torque INFINITI QX56 2010 Factory Repair Manual

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-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".
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DLN-256
< DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
REAR FINAL DRIVE
• If the tooth contact is near the face (face contact), or near the heel
(heel contact), use a thicker drive pinion height adjusting washers
to move the drive pinion closer to the drive gear.
Refer to DLN-270, "
Inspection and Adjustment".
• If the tooth contact is near the flank (flank contact), or near the toe (toe contact), use a thinner drive pinion height adjusting washers to
move the drive pinion farther from the drive gear.
Refer to DLN-270, "
Inspection and Adjustment".
Backlash
1. Fit a dial indicator to the drive gear face to measure the back- lash.
• If the backlash is outside of the specification, change the thickness of the side bearing adjusting washers.
CAUTION:
Do not change the total thickness of side bearing adjusting washers as it will change the side bearing
preload torque.
Companion Flange Runout
PDIA0440E
PDIA0441E
Backlash : Refer to DLN-270, "Inspection and
Adjustment"
If the backlash is greater than specification:
Make side bearing adjusting washer thicker on drive
gear back side, and side bearing adjusting washer
thinner on drive gear tooth side by the same amount.
Refer to DLN-270, "
Inspection and Adjustment".
If the backlash is less than specification: Make side bearing adjusting washer thinner on drive
gear back side, and side bearing adjusting washer
thicker on drive gear tooth side by the same amount.
Refer to DLN-270, "
Inspection and Adjustment".
SPD513
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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

REAR FINAL DRIVEDLN-263
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1. Apply differential gear oil to the side bearings, and install the dif- ferential case assembly with the side bearing outer races into
the gear carrier.
CAUTION:
Do not reuse side bearing ou ter race when replacing side
bearing inner race (replace as a set).
2. Insert the left and right original side bearing adjusting washers in place between side bearings and gear carrier.
3. Align the matching mark on the side bearing cap with the match- ing mark on the gear carrier.
4. Install the side bearing caps and tighten the side bearing cap bolts to the specified torque.
5. Turn the differential assembly several times to seat the side bearings.
6. To determine side bearing preload torque, measure the pulling force of the differential assembly at the drive gear bolt using
Tool.
NOTE:
If pulling force of the differential assembly at the drive gear bolt
is within specification, side bearing preload torque will also be
within specification. Refer to DLN-270, "
Inspection and Adjustment".
SPD527
SPD924
SDIA1795E
Tool number : — (J-8129)
Specification : Refer to DLN-270, "
Inspection and
Adjustment"
SPD194A
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DLN-264
< DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
REAR FINAL DRIVE
7. If the pulling force is outside the specification, use a thicker or
thinner side bearing adjusting washer to adjust. Refer to DLN-
270, "Inspection and Adjustment".
CAUTION:
Select a side bearing adjust ing washer for right and left
individually.
8. Record the total amount of washer thickness required for the correct side bearing preload torque.
ASSEMBLY
Drive Pinion Assembly
1. Install the drive pinion front and rear bearing outer races using Tools.
CAUTION:
Do not reuse drive pinion fron t and rear bearing outer race.
2. Select a drive pinion height adjusting washer. Refer to DLN-270, "
Inspection and Adjustment".
3. Install the selected drive pinion height adjusting washer to the drive pinion. Press the drive pinion rear bearing inner race to it
using Tool.
CAUTION:
• Install the drive pinion hei ght adjusting washer in the
proper direction as shown.
• Do not reuse drive pinion rear bearing inner race. If the pulling force is
less than the specification:
Use a thicker side bear ing adjusting washer.
If the pulling force is gr eater than the specification:
Use a thinner side bear ing adjusting washer.
SPD772
Tool number A: ST15310000 ( — )
B: ST35325000 ( — )
C: ST30621000 ( — )
SPD992
Tool number : ST30022000 ( — )
SPD377
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DLN-266
< DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
REAR FINAL DRIVE
10. 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 drive pinion bearing preload torque using Tool
(B).
CAUTION:
• Do not reuse drive pinion lock nut.
• Apply anti-corrosive oil to the threads of the drive pinionand 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.
• If the drive pinion bearin g preload torque exceeds the
specified value, replace collap sible spacer and tighten it
again to adjust. Do not loosen drive pinion lock nut to
adjust the drive pinion bearing preload torque.
• After adjustment, rotate dri ve pinion back and forth 2 to 3
times to check for unusual noise, rotation malfunction,
and other malfunctions.
11. Check companion flange runout.
12. Install the differential case assembly.
Differential Assembly
1. Install side gear thrust washers with the same thickness as the ones installed prior to disassembly, or reinstall the old ones on
the side gears.
2. Install the side gears and side gear thrust washers into the dif- ferential case.
CAUTION:
Make sure that the circular clip is installed to side gears.
3. Install the pinion mate thrust washers to the two pinion mate gears. Then install the pinion mate gears with the pinion mate
thrust washers by aligning them in diagonally opposite positions
and rotating them into the differential case.Tool number B: ST3127S000 (J-25765-A)
Drive pinion bearing preload torque
: Refer to DLN-270, "
Inspection and Adjustment"
WDIA0379E
SDIA0193J
SDIA2025E
Revision: April 20092010 QX56

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4. Align the lock pin hole on the differential case with the lock pin hole on the pinion mate shaft, and install the pinion mate shaft.
5. Measure the side gear end play. If necessary, select the appro- priate side gear thrust washers. Refer to DLN-270, "
Inspection
and Adjustment".
6. Drive a new lock pin into the pinion mate shaft until it is flush with the differential case using suitable tool.
CAUTION:
Do not reuse lock pin.
7. Align the matching mark of the differential case with the mark of the drive gear, then place the drive gear onto the differential
case.
8. Apply thread locking sealant into the threaded holes of the drive gear and install the bolts.
• Use Genuine Medium Strength Thread Locking Sealant orequivalent. Refer to GI-15, "
Recommended Chemical Prod-
ucts and Sealants".
CAUTION:
Make sure the drive gear back and threaded holes are
clean.
9. Tighten the drive gear bolts to the specified torque. After tighten- ing the drive gear bolts to the specified torque, tighten an addi-
tional 34 ° using Tool.
CAUTION:
• Always use Tool. Avoid tightening based on visual check alone.
• Tighten drive gear bolts in a crisscross pattern.
SDIA0195J
WDIA0131E
SDIA2593E
SDIA2594E
Tool number : KV10112100-A (BT-8653-A)
AWBIA0722ZZ
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DLN-268
< DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
REAR FINAL DRIVE
10. Press the side bearing inner races into the differential case
using Tools.
CAUTION:
Do not reuse side bearing inner race.
11. Install the differential case assembly with the side bearing outer races into the gear carrier.
12. Measure the side bearing preload torque. If necessary, select the appropriate side bearing adjusting washers. Refer to DLN-
270, "Inspection and Adjustment".
13. Insert the selected left and right side bearing adjusting washers in place between the side bearings and gear carrier.
14. Install the side bearing caps with the matching marks aligned and tighten the side bearing cap bolts to the specified torque.
15. Check and adjust the drive gear runout, tooth contact, drive gear to drive pinion backlash, and total pre- load torque.
Recheck the above items.
16. Install the side flanges. Tool number A: KV38100200 (J-26233)
B: ST33081000 ( — )
SPD353
SPD919
SPD924
SPD889
Revision: April 20092010 QX56

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17. Apply a 3.2mm (0.126 in) bead of sealant to the mating surface of the carrier cover.
• 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.
18. Install the carrier cover to the gear carrier. Tighten the bolts to the specified torque. Refer to DLN-249, "
Removal and Installa-
tion".
19. Install the side flange. Refer to DLN-247, "
Removal and Installa-
tion".
Side Flange
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.
WDIA0282E
Tool number : KV38100200 (J-26233)
SPD560
Tool number : KV38107900 (J-39352)
SDIA0822E
Revision: April 20092010 QX56