Nissan Pathfinder (2012 year). Manual — part 228

FRONT OIL SEAL

DLN-389

< REMOVAL AND INSTALLATION >

[FRONT FINAL DRIVE: M205]

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INSTALLATION

1. Apply multi-purpose grease to the lips of the new front oil seal.

Then drive the new front oil seal in evenly to the gear carrier

using Tool.

CAUTION:

• Do not reuse front oil seal.

• Do not incline the new front oil seal when installing.

• Apply multi-purpose grease to the lips of the new front oil

seal.

2. Install the companion flange to the drive pinion while aligning the matching marks.
3. Apply anti-corrosive oil to the threads of the drive pinion and the

seating surface of the new drive pinion lock nut. Then adjust the

drive pinion lock nut tightening torque using suitable tool (A),

and check the total preload torque using Tool (B).

• The total preload torque should be within the total preload

torque specification. When not replacing the collapsible

spacer, it should also be equal to the measurement taken dur-

ing removal plus an additional 0.56 N·m (0.06 Kg-m, 5 in-lb).

• If the total preload torque is low, tighten the drive pinion lock

nut in 6.8 N·m (0.69 Kg-m, 5ft-lb) increments until the total pre-

load torque is met.

CAUTION:

• Do not reuse drive pinion lock nut.

• Apply anti-corrosive oil to the threads of the drive pinion

and the seating surface of the new drive pinion lock nut.

• Adjust the drive pinion lock nut tightening torque to the

lower limit first. Do not exceed the drive pinion lock nut

specified torque. Refer to

DLN-394, "Disassembly and

Assembly"

.

• Do not loosen drive pinion lock nut to adjust the total preload torque. If the drive pinion lock nut

torque or the total preload torque exceeds the specifications, replace the collapsible spacer and

tighten it again to adjust. Refer to

DLN-394, "Disassembly and Assembly"

.

• After adjustment, rotate drive pinion back and forth 2 to 3 times to check for unusual noise, rota-

tion malfunction, and other malfunctions.

4. Installation of the remaining components is in the reverse order of removal.

CAUTION:

Check the differential gear oil level after installation. Refer to

DLN-386

.

Tool number

: KV38100500 (J-25273)

BDIA0003E

Tool number

(B): ST3127S000 (J-25765-A)

Total preload torque: Refer to

DLN-394, "Disassem-

bly and Assembly"

.

WDIA0381E

August 2012

2012 Pathfinder

DLN-390

< REMOVAL AND INSTALLATION >

[FRONT FINAL DRIVE: M205]

CARRIER COVER

CARRIER COVER

Removal and Installation

INFOID:0000000007357631

REMOVAL

1. Drain differential gear oil. Refer to

DLN-386, "Changing Differential Gear Oil"

.

2. Remove the front final drive assembly. Refer to

DLN-391, "Removal and Installation"

.

3. Remove the carrier cover bolts and separate the carrier cover

from the gear carrier using Tool.

CAUTION:

• Do not damage the mating surface.

• Do not insert flat-bladed screwdriver, this will damage the

mating surface.

INSTALLATION

1. Apply 3 mm (0.12 in) bead of sealant to the mating surface of

the carrier cover as shown.

• Use Genuine Silicone RTV or equivalent. Refer to

GI-14,

"Recommended Chemical Products and Sealants"

.

CAUTION:

Remove any old sealant adhering to the mating surfaces.

Also remove any moisture, oil, or foreign material adhering

to the application and mating surfaces.

2. Install the carrier cover to the gear carrier. Tighten the bolts to

the specified torque. Refer to

DLN-394, "Disassembly and

Assembly"

.

3. Install the front final drive assembly. Refer to

DLN-391,

"Removal and Installation"

.

CAUTION:

Fill the front final drive assembly with recommended differential gear oil. Refer to

DLN-386

.

Tool number

: KV10111100 (J-37228)

PDIA0699E

SDIA3204E

August 2012

2012 Pathfinder

FRONT FINAL DRIVE

DLN-391

< UNIT REMOVAL AND INSTALLATION >

[FRONT FINAL DRIVE: M205]

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UNIT REMOVAL AND INSTALLATION

FRONT FINAL DRIVE

Removal and Installation

INFOID:0000000007357632

REMOVAL

1. Remove the drive shafts from the front final drive assembly. Refer to

FAX-7, "VQ40DE : Removal and

Installation"

.

2. Remove the front cross member.
3. Remove the front propeller shaft from the front final drive assembly. Refer to

DLN-319, "Removal and

Installation"

.

4. Disconnect the vent hose from the front final drive assembly.
5. Support the front final drive assembly using a suitable jack.

1.

Front final drive assembly

2.

Front crossmember

Front

AWDIA0019GB

August 2012

2012 Pathfinder

DLN-392

< UNIT REMOVAL AND INSTALLATION >

[FRONT FINAL DRIVE: M205]

FRONT FINAL DRIVE

6. Remove the front final drive assembly bolts, then remove the

front final drive assembly.

WARNING:

Support the front final drive assembly while removing using

a suitable jack.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

• Make sure there are no pinched or restricted areas on the breather hose caused by folding or bend-

ing when installing it.

• Check the front final drive assembly differential gear oil after installation and refill as necessary.

Refer to

DLN-386

.

BDIA0008E

August 2012

2012 Pathfinder

FRONT FINAL DRIVE

DLN-393

< UNIT DISASSEMBLY AND ASSEMBLY >

[FRONT FINAL DRIVE: M205]

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UNIT DISASSEMBLY AND ASSEMBLY

FRONT FINAL DRIVE

Exploded View

INFOID:0000000007357633

1.

Side bearing adjuster

2.

Side bearing

3.

Side gear thrust washer

4.

Side gear

5.

Lock pin

6.

Pinion mate thrust washer

7.

Pinion mate gear

8.

Pinion mate shaft

9.

Drive pinion

10. Drive pinion height adjusting

washer

11. Drive pinion rear bearing

12. Collapsible spacer

13. Breather tube

14. Differential side flange

15. Dust shield

16. Circular clip

17. Side oil seal

18. Drive pinion front bearing

19. Front oil seal

20. Companion flange

21. Drive pinion lock nut

22. Drain plug

23. Differential side shaft

24. Differential side shaft bearing

25. Extension tube

26. O-ring

27. Gear carrier

28. Plate

29. Differential case

30. Drive gear

AWDIA0020GB

August 2012

2012 Pathfinder

DLN-394

< UNIT DISASSEMBLY AND ASSEMBLY >

[FRONT FINAL DRIVE: M205]

FRONT FINAL DRIVE

Disassembly and Assembly

INFOID:0000000007357634

ASSEMBLY INSPECTION AND ADJUSTMENT

• Drain the differential gear oil before inspection and adjustment. Refer to

DLN-386

.

• Remove and install the carrier cover as necessary for inspection and adjustment. Refer to

DLN-390

.

Total Preload Torque

1. Install the differential side shaft and differential side flange if necessary.

CAUTION:

The differential side shaft and differential side flange must be installed in order to measure total

preload torque.

2. Rotate the drive pinion back and forth 2 to 3 times to check for unusual noise and rotation malfunction.
3. Rotate the drive pinion at least 20 times to check for smooth operation of the bearings.
4. Measure total preload torque using Tool.

NOTE:

Total preload torque = Drive pinion bearing preload torque +

Side bearing preload torque

• If the measured value is out of the specification, check and adjust each part. Adjust the drive pinion

bearing preload torque first, then adjust the side bearing preload torque.

Drive Gear Runout

1. Fit a dial indicator to the drive gear back face.
2. Rotate the drive gear to measure runout.

• If the runout is outside of the limit, check the condition of the drive

gear assembly. Foreign material may be caught between the drive

gear and differential case, or the differential case or drive gear may

be deformed.

CAUTION:

Replace drive gear and drive pinion as a set.

Tooth Contact

31. Side bearing cap

32. Filler plug

33. Carrier cover

34. Bushing

35. Bearing

36

Screw

37

Dowel pin

Tool number

: ST3127S000 (J-25765-A)

Total preload torque: Refer to

DLN-410, "Inspection

and Adjustment"

PDIA0697E

If the total preload torque is greater than specification

On drive pinion bearings: Replace the collapsible spacer.
On side bearings:

Loosen the side bearing adjuster by the same amount on each
side.

If the total preload torque is less than specification

On drive pinion bearings: Tighten the drive pinion lock nut.
On side bearings:

Tighten the side bearing adjuster by the same amount on each
side.

Runout limit:

Refer to

DLN-410, "Inspection and

Adjustment"

SPD886

August 2012

2012 Pathfinder

FRONT FINAL DRIVE

DLN-395

< UNIT DISASSEMBLY AND ASSEMBLY >

[FRONT FINAL DRIVE: M205]

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1. Apply red lead to the drive gear.

NOTE:

Apply red lead to both faces of three to four gears, at four loca-

tions evenly spaced on the drive gear.

2. Rotate the drive gear back and forth several times. Then check

for correct drive pinion to drive gear tooth contact as shown.

CAUTION:

Check tooth contact on drive side and reverse side.

3. If the tooth contact is improperly adjusted, follow the procedure

below to adjust the drive pinion height (dimension X).

• If the tooth contact is near the face (face contact), or near the heel

(heel contact), use a thicker drive pinion height adjusting washer to

move drive pinion closer to the drive gear.

Refer to

DLN-410, "Inspection and Adjustment"

.

• If the tooth contact is near the flank (flank contact), or near the toe

(toe contact), use a thinner drive pinion height adjusting washer to

move the drive pinion farther from the drive gear.

Refer to

DLN-410, "Inspection and Adjustment"

.

SPD357

SDIA0570E

SDIA0517E

PDIA0440E

PDIA0441E

August 2012

2012 Pathfinder

DLN-396

< UNIT DISASSEMBLY AND ASSEMBLY >

[FRONT FINAL DRIVE: M205]

FRONT FINAL DRIVE

Backlash

1. Fit a dial indicator to the drive gear face to measure the back-

lash.

• If the backlash is outside of the specification, adjust each side

bearing adjuster.

CAUTION:

Do not change the side bearing adjusters by different

amounts as it will change the side bearing preload torque.

Companion Flange Runout

1. Rotate companion flange and check for runout on the compan-

ion flange face (inner side of the bolt holes) and companion

flange inner side (socket diameter) using suitable tool.

2. If the runout is outside the runout limit, follow the procedure

below to adjust.

a. Rotate the companion flange on the drive pinion by 90

°

, 180

°

and 270

°

while checking for the position

where the runout is minimum.

b. If the runout is still outside of the runout limit after the companion flange has been rotated on the drive pin-

ion, possible cause could be an assembly malfunction of drive pinion and drive pinion bearing or a mal-

functioning drive pinion bearing.

c.

If the runout is still outside of the runout limit after repair of the assembly of drive pinion and drive pinion

bearing or drive pinion bearing, replace the companion flange.

DISASSEMBLY

Differential Assembly

1. Drain the differential gear oil if necessary.

Backlash:

Refer to

DLN-410, "Inspection and

Adjustment"

SPD513

If the backlash is greater than specification:

Loosen side bearing adjuster A and tighten side bear-
ing adjuster B by the same amount.

If the backlash is less than specification:

Loosen side bearing adjuster B and tighten side bear-
ing adjuster A by the same amount.

SDIA2262E

Runout limit
Companion
flange face:

Refer to

DLN-410, "Inspection

and Adjustment"

Companion
flange inner side:

Refer to

DLN-410, "Inspection

and Adjustment"

SDIA2078E

August 2012

2012 Pathfinder