Oil INFINITI QX56 2010 Factory Service Manual

DLN-246
< ON-VEHICLE REPAIR >[REAR FINAL DRIVE: R230]
FRONT OIL SEAL
1. Apply multi-purpose grease to the lips of the new front oil seal.
Then drive the new front oil seal in evenly until it becomes flush
with the gear carrier using Tool.
CAUTION:
• Do not reuse front oil seal.
• Do not incline the new front oil seal when installing.
• Apply multi-purpose grease to the lips of the new front oilseal.
2. Install the companion flange to the drive pinion while aligning the matching marks.
3. Apply anti-corrosive oil to the threads of the drive pinion and the seating surface of the new drive pinion lock nut. Then adjust the
drive pinion lock nut tightening torque using suitable tool (A),
and check the total preload torque using Tool (B).
• The total preload torque should be within the total preloadtorque specification. When not replacing the collapsible
spacer, it should also be equal to the measurement taken dur-
ing removal plus an additional 0.56 N·m (0.06 Kg-m, 5 in-lb).
• If the total preload torque is low, tighten the drive pinion lock nut in 6.8 N·m (0.69 Kg-m, 5ft-lb) increments until the total pre-
load torque is met.
CAUTION:
• Do not reuse drive pinion lock nut.
• Apply anti-corrosive oil to the threads of the drive pinion and the seating surface of the new drive pinion lock nut.
• Adjust the drive pinion lock nut tightening torque to the
lower limit first. Do not exceed the drive pinion lock nut
specified torque. Refer to DLN-253, "
Disassembly and
Assembly".
• Do not loosen drive pinion lock nu t to adjust the total preload torque. If the total preload torque
exceeds the specifications, replace the collapsible spacer and tighten it again to adjust. Refer to
DLN-253, "
Disassembly and Assembly".
• After adjustment, rotate drive pinion back and fo rth 2 to 3 times to check for unusual noise, rota-
tion malfunction, and other malfunctions.
4. Installation of the remaining components is in the reverse order of removal. CAUTION:
Check the differential gear oil level after installation. Refer to DLN-244, "
Checking Rear Differential
Gear Oil".
Tool number : ST15310000 ( — )
PDIA0565E
Tool number B: ST3127S000 (J-25765-A)
Total preload torque: Refer to
DLN-253, "
Disassem-
bly and Assembly".
WDIA0380E
Revision: April 20092010 QX56

SIDE OIL SEALDLN-247
< ON-VEHICLE REPAIR > [REAR FINAL DRIVE: R230]
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SIDE OIL SEAL
Removal and InstallationINFOID:0000000005148933
REMOVAL
1. Remove the drive shaft from the rear final drive assembly. Refer to RAX-10, "Removal and Installation".
2. Remove the side flange using Tools.
3. Remove the side oil seal using suitable tool. CAUTION:
Do not to damage gear carrier.
INSTALLATION
1. Apply multi-purpose grease to the lips of the new side oil seal.
Then drive the new side oil seal in evenly until it becomes flush
with the gear carrier using Tool.
CAUTION:
• Do not reuse side oil seal.
• Do not incline the new side oil seal when installing.
• Apply multi-purpose grease to the lips of the new side oil seal.
2. Install the side flange using Tool.
a. Install the Tool to the side oil seal as shown.
b. Insert the side flange until the serrated part of the side flange has engaged the serrated part of the side gear and remove the
Tool.
c. Drive in the side flange using suitable tool. NOTE:
Installation is completed when the driving sound of the side
flange turns into a sound which seems to affect the whole rear
final drive assembly.
3. Installation of the remaining components is in the reverse order of removal. CAUTION:Tool numbers A: KV40104100 ( — )
B: ST36230000 (J-25840-A)
WDIA0115E
LDIA0109E
Tool number : KV38100200 (J-26233)
LDIA0111E
Tool number : KV38107900 (J-39352)
SDIA0822E
Revision: April 20092010 QX56

DLN-248
< ON-VEHICLE REPAIR >[REAR FINAL DRIVE: R230]
SIDE OIL SEAL
Check the differential gear oil level
after installation. Refer to DLN-244, "Checking Rear Differential
Gear Oil".
Revision: April 20092010 QX56

CARRIER COVERDLN-249
< ON-VEHICLE REPAIR > [REAR FINAL DRIVE: R230]
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CARRIER COVER
Removal and InstallationINFOID:0000000005148934
REMOVAL
1. Remove the rear final drive assembly. Refer to DLN-250, "Removal and Installation".
2. Remove the carrier cover bolts and separate the carrier cover from the gear carrier using Tool.
CAUTION:
• Do not damage the mating surface.
• Do not insert flat-bladed screw driver, this will damage the
mating surface.
INSTALLATION
1. Apply a 3 mm (0.12 in) bead of sealant to the mating surface of the carrier cover as shown.
• Use Genuine Silicone RTV or equivalent. Refer to GI-15,
"Recommended Chemical Products and Sealants".
CAUTION:
Remove any old sealant adheri ng to the mating surfaces.
Also remove any moisture, oil, or foreign material adhering
to the application and mating surfaces.
2. Install the carrier cover to the gear carrier. Tighten the bolts to the specified torque. Refer to DLN-253, "
Disassembly and
Assembly".
3. Install the rear final drive assembly. Refer to DLN-250, "
Removal
and Installation".
CAUTION:
Fill the rear final drive assembly with reco mmended differential gear oil. Refer to DLN-244
.
Tool number : KV10111100 (J-37228)
WDIA0123E
WDIA0282E
Revision: April 20092010 QX56

DLN-250
< REMOVAL AND INSTALLATION >[REAR FINAL DRIVE: R230]
REAR FINAL DRIVE
REMOVAL AND INSTALLATION
REAR FINAL DRIVE
Removal and InstallationINFOID:0000000005148935
REMOVAL
1. Remove the spare tire.
2. Drain the differential gear oil. Refer to
DLN-244, "
Changing Rear Differential Gear Oil".
3. Remove the rear stabilizer bar. Refer to RSU-23, "
Removal and Installation".
4. Remove the rear propeller shaft. Refer to DLN-196, "
Removal and Installation".
5. Remove the rear drive shafts from the rear final drive assembly and support them using suitable wire. Refer to RAX-10,
"Removal and Installation".
6. Disconnect the breather hose from the rear final drive assembly.
1. Rear final drive assembly 2. Upper stopper3. Washer
4. Lower stopper Vehicle front
WDIA0383E
LDIA0164E
Revision: April 20092010 QX56

DLN-252
< REMOVAL AND INSTALLATION >[REAR FINAL DRIVE: R230]
REAR FINAL DRIVE
REAR FINAL DRIVE BREATHER
• Fill the rear final drive assembl
y with differential gear oil after installation. Refer to DLN-244.
ALDIA0210GB
1. Rear final drive breather hose connector 2. Plastic clip 3. Rear final drive breather tube
4. Rear final drive assembly 5. Rear suspension member 6. Rear final drive breather hose
7. Parking brake cable 8. Exhaust pipe9. Frame (LH)
10. Rear final drive breather hose frame connector A. Close-up view
Front
Revision: April 20092010 QX56

DLN-254
< DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
REAR FINAL DRIVE
ASSEMBLY INSPECTION AND ADJUSTMENT
• Drain the differential gear oil before inspection and adjustment. Refer to
DLN-244.
• Remove and install the carrier cover as necessary for inspection and adjustment. Refer to DLN-249
.
Total Preload Torque
1. Remove the side flanges if necessary. Refer to DLN-247, "Removal and Installation".
CAUTION:
The side flanges must removed in or der to measure total preload torque.
2. Rotate the drive pinion back and forth 2 to 3 times to check for unusual noise and rotation malfunction.
3. Rotate the drive pinion at least 20 times to check for smooth operation of the bearings.
4. Measure the total preload torque using Tool.
NOTE:
Total preload torque = Drive pinion bearing preload torque +
Side bearing preload torque
• If the measured value is out of the specification, check and adjust each part. Adjust the drive pinion
bearing preload torque first, then adjust the side bearing preload torque.
CAUTION:
Select a side bearing adjusting wash er for right and left individually.
Drive Gear Runout
1. Drive pinion lock nut 2. Companion flange3. Front oil seal
4. Drive pinion front bearing 5. Collapsible spacer6. Drive pinion rear bearing
7. Drive pinion height adjusting washer 8. Drive pinion 9. Gear carrier
10. Drive gear 11. Pinion mate shaft12. Lock pin
13. Pinion mate gear 14. Pinion mate thrust washer 15. Side gear
16. Side gear thrust washer 17. Differential case18. Side bearing
19. Side bearing adjusting washer 20. Bearing cap 21. Carrier cover
22. Filler plug 23. Drain plug24. Side oil seal
Tool number : ST3127S000 (J-25765-A)
Total preload torque
: Refer to DLN-270, "
Inspection and Adjustment"
SPD884
If the total preload torque is greater than specification
On drive pinion bearings: Replace the collapsible spacer.
On side bearings: Use thinner side b earing adjusting washers by the same
amount on each side. Refer to DLN-270, "
Inspection and Adjust-
ment".
If the total preload torque is less than specification On drive pinion bearings: Tighten the drive pinion lock nut.
On side bearings: Use thicker side b earing adjusting washers by the same
amount on each side. Refer to DLN-270, "
Inspection and Ad-
justment".
Revision: April 20092010 QX56

REAR FINAL DRIVEDLN-257
< DISASSEMBLY AND ASSEMBLY > [REAR FINAL DRIVE: R230]
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1. Rotate companion flange and check for runout on the outer face of the companion flange using suitable tool.
2. If the runout is outside of the runout limit, follow the procedure
below to adjust.
a. Rotate the companion flange on the drive pinion by 90 °, 180 °
and 270 ° while checking for the position where the runout is
minimum.
b. If the runout is still outside of the runout limit after the companion
flange has been rotated on the drive pinion, possible c ause could be an assembly malfunction of drive pin-
ion and drive pinion bearing or a malfunctioning drive pinion bearing.
c. If the runout is still outside of t he runout limit after repair of the assembly of drive pinion and drive pinion
bearing or drive pinion bearing, replace the companion flange.
DISASSEMBLY
Side Flange
1. Drain the differential gear oil if necessary.
2. Remove the side flange using Tools.
3. Remove the side oil seal using suitable tool. CAUTION:
Do not to damage gear carrier.
Differential Assembly
1. Remove the side flanges.
2. Remove the carrier cover bolts.
3. Remove the carrier cover bolts and separate the carrier coverfrom the gear carrier using Tool.
CAUTION:
• Do not damage the mating surface.
• Do not insert flat-bladed screw driver, this will damage the
mating surface. Runout limit : Refer to
DLN-270, "
Inspection and
Adjustment"
WDIA0231E
Tool numbers A: KV40104100 ( — )
B: ST36230000 (J-25840-A)
WDIA0115E
LDIA0109E
Tool number : KV10111100 (J-37228)
WDIA0123E
Revision: April 20092010 QX56

REAR FINAL DRIVEDLN-261
< DISASSEMBLY AND ASSEMBLY > [REAR FINAL DRIVE: R230]
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5. Press the drive pinion assembly (with rear inner bearing race and collapsible spacer) out of the gear carrier.
CAUTION:
Do not drop drive pinion assembly.
6. Remove the front oil seal. CAUTION:
Do not damage gear carrier.
7. Remove the drive pinion front bearing inner race.
8. Remove the drive pinion rear bearing inner race and drive pinion height adjusting washer using Tool.
9. Remove the drive pinion front and rear bearing outer races by tapping them uniformly using suitable tool.
CAUTION:
Do not damage gear carrier.
INSPECTION AFTER DISASSEMBLY
Clean the disassembled parts. Then inspect the parts fo r wear or damage. If wear or damage are found, follow
the measures below.
Drive Pinion and Drive Gear
• If the drive pinion and drive gear teeth do not mesh or line-up correctly, determine the cause and adjust, repair, or replace as necessary.
• If the drive pinion or drive gear are worn, crack ed, damaged, pitted or chipped (by friction) noticeably,
replace with new drive pinion and drive gear.
• Drive pinion and drive gear are supplied in matched sets only. Matching numbers on both drive pinion and
drive gear are etched for verification. If a new drive pinion and drive gear set are being used, verify the num-
bers of each drive pinion and drive gear before proceeding with assembly.
Bearing
• If bearings are chipped (by friction), pitted, worn, rusted, scratched, or unusual noise is coming from bearing,replace with new bearing assembly (as a new set).
• Bearing must be replaced with a new one whenever disassembled.
Side Gear and Pinion Mate Gear
• If any cracks or damage are found on the surface of the teeth, replace with new one.
• If any worn or chipped marks are found on the side of the side gear and pinion mate gear which contact the thrust washer, replace with new one.
• Replace both side gear and pinion mate gear as a set when replacing side gear or pinion mate gear.
Side Gear Thrust Washer and Pinion Mate Thrust Washer
• If any chips (by friction), damage, or unus ual wear are found, replace with new one.
SPD892
Tool number: : ST30031000 (J-22912-01)
S-PD179
SDIA0817E
Revision: April 20092010 QX56

DLN-262
< DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
REAR FINAL DRIVE
Gear Carrier
• If any wear or cracks are found on the contact sides of gear carrier, replace with new one.
Companion Flange
• If any chips (about 0.1mm, 0.004
in) or other damage on the companion flange surface which contacts the
front oil seal lips are found, replace with new one.
ADJUSTING AND SELECTING WASHERS
Side Gear Back Clearance
• Assemble the differential parts if they are disassembled.
1. Place the differential case straight up so that the side gear to be measured is upward.
2. Using feeler gauges, measure the clearance between the side gear back and differential case at three different points, while
rotating the side gear. Average the three readings to calculate
the clearance. (Measure the clearance of the other side as well.)
• If the side gear back clearance is outside of the specification,use a thicker or thinner side gear thrust washer to adjust.
Refer to DLN-270, "
Inspection and Adjustment".
CAUTION:
• Insert feeler gauges with the same thickness on both sides to prevent side gear from tilting.
• Each gear should rotate smoothly without excessive resistance during differential motion.
• Select a side gear thrust washer for right and left individually.
NOTE:
Side gear back clearance is clearance between side gear and differential case for adjusting side gear
backlash.
Side Bearing Preload Torque
• A selection of side bearing adjusting washers is required for successful completion of this procedure.
PDIA0460E
Side gear back
clearance : Refer to
DLN-270, "Inspection
and Adjustment"
If the side gear back clearance is greater than
specification:
Use a thicker side gear thrust washer.
If the side gear back clearance is less than spec-
ification: Use a thinner side gear thrust washer.
PDIA0576E
Revision: April 20092010 QX56