Infiniti QX56 (Z62). Manual — part 492
DLN-168
< UNIT DISASSEMBLY AND ASSEMBLY >
[FRONT FINAL DRIVE: R180A]
DIFFERENTIAL ASSEMBLY
Disassembly
INFOID:0000000006222392
1.
Remove bushing with drift (commercial service tool).
2.
Remove differential side shaft assembly. Refer to
.
3.
Remove side oil seal (left side) from gear carrier with a suitable tool.
4.
For proper reinstallation, paint matching marks on one side of
the side bearing cap and gear carrier.
CAUTION:
• For matching marks, use paint. Never damage side bear-
ing cap and gear carrier.
• Bearing caps are manufactured as integral molding. Use
the matching marks to them in their original positions.
5.
Remove the side bearing caps.
6.
Lift the differential case assembly out of the gear carrier with
sliding hammer (commercial service tool).
7.
Remove the differential case assembly with the side bearing
outer race and side bearing adjusting washer.
CAUTION:
• Keep side bearing outer races together with side bearing
inner races. Do not mix them up.
• Keep side bearing adjusting washers together with side
bearings.
: Apply Genuine Silicone RTV or equivalent. Refer to
GI-22, "Recommended Chemical Products and Sealants"
.
: Apply Genuine High Strength Thread Locking Sealant or equivalent. Refer to
GI-22, "Recommended Chemical Products
Refer to
for symbols not described above.
SDIA1795E
PDIA0701E
PDIA0547E
SPD919
DIFFERENTIAL ASSEMBLY
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< UNIT DISASSEMBLY AND ASSEMBLY >
[FRONT FINAL DRIVE: R180A]
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8.
Remove housing spacer.
9.
Remove side bearing inner race with the puller (A) and base (B).
CAUTION:
• To prevent damage to the side bearing and drive gear,
place copper plates between these parts and vise.
• It is necessary to remove side bearing inner race except
when it is replaced.
10. For proper reinstallation, paint matching marks on the differential
case and drive gear.
CAUTION:
For matching marks, use paint. Never damage differential
case and drive gear.
11. Remove the drive mounting gear bolts.
12. Tap the drive gear off the differential case using suitable tool.
CAUTION:
Tap evenly all around to keep drive gear from bending.
13. Perform inspection after disassembly. Refer to
Assembly
INFOID:0000000006222393
1.
Apply thread locking sealant into the threaded holes of the drive
gear and install the new drive gear bolts.
• Use Genuine High Strength Thread Locking Sealant or equiv-
alent. Refer to
GI-22, "Recommended Chemical Products and
.
CAUTION:
Clean degrees drive gear back and threaded holes suffi-
ciently.
2.
Install the drive gear to differential case assembly.
CAUTION:
Align the matching marks of differential case assembly and
drive gear
3.
Tighten the drive gear mounting bolts with the following procedure.
CAUTION:
Apply anti-corrosion oil to the thread and seat of mounting bolts.
a.
Tighten the bolts in a crisscross fashion to the specified torque.
b.
Tighten the bolts additionally at the specified angle.
CAUTION:
Check the tightening angle using the angle wrench (A)
[SST: KV10112100 (BT-8653-A)]. Never make judgment by
visual inspection.
A: Puller [SST: ST33051001 (J-22888-20)]
B: Base [SST: ST33061000 (J-8107-2)]
PDIA0827E
PDIA0496E
SDIA2594E
Drive gear mounting
bolts tightening torque
: 58.8 N•m (6.0 kg-m, 43 ft-lb)
Drive gear mounting
bolts tightening angle
: 34 to 39 degree
AWBIA0722ZZ
DLN-170
< UNIT DISASSEMBLY AND ASSEMBLY >
[FRONT FINAL DRIVE: R180A]
DIFFERENTIAL ASSEMBLY
4.
Press side bearing inner races to the differential case with the
drift (A) and the base (B).
CAUTION:
Never reuse side bearing inner races.
5.
Install housing spacer.
6.
Install the differential case assembly with the side bearing outer
races into the gear carrier.
CAUTION:
• Never reuse side bearing outer race when replacing side
bearing inner race (replace as a set).
• Apply differential gear oil to the side bearings.
7.
Insert left and right original side bearing adjusting washers in
place between side bearings and gear carrier.
8.
Install the side bearing caps with the matching marks aligned
and tighten the side bearing cap bolts to the specified torque.
CAUTION:
Align matching marks on bearing cap with that on gear car-
rier.
9.
Install side oil seal (left side) until it becomes flush with the gear
carrier with the drift (A and B).
CAUTION:
• Never reuse side oil seal.
• When installing, never incline oil seal.
• Apply multi-purpose grease onto oil seal lips, and gear oil
onto the circumference of oil seal.
A: Drift [SST: ST33230000 (J-35867)]
B: Base [SST: ST33061000 (J-8107-2)]
SPD353
SPD919
SPD924
SDIA1795E
A: Drift [SST: ST30720000 (J-25405)]
B: Drift [SST: ST27863000 (
—
)]
PDIA0711E
DIFFERENTIAL ASSEMBLY
DLN-171
< UNIT DISASSEMBLY AND ASSEMBLY >
[FRONT FINAL DRIVE: R180A]
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10. Check and adjust drive gear runout, tooth contact, backlash, and total preload torque. Refer to
Recheck above items. Readjust the above description, if necessary.
11. Apply sealant to match surface of carrier cover.
• Use Genuine Silicone RTV or equivalent. Refer to
"Recommended Chemical Products and Sealants"
CAUTION:
Remove any old sealant adhering to the mating surfaces.
Also remove any moisture, oil, or foreign material adhering
to the application and mating surfaces.
12. Install the carrier cover to the gear carrier. Tighten the bolts to
the specified torque.
13. Install side shaft. Refer to
14. Install bushing with drift (commercial service tool).
Adjustment
INFOID:0000000006222394
TOTAL PRELOAD TORQUE
1.
Install the differential side shaft. Refer to
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 total preload torque with the preload gauge [SST:
ST3127S000 (J-25765-A)].
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.
DRIVE GEAR RUNOUT
1.
Remove carrier cover. Refer to
PDIA0712E
Total preload torque
: Refer to
PDIA0697E
When the preload torque is large
On drive pinion bearings:
Decrease the drive pinion bearing adjusting washer and drive
pinion adjusting washer thickness. For selecting adjusting
washer, refer to the latest parts information.
On side bearings:
Increase the side bearing adjusting washer thickness. For se-
lecting adjusting washer, refer to the latest parts information.
When the preload torque is small
On drive pinion bearings:
Increase the drive pinion bearing adjusting washer and drive
pinion adjusting washer thickness. For selecting adjusting
washer, refer to the latest parts information.
On side bearings:
Decrease the side bearing adjusting washer thickness. For se-
lecting adjusting washer, refer to the latest parts information.
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