2011 INFINITI QX56 oil

DLN-176
< UNIT DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: R180A]
DRIVE PINION
DRIVE PINION
Exploded ViewINFOID:0000000006222396
1. Bushing 2. Bearing cap 3. Side bearing
4. Side bearing adjusting washer 5. Drive pinion 6. Pinion height adjusting washer
7. Pinion rear bearing 8. Collapsible spacer 9. Gasket
10. Drain plug 11. Side oil seal (left side) 12. Pinion front bearing
13. Front oil seal 14. Companion flange 15. Drive pinion lock nut
16. Gear carrier 17. Side shaft 18. Side shaft bearing
19. Snap ring 20. Snap ring 21. Side oil seal (right side)
22. Drive gear 23. Differential case assembly 24. Housing spacer
25. Filler plug 26. Carrier cover
A: Oil seal lip B: Screw hole C. Comply with the assembly proce-
dure when tightening. Refer to DLN-
169, "Assembly".
: Apply gear oil. : Apply anti-corrosion oil.
: Apply multi-purpose grease.
JPDID0390GB
Revision: 2010 May2011 QX56

DLN-178
< UNIT DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: R180A]
DRIVE PINION
7. Remove the front oil seal with a suitable tool.
CAUTION:
Never damage gear carrier.
8. Remove the drive pinion front bearing inner race.
9. Remove the collapsible spacer.
10. Remove the drive pinion rear bearing inner race and drive pinion height adjusting washer with the replacer (commercial service
tool).
11. Remove the drive pinion front and rear bearing outer races by tapping them uniformly with a suitable tool.
CAUTION:
Never damage gear carrier.
12. Perform inspection after disassembly. Refer to DLN-184,
"Inspection".
PDIA0716E
S-PD179
PDIA0705E
Revision: 2010 May2011 QX56

DRIVE PINIONDLN-179
< UNIT DISASSEMBLY AND ASSEMBLY > [FRONT FINAL DRIVE: R180A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
AssemblyINFOID:0000000006222398
1. Install drive pinion rear bearing outer race and drive pinion front bearing outer race using Tools.
CAUTION:
 First tap the drive pinion bearing outer race until it
becomes flush with the gear carrier.
 Never reuse drive pinion fron t and rear bearing outer race.
2. Select pinion height adjusting washer. Refer to DLN-181,
"Adjustment".
3. Install selected drive pinion height adjusting washer (2) to drive pinion. Press pinion rear bearing inner race (1) to it, using drift
(A) [SST: ST30901000 (J-26010-01)].
CAUTION:
 Be careful of the direction of pinion height adjusting
washer. (Assemble as shown in the figure.)
 Never reuse pinion rear bearing inner race.
4. Assemble collapsible spacer. CAUTION:
Never reuse collapsible spacer.
5. Assemble drive pinion into gear carrier. CAUTION:
Apply gear oil to pinion rear bearing.
6. Assemble pinion front bearing inner race to drive pinion assem- bly.
CAUTION:
 Never reuse pinion front bearing inner race.
 Apply gear oil to pinion front bearing.
A: Drift bar [SST: ST30611000 (J-25742-1)]
B: Drift [SST: ST30313000 (J-25742-3)]
C: Drift [SST: KV38100200 (J-26233)]
PDIA0707E
PDIA0805J
PDIA0708E
Revision: 2010 May2011 QX56

DLN-180
< UNIT DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: R180A]
DRIVE PINION
7. 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.
8. Install front oil seal as shown in figure with the drifts (A and B). CAUTION:
 Never reuse oil seal.
 When installing, n ever incline oil seal.
 Apply multi-purpose grease onto oil seal lips, and gear oil
onto the circumference of oil seal.
9. 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 th e 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 dri ve pinion back and forth 2 to 3
times to check for unusual no ise, 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
Revision: 2010 May2011 QX56

DLN-184
< UNIT DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: R180A]
DRIVE PINION
1. Fit a dial indicator onto the companion flange face (inner side of
the propeller shaft mounting bolt holes).
2. Rotate companion flange to check for runout.
3. Fit a test indicator to the inner side of companion flange (socket diameter).
4. Rotate companion flange to check for runout.
5. If the runout value is outside the runout li mit, follow the procedure below to adjust.
a. Check for runout while changing the phase between companion flange and drive pinion 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 cause will 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.
InspectionINFOID:0000000006222400
INSPECTION AFTER DISASSEMBLY
Drive Gear and Drive Pinion
 Clean up the disassembled parts.
 If the gear teeth never mesh or line-up correctly, det ermine the cause and adjust or replace as necessary.
 If the gears are worn, cracked, damaged, pitted or ch ipped (by friction) noticeably, replace with new drive
gear and drive pinion as a set.
Bearing
 Clean up the disassembled parts.
 If any chipped (by friction), pitted, worn, rusted or scratched marks, or unusual noise from the bearing is
observed, replace as a bearing assembly (as a new set).
Oil Seal
 Whenever disassembled, replace.
 If wear, deterioration of adherence (sealing force lips) , or damage is detected on the lips, replace them.
Companion Flange
 Clean up the disassembled parts.
 If any chipped mark [about 0.1 mm, (0.004 in)] or other damage on the contact sides of the lips of the com-
panion flange is found, replace. 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

SERVICE DATA AND SPECIFICATIONS (SDS)
DLN-185
< SERVICE DATA AND SPECIFICATIONS (SDS) [FRONT FINAL DRIVE: R180A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
General SpecificationsINFOID:0000000006222401
Drive Gear RunoutINFOID:0000000006222402
Unit: mm (in)
Preload TorqueINFOID:0000000006222403
Unit: N·m (kg-m, in-lb)
BacklashINFOID:0000000006222404
Unit: mm (in)
Companion Flange RunoutINFOID:0000000006222405
Unit: mm (in)
Applied model 4WD
VK56VD A/T
Final drive model R180A
Gear ratio 2.937
Number of teeth (Drive gear/Drive pinion) 47/16
Oil capacity (Approx.) (US pt, lmp pt)0.75 (1-5/8, 1-3/8)
Number of pinion gears 4
Drive pinion adjustment spacer type Collapsible
Item Limit
Drive gear back face runout 0.05 (0.0020)
Item Standard
Pinion bearing (P
1) 1.08 – 1.66 (0.11 – 0.16, 10 – 14)
Side bearing (P
2) 0.59 – 1.08 (0.06 – 0.11, 6 – 9)
Side bearing to pinion bearing (Total preload)
(Total preload = P
1 + P2) 1.67 – 2.74 (0.17 – 0.27, 15 – 24)
Item Standard
Drive gear to drive pinion gear 0.10 – 0.15 (0.0039 – 0.0059)
Item Limit
Companion flange face 0.10 (0.004)
Inner side of the companion flange 0.10 (0.004)
Revision: 2010 May2011 QX56

DLN-186
< PRECAUTION >[REAR FINAL DRIVE: R230]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Service Notice or Precautions for Rear Final DriveINFOID:0000000006222406
 Check for the correct installation status prior to removal or disassembly. If matching marks are required, be
certain they never interfere with the function of the parts when applied.
 Overhaul should be done in a clean work area, it is preferable to work in dustproof area.
 Before disassembly, using steam or white gasoline, completely remove sand and mud from the exterior of
the unit, preventing them from entering into the unit during disassembly or assembly.
 Check appearance of the disassembled parts for dam age, deformation, and unusual wear. Replace them
with new ones, if necessary.
 Gaskets, seals and O-rings should be replaced any time when the unit is disassembled.
 In principle, tighten bolts or nuts gradually in several steps working diagonally from inside to outside. If tight-
ening sequence is specified, observe it.
 Clean and flush the parts sufficiently and blow-dry them.
 Be careful not to damage sliding surfaces and mating surfaces.
 When applying sealant, remove the old sealant from t he mounting surface; then remove any moisture, oil,
and foreign materials from the application and mounting surfaces.
 Always use shop paper for cleaning the inside of components.
 Never use cotton gloves or shop rags to prevent entering of lint.
 During assembly, observe the specified tightening tor que, and apply new gear oil, petroleum jelly, or multi-
purpose grease as specified for each vehicle, if necessary.
Revision: 2010 May2011 QX56

PREPARATIONDLN-187
< PREPARATION > [REAR FINAL DRIVE: R230]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
PREPARATION
PREPARATION
Special Service ToolINFOID:0000000006222407
The actual shapes of Kent-Moore t ools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name Description
KV40104100
(—)
Attachment Removing side flange
ST36230000
(J-25840-A)
Sliding hammer Removing side flange
ST3127S000
(J-25765-A)
Preload gauge Measuring pinion bearing preload and total
preload
KV381054S0
(J-34286)
Puller Removing front oil seal
ST15310000
(J-25640-B)
Drift
a: 96 mm (3.78 in) dia.
b: 84 mm (3.31 in) dia. Installing front oil seal
KV38108000
(—)
Protector Installing side flange
ZZA0804D
ZZA0803D
ZZA0806D
ZZA0601D
S-NT673
S-NT129
Revision: 2010 May2011 QX56