Infiniti M35/M45 Y50. Manual — part 1023
REAR FINAL DRIVE ASSEMBLY
RFD-19
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RFD
ASSEMBLY INSPECTION AND ADJUSTMENT
●
Before inspection and adjustment, drain gear oil.
Total Preload Torque
1.
Secure final drive assembly onto an attachment.
2.
Remove side flanges.
3.
Rotate drive pinion back and forth 2 to 3 times to check for unusual noise and rotation malfunction.
4.
Rotate drive pinion at least 20 times to check for smooth opera-
tion of the bearing.
5.
Measure total preload with the preload gauge.
NOTE:
Total preload torque = Pinion bearing preload torque + Side
bearing preload torque
●
If measured value is out of the specification, disassemble it to
check and adjust each part. Adjust the pinion bearing preload and side bearing preload.
Adjust the pinion bearing preload first, then adjust the side bearing preload.
Drive Gear Runout
1.
Remove rear cover. Refer to
RFD-22, "Differential Assembly"
2.
Fit a dial indicator to the drive gear back face.
3.
Rotate the drive gear to measure runout.
●
If the runout is outside of the repair limit, check drive gear
assembly condition; foreign material may be caught between
drive gear and differential case, or differential case or drive gear
may be deformed, etc.
CAUTION:
Replace drive gear and drive pinion gear as a set.
Tool number
A: KV38100800 (J-25604-01)
Tool number
A: ST3127S000 (J-25765-A)
Total preload torque:
2.84 - 3.75 N·m (0.29 - 0.38 kg-m, 26 - 33 in-lb)
PDIA0766J
When the preload torque is large
On pinion bearings:
Replace the collapsible spacer.
On side bearings:
Use thinner side bearing adjusting washers by the same amount to
each side. Refer to
RFD-38, "Side Bearing Adjusting Washer"
.
When the preload is small
On pinion bearings:
Tighten the drive pinion lock nut.
On side bearings:
Use thicker side bearing adjusting washers by the same amount to
each side. Refer to
RFD-38, "Side Bearing Adjusting Washer"
.
Runout limit:
0.05 mm (0.0020 in)
SPD886
RFD-20
REAR FINAL DRIVE ASSEMBLY
Tooth Contact
1.
Remove rear cover. Refer to
RFD-22, "Differential Assembly"
2.
Apply red lead to drive gear.
CAUTION:
Apply red lead to both the faces of 3 to 4 gears at 4 loca-
tions evenly spaced on drive gear.
3.
Rotate drive gear back and forth several times, check drive pin-
ion gear to drive gear tooth contact.
CAUTION:
Check tooth contact on drive side and reverse side.
SPD357
SDIA0570E
SDIA0207E
REAR FINAL DRIVE ASSEMBLY
RFD-21
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RFD
4.
If tooth contact is improperly adjusted, follow the procedure
below to adjust the pinion height (dimension X).
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If the tooth contact is near the face (face contact), or near the
heel (heel contact), thicken pinion height adjusting washers to
move drive pinion closer to drive gear.
Refer to
RFD-38, "Pinion Height Adjusting Washer"
●
If the tooth contact is near the flank (flank contact), or near the
toe (toe contact), thin pinion height adjusting washers to move
drive pinion farther from drive gear.
Refer to
RFD-38, "Pinion Height Adjusting Washer"
Backlash
1.
Remove rear cover. Refer to
RFD-22, "Differential Assembly"
2.
Fit a dial indicator to the drive gear face to measure the back-
lash.
●
If the backlash is outside of the specified value, change the
thickness of side bearing adjusting washer.
CAUTION:
Do not change the total amount of washers as it will change the bearing preload.
SDIA0517E
PDIA0440E
PDIA0441E
Backlash:
0.10 - 0.15 mm (0.0039 - 0.0059 in)
When the backlash is large:
Make drive gear back side adjusting washer thicker,
and drive gear tooth side adjusting washer thinner by
the same amount. Refer to
When the backlash is small:
Make drive gear back side adjusting washer thinner,
and drive gear tooth side adjusting washer thicker by
the same amount. Refer to
SPD513
RFD-22
REAR FINAL DRIVE ASSEMBLY
Companion Flange Runout
1.
Fit a test indicator to the inner side of companion flange (socket
diameter).
2.
Rotate companion flange to check for runout.
3.
If the runout value is outside the runout limit, follow the proce-
dure 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.
DISASSEMBLY
Differential Assembly
1.
Drain gear oil, if necessary.
2.
Remove side flange.
3.
Remove rear cover mounting bolts.
4.
Remove rear cover to insert the seal cutter between gear carrier
and rear cover.
CAUTION:
●
Be careful not to damage the mating surface.
●
Do not insert flat-bladed screwdriver, this way damage
the mating surface.
5.
Using two 45 mm (1.77 in) spacers, mount carrier on the attach-
ment.
6.
For proper reinstallation, paint matching marks on one side of
the bearing cap.
CAUTION:
●
For matching marks, use paint. Do not damage bearing
caps and gear carrier.
●
Bearing caps are line-board during manufacture. The
matching marks are used to reinstall them in their origi-
nal positions.
Runout limit:
0.08 mm (0.0031 in)
PDIA0490E
Tool number
A: KV10111100 (J-37228)
PDIA0756J
Tool number
A: KV38100800 (J-25604-01)
PDIA0757J
SDIA1795E
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