2011 INFINITI QX56 oil

DLN-156
< REMOVAL AND INSTALLATION >[FRONT FINAL DRIVE: R180A]
FRONT OIL SEAL
REMOVAL AND INSTALLATION
FRONT OIL SEAL
Exploded ViewINFOID:0000000006222381
Removal and InstallationINFOID:0000000006222382
REMOVAL
CAUTION:
Verify identification stamp of replacement frequency pu
t in the lower part of gear carrier to determine
replacement for collapsible spacer when replacing front oil seal. Refer to “Identification stamp of
replacement frequency of front oil seal”. If coll apsible spacer replacement is necessary, remove final
drive assembly and disassemble it to replace fron t oil seal and collapsible spacer. Refer to DLN-162,
"Removal and Installation" and DLN-168, "Disassembly".
NOTE:
The reuse of collapsible spacer is pr ohibited in principle. However, it is reusable on a one-time basis
only in cases when replacing front oil seal.
Identification Stamp of Replacement Frequency of Front Oil Seal
 The diagonally shaded area in the figure shows stamping point for
replacement frequency of front oil seal.
 The following table shows if collapsible spacer replacement is
needed before replacing front oil seal.
When collapsible spacer replacement is required, disassemble
final drive assembly to replace collapsible spacer and front oil seal.
Refer to DLN-168, "
Disassembly".
1. Front final drive assembly 2. Front oil seal 3. Companion flange
4. Drive pinon lock nut
A. Oil seal lip
: Apply multi-purpose grease.: Apply anti-corrosion oil.
Refer to GI-4, "
Components" for symbols not described on the above.
JPDID0386GB
Stamp collapsible spacer replacement
No stamp Not required
“0” or “0” on the far right of stamp Required
“01” or “1” on the far ri ght of stamp Not required
PDIA1001E
Revision: 2010 May2011 QX56

FRONT OIL SEALDLN-157
< REMOVAL AND INSTALLATION > [FRONT FINAL DRIVE: R180A]
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CAUTION:
Make a stamping after replacing front oil seal.
 After replacing front oil seal, make a stamping on t he stamping point in accordance with the table below in
order to identify replacement frequency.
CAUTION:
Make a stamping from left to right.
1. Make a judgement if a collapsible spacer replace is required.
2. Drain gear oil. Refer to DLN-155, "
Draining".
3. Remove the drive shafts from the front final drive assembly. Refer to FAX-22, "
Removal and Installation".
4. Remove the front propeller shaft from the front final drive assembly. Refer to DLN-129, "
Removal and
Installation".
5. Measure the total preload torque using preload gauge (A) [SST: ST3127S000 (J-25765-A)].
NOTE:
Record the total preload torque measurement.
6. Put matching mark (B) on the end of drive pinion. The matching mark should be in line with the matching mark (A) on companion
flange (1).
CAUTION:
For matching, marks use paint. Never damage companion
flange and drive pinion.
7. Remove the drive pinion lock nut using flange wrench (commer- cial service tool).
Stamp before stamping Stamping on the far right Stamping
No stamp 00
“0”
(Front oil seal was replaced once.) 101
“01”
(Collapsible spacer and front oil seal were replaced last time.) 0010
“0” is on the far right.
(Only front oil seal was replaced last time.) 1...01
“1” is on the far right.
(Collapsible spacer and front oil seal were replaced last time.) 0 ...010
PDIA1002E
PDIA0799J
PDIA1004E
Revision: 2010 May2011 QX56

DLN-158
< REMOVAL AND INSTALLATION >[FRONT FINAL DRIVE: R180A]
FRONT OIL SEAL
8. Remove the companion flange using puller (commercial service
tool).
9. Remove front oil seal using the puller [SST: KV381054S0 (J- 34286)].
INSTALLATION
1. Drive the front oil seal in evenl y until it becomes flush with the
gear carrier using drifts (A and B).
CAUTION:
 Never reuse oil seal.
 Never incline oil seal when installing.
 Apply multi-purpose grease to the lips and differential
gear oil to the circumference of oil seal.
2. Install companion flange (1). NOTE:
When reusing drive pinion, align the matching mark (B) of drive
pinion with the matching mark (A) of companion flange, and then
install companion flange (1).
LDIA0171E
LDIA0172E
A: Drift [SST: ST30720000 (J-25405)]
B: Drift [SST: ST27863000 ( — )]
WDIA0147E
PDIA0799J
Revision: 2010 May2011 QX56

FRONT OIL SEALDLN-159
< REMOVAL AND INSTALLATION > [FRONT FINAL DRIVE: R180A]
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3. Apply anti-corrosion oil to the thread and seat of new drive pin- ion lock nut, and temporarily tighten drive pinion lock nut to drive
pinion, using flange wrench (commercial service tool).
CAUTION:
Never reuse drive pinion lock nut.
4. Tighten drive pinion lock nut within the limits of specified torque so as to keep the pinion bearing preload within a standard val-
ues, using preload gauge (A) [SST: ST3127S000 (J-25765-A)].
CAUTION:
 Adjust to the lower limit of the drive pinion lock nut tight-
ening torque first.
 If the preload torque exceeds the specified value, replace collapsible spacer and tighte n it again to adjust. Never
loosen drive pinion lock nut to adjust the preload torque.
5. Fit a dial indicator onto the companion flange face (inner side of the propeller shaft mounting bolt holes).
6. Rotate the companion flange to check for runout.
7. Fit a test indicator to the inner side of the companion flange (socket diameter).
8. Rotate the companion flange to check for runout.
9. If the runout value is outside the repair limit, follow the procedure below to adjust.
a. Check for runout while changing the phase between companion flange and drive pinion gear by 90 ° step,
and search for the position where the runout is the minimum.
b. If the runout value is still outside of the limit after the phase has been changed, possible causes are be an
assembly malfunction of drive pinion and pinion bear ing and malfunction of pinion bearing. Check for
these items and repair if necessary.
c. If the runout value is still outsi de of the limit after the check and repair, replace companion flange.
10. Install front propeller shaft. Refer to DLN-129, "
Removal and Installation".
11. Install drive shaft. Refer to FAX-22, "
Removal and Installation".
12. Refill gear oil to the final drive and check oil level. Refer to DLN-155, "
Refilling".
13. Check the final drive for oil leakage. Refer to DLN-155, "
Inspection".
Total preload torque: A value
that add 0.1 – 0.4 N·m
(0.01 – 0.04 kg-m, 1 – 3 in-lb) to
the measured value when re-
moving.
PDIA1003E
Companion flange runout : Refer to DLN-185, "Com-
panion Flange Runout".
Companion flange runout : Refer to DLN-185, "
Com-
panion Flange Runout".
JSDIA0116ZZ
Revision: 2010 May2011 QX56

DLN-160
< REMOVAL AND INSTALLATION >[FRONT FINAL DRIVE: R180A]
SIDE OIL SEAL
SIDE OIL SEAL
Exploded ViewINFOID:0000000006222383
Removal and InstallationINFOID:0000000006222384
REMOVAL
1. Drain gear oil. Refer to
DLN-155, "Draining".
2. Remove the drive shafts from the front final drive assembly. Refer to FAX-22, "
Removal and Installation".
3. Remove the side oil seal using suitable tool. CAUTION:
Never damage gear carrier.
INSTALLATION
1. Drive the new side oil seal in evenly until it becomes flush withthe gear carrier using drifts (A and B).
CAUTION:
 Never reuse side oil seal.
 Never incline the new side oil seal when installing.
 Apply multi-purpose grease to the lips and differential gear oil to the circumference of the new side oil seal.
1. Front final drive assembly 2. Side oil seal
A. Oil seal lip
: Apply gear oil.: Apply multi-purpose grease.
Refer to GI-4, "
Components" for symbols not described on the above.
JPDID0387ZZ
LDIA0173E
A: Drift [SST: ST30720000 (J-25405)]
B: Drift [SST: ST27863000 ( — )]
PDIA0826E
Revision: 2010 May2011 QX56

SIDE OIL SEALDLN-161
< REMOVAL AND INSTALLATION > [FRONT FINAL DRIVE: R180A]
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2. Install drive shaft. Refer to FAX-22, "Removal and Installation".
3. Refill gear oil to the final drive and check oil level. Refer to DLN-155, "
Refilling".
4. Check the final drive for oil leakage. Refer to DLN-155, "
Inspection".
Revision: 2010 May2011 QX56

DLN-162
< UNIT REMOVAL AND INSTALLATION >[FRONT FINAL DRIVE: R180A]
FRONT FINAL DRIVE ASSEMBLY
UNIT REMOVAL AND INSTALLATION
FRONT FINAL DRIVE ASSEMBLY
Exploded ViewINFOID:0000000006222385
Removal and InstallationINFOID:0000000006222386
REMOVAL
1. Drain the differential gear oil. Refer to
DLN-155, "Draining".
2. Remove the drive shafts. Refer to FAX-22, "
Removal and Installation".
3. Remove the front propeller shaft from the front final drive assembly. Refer to DLN-129, "
Removal and
Installation".
4. Disconnect the breather hose from the front final drive assembly.
5. Support the front final drive assembly using a suitable jack.
6. Remove the front final drive assembly bolts, then remo ve the front final drive assembly with a power tool.
CAUTION:
Secure the front final drive assembly to a suitable jack while removing it.
INSTALLATION
Note the following, and installation is in the reverse order of removal.
CAUTION:
Check that there are no pinched or restricted areas on the breather hose caused by bending or wind-
ing when installing it.
1. Front final drive assembly
Refer to GI-4, "
Components" for symbols in figure.
JPDID0388GB
Revision: 2010 May2011 QX56

FRONT FINAL DRIVE ASSEMBLYDLN-163
< UNIT REMOVAL AND INSTALLATION > [FRONT FINAL DRIVE: R180A]
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 Install the breather hose (1) as shown in the figure.
- Install the breather hose (1) of final side with the paint mark (A) facing vehicle front, and insert the breather hose until dimension
(B) shown as follows.
CAUTION:
 Never reuse hose clamp.
 Install the hose clamp with th e tab facing vehicle front.
- Be sure to fix the breather hose in (C) position.
 If remove the bracket (2), align stopper part (D) to part (E) of sus-
pension mounting bracket (3), and tighten the mounting bolt (4) to
specified torque.
 When oil leaks while removing final drive assembly, check oil level after the installation. Refer to DLN-142, "
Inspection".
: Vehicle front
B: 20 mm (0.79 in)
Specified torque: 8.3 Nm (0.85 kg-m, 73 in-lb)
JPDID0389ZZ
Revision: 2010 May2011 QX56