Infiniti QX56 (Z62). Manual - part 489

DLN-156

< REMOVAL AND INSTALLATION >

[FRONT FINAL DRIVE: R180A]

FRONT OIL SEAL

REMOVAL AND INSTALLATION

FRONT OIL SEAL

Exploded View

INFOID:0000000006222381

Removal and Installation

INFOID:0000000006222382

REMOVAL

CAUTION:

Verify identification stamp of replacement frequency put 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 collapsible spacer replacement is necessary, remove final
drive assembly and disassemble it to replace front oil seal and collapsible spacer. Refer to 

DLN-162,

"Removal and Installation"

 and 

DLN-168, "Disassembly"

.

NOTE:
The reuse of collapsible spacer is prohibited 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 right of stamp

Not required

PDIA1001E

FRONT OIL SEAL

DLN-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 the 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

0

0

“0”
(Front oil seal was replaced once.)

1

01

“01”
(Collapsible spacer and front oil seal were replaced last time.)

0

010

“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

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 evenly 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

FRONT OIL SEAL

DLN-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 tighten 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 bearing and malfunction of pinion bearing. Check for
these items and repair if necessary.

c.

If the runout value is still outside 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