPECTED PARTS
Improper installation, looseness
Shock absorber deformation, damage or deflection
Bushing or mounting deterioration
Parts interference
Spring fatigue
Suspension looseness
Incorrect wheel alignment
Stabilizer bar fatigue
PROPELLER SHAFT
DIFFERENTIAL (4WD)
FRONT AXLE AND FRONT SUSPENSION
TIRE
ROAD WHEEL
DRIVE SHAFT (4WD)
BRAKE
STEERING
Symptom FRONT SUSPENSION Noise
×××××× ××××××××
Shake ×××× × × ××××××
Vibration ××××× × ×× × ×
Shimmy ×××× × ××× ××
Judder ××× ××× ××
Poor quality ride or
handling ××××× ×× ×××
Revision: 2010 May2011 QX56

WHEEL ALIGNMENTFSU-7
< PERIODIC MAINTENANCE >
C
DF
G H
I
J
K L
M A
B
FSU
N
O P
WHEEL ALIGNMENT
InspectionINFOID:0000000006225640
DESCRIPTION
Measure wheel alignment under unladen conditions.
NOTE:
“Unladen conditions” means that fuel, engine coolant, and lubricant are full. Spare tire, jack, hand tools and
mats are in designated positions.
PRELIMINARY CHECK
Check the following:
 Tires for improper air pressure and wear
 Road wheels for runout: Refer to WT-64, "
Inspection".
 Wheel bearing axial end play: Refer to FA X - 7 , "
Inspection" (2WD), FAX-16, "Inspection" (4WD).
 Lower link and upper link ball joint axial end play: Refer to FSU-15, "
Inspection" and FSU-18, "Inspection".
 Shock absorber operation.
 Each mounting part of axle and suspension for looseness and deformation
 Lower link for cracks, deformation and other damage
 Vehicle height (posture)
GENERAL INFORMATION AND RECOMMENDATIONS
 A four-wheel thrust alignment should be performed.
- This type of alignment is recomm ended for any NISSAN/INFINITI vehicle.
- The four-wheel “thrust” process helps ensure that t he vehicle is properly aligned and the steering wheel is
centered.
- The alignment rack itself should be capable of accepting any NISSAN/INFINITI vehicle.
- The rack should be checked to ensure that it is level.
 Make sure the machine is properly calibrated.
- Your alignment equipment should be regularly ca librated in order to give correct information.
- Check with the manufacturer of your specific equi pment for their recommended Service/Calibration Sched-
ule.
ALIGNMENT PROCESS
IMPORTANT:
Use only the alignment specificati ons listed in this Service Manual.
 When displaying the alignment settings, many alignment machines use “indicators”: (Green/red, plus or
minus, Go/No Go). Never use these indicators.
- The alignment specifications programmed into your machine that operate these indicators may not be cor-
rect.
- This may result in an ERROR.
 Some newer alignment machines are equipped with an optional “Rolling Compensation” method to “com-
pensate” the sensors (alignment targets or head units). Never use this “Rolling Compensation” method.
- Use the “Jacking Compensation Method”. After installi ng the alignment targets or head units, raise the vehi-
cle and rotate the wheels 1/2 turn both ways.
- See Instructions in the alignment machine you're using for more information on this.
AdjustmentINFOID:0000000006225641
CAMBER, CASTER
1. Adjust with the front/rear side adjusting bolts (1) on the lower link
(2).
2. See the following table for the amount of cam bolt scale move- ment and the variation of camber and caster.
CAUTION:
Align the adjusting bolt cutout with the stamp of lower link
bracket.
: Vehicle front
JPEIA0235ZZ
Revision: 2010 May2011 QX56