Infiniti QX56 (Z62). Manual — part 496
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 limit, 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.
Inspection
INFOID:0000000006222400
INSPECTION AFTER DISASSEMBLY
Drive Gear and Drive Pinion
• Clean up the disassembled parts.
• If the gear teeth never mesh or line-up correctly, determine the cause and adjust or replace as necessary.
• If the gears are worn, cracked, damaged, pitted or chipped (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
.
Companion flange runout
: Refer to
.
JSDIA0116ZZ
SERVICE DATA AND SPECIFICATIONS (SDS)
DLN-185
< SERVICE DATA AND SPECIFICATIONS (SDS)
[FRONT FINAL DRIVE: R180A]
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
General Specifications
INFOID:0000000006222401
Drive Gear Runout
INFOID:0000000006222402
Unit: mm (in)
Preload Torque
INFOID:0000000006222403
Unit: N·m (kg-m, in-lb)
Backlash
INFOID:0000000006222404
Unit: mm (in)
Companion Flange Runout
INFOID: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
+ P
2
)
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)
DLN-186
< PRECAUTION >
[REAR FINAL DRIVE: R230]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Service Notice or Precautions for Rear Final Drive
INFOID: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 damage, 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 the 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 torque, and apply new gear oil, petroleum jelly, or multi-
purpose grease as specified for each vehicle, if necessary.
PREPARATION
DLN-187
< PREPARATION >
[REAR FINAL DRIVE: R230]
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PREPARATION
PREPARATION
Special Service Tool
INFOID:0000000006222407
The actual shapes of Kent-Moore tools 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
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