Infiniti QX56 (Z62). Manual - part 495

DLN-180

< UNIT DISASSEMBLY AND ASSEMBLY >

[FRONT FINAL DRIVE: R180A]

DRIVE PINION

Using drift [SST: ST33200000 (J-26082)], press the pinion front
bearing inner race to drive pinion as far as drive pinion nut can
be tightened.

Install front oil seal as shown in figure with the drifts (A and B).

CAUTION:

• Never reuse 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.

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).

10. Temporarily tighten drive pinion lock nut to drive pinion.

CAUTION:

• Apply anti-corrosion oil to the thread and seat of the drive

pinion lock nut

• Never reuse drive pinion lock nut.

11. Tighten to drive pinion lock nut using flange wrench (A), while

adjusting pinion bearing preload torque using preload gauge (B).

CAUTION:

• Adjust to the lower limit of the drive pinion lock nut tight-

ening torque first.

• After adjustment, rotate drive pinion back and forth 2 to 3

times to check for unusual noise, rotation malfunction,
and other malfunctions.

12. Install differential case assembly. Refer to

DLN-169, "Assem-

bly"

CAUTION:

PDIA0709E

A: Drift [SST: ST30720000 (J-25405)]

B: Drift [SST: ST27863000 (

—

)]

PDIA0717E

PDIA0799J

A: Flange wrench (commercial service tool)

B: Preload gauge [SST: ST3127S000 (J-25765-A)]

Pinion bearing preload

: Refer to

DLN-185, "Pre-

load Torque"

WDIA0382E

DRIVE PINION

DLN-181

< UNIT DISASSEMBLY AND ASSEMBLY >

[FRONT FINAL DRIVE: R180A]

DLN

Never install carrier cover yet.

13. Check and adjust drive gear runout, tooth contact, drive gear to drive pinion backlash. Refer to

DLN-171,

"Adjustment"

14. Install side shaft. Refer to

DLN-166, "Assembly"

15. Check and adjust companion flange runout. Refer to

DLN-181, "Adjustment"

16. Check total preload torque. Refer to

DLN-171, "Adjustment"

17. Install carrier cover. Refer to

DLN-169, "Assembly"

Adjustment

INFOID:0000000006222399

PINION GEAR HEIGHT

Make sure all parts are clean and that the bearings are well
lubricated.

Assemble the pinion gear bearings into the differential shim
selector tool [SST:

—

(J-34309)].

• Pinion front bearing; make sure the J-34309-3 pinion front

bearing seat is secured tightly against the J-34309-2 gauge
anvil. Then turn the pinion front bearing pilot, J-34309-7, to
secure the bearing in its proper position.

• Pinion rear bearing; the pinion rear bearing pilot, J-34309-8,

is used to center the pinion rear bearing only. The pinion rear
bearing locking seat, J-34309-4, is used to lock the bearing to
the assembly.

• Installation of J-34309-9 and J-34309-16; place a suitable

2.5 mm (0.098 in) thick plain washer between J-34309-9 and
J-34309-16. Both surfaces of J-34309-9 and J-34309-16 must
be parallel with a clearance of 2.5 mm (0.098 in).

Install the pinion rear bearing inner race into gear carrier. Then
place the pinion preload shim selector tool, J-34309-1, gauge
screw assembly.

Assemble the pinion front bearing inner race and the J-34309-2
gauge anvil. Assemble them together with the J-34309-1 gauge
screw in gear carrier. Make sure that the pinion height gauge
plate, J-34309-16, turns a full 360 degrees. Tighten the two sec-
tions together by hand.

SPD769

SPD197A

SPD893

SPD199A

DLN-182

< UNIT DISASSEMBLY AND ASSEMBLY >

[FRONT FINAL DRIVE: R180A]

DRIVE PINION

Turn the assembly several times to seat the bearings.

Measure the turning torque at the end of the J-34309-2 gauge
anvil using preload gauge [SST: ST3127S000 (J-25765-A)].

Place the J-34309-10 “R180A” pinion height adapter onto the
gauge plate and tighten it by hand.

CAUTION:

Make sure all machined surfaces are clean.

Position the side bearing discs, J-25269-18, and arbor firmly into
the side bearing bores. Install the bearing caps and tighten bear-
ing cap mounting bolts to the specified torque. Refer to

DLN-

176, "Exploded View"

Select the correct standard pinion height adjusting washer thick-
ness. Select by using a standard gauge of 3 mm (0.12 in) and J-
34309-101 feeler gauge. Measure the distance between the J-
34309-11 pinion height adapter including the standard gauge
and the arbor.

SPD770

Turning torque specifica-
tion

: 1.08 – 1.66 N·m (0.11 –
0.16 kg-m, 10 – 14 in-lb)

PDIA0566E

SPD208A

SPD211A

SPD204A

DRIVE PINION

DLN-183

< UNIT DISASSEMBLY AND ASSEMBLY >

[FRONT FINAL DRIVE: R180A]

DLN

10. Write down exact measurement (the value of feeler gauge).

11. Correct the pinion height washer size by referring to the “pinion

head number”.
There are two numbers painted on the drive pinion. The first
one refers to the drive pinion and drive gear as a matched
set. This number should be the same as the number on the
drive gear. The second number is the “pinion head height
number”. It refers to the ideal pinion height from standard
for quietest operation. Use the following chart to determine
the correct pinion height washer.

12. Select the correct pinion height adjusting washer. For selecting adjusting washer, refer to the latest parts

information.

13. Remove the J-34309 differential shim selector tool from the final

drive housing. Then disassemble to retrieve the pinion bearings.

COMPANION FLANGE RUNOUT

SPD775

Pinion head height number

Add or remove from the standard pinion height ad-

justing washer thickness measurement

−

+1
+2
+3
+4
+5
+6

Add 0.06 mm (0.0024 in)
Add 0.05 mm (0.0020 in)
Add 0.04 mm (0.0016 in)
Add 0.03 mm (0.0012 in)
Add 0.02 mm (0.0008 in)
Add 0.01 mm (0.0004 in)

Use the selected washer thickness

Subtract 0.01 mm (0.0004 in)
Subtract 0.02 mm (0.0008 in)
Subtract 0.03 mm (0.0012 in)
Subtract 0.04 mm (0.0016 in)
Subtract 0.05 mm (0.0020 in)
Subtract 0.06 mm (0.0024 in)

SPD542

SPD205A

Content .. 493 494 495 496 ..