Nissan Murano: Unit Disassembly and Assembly / Drive Pinion

Exploded View

	Stud bolt		Connector bracket		Reamer bolt
	Electric controlled coupling assembly		Wave spring		Drive pinion oil seal
	Drive pinion lock nut		Pinion front bearing		Gear carrier
	Collapsible spacer		Drive pinion adjusting shim		Pinion rear bearing
	Drive pinion		Drive gear		Differential case
	Side bearing		Side bearing adjusting shim		Side oil seal
	Rear cover		Stud bolt		Gasket
	Drain plug		Filler plug		Pinion mate thrust washer
	Pinion mate gear		Side gear thrust washer		Side gear
	Pinion mate shaft		Lock pin
	Oil seal lip		Screw hole
: N·m (kg-m, in-lb)
: N·m (kg-m, ft-lb)
: Always replace after every disassembly.
: Select with proper thickness.
: Apply gear oil.
*: Apply anti-corrosion oil.
: Apply multi purpose grease.
: Apply Genuine Silicone RTV or equivalent. Refer to Recommended Chemical Products and Sealants.
: Apply Genuine High Strength Thread Locking Sealant or equivalent. Refer to Recommended Chemical Products and Sealants.

Disassembly and Assembly

DISASSEMBLY

Remove electric controlled coupling assembly. Refer to Disassembly and Assembly.

Remove differential assembly. Refer to Disassembly and Assembly.

Remove drive pinion oil seal, using oil seal remover (commercial service tool).

Fit drive pinion socket (A) onto drive pinion spline. Remove drive pinion lock nut, using the pinion nut wrench (B).

A	: Drive pinion socket [SST: KV38109500 ( — )]
B	: Pinion nut wrench [SST: KV38109400 ( — )]

Press drive pinion assembly out of gear carrier.

CAUTION:

Do not drop drive pinion assembly.

Remove pinion front bearing inner race.

Remove collapsible spacer.

Remove pinion rear bearing inner race from drive pinion, using the separator (A) and the puller (B).

A	: Separator (commercial service tool)
B	: Puller (commercial service tool)

Using a brass rod or equivalent (A), tap pinion front bearing outer race evenly from the 2 cutouts on gear carrier and remove pinion front bearing outer race.

CAUTION:

Be careful not to damage gear carrier.

Using a brass rod or equivalent (A), tap drive pinion adjusting shim evenly from the 2 cutouts on gear carrier and remove drive pinion adjusting shim and pinion rear bearing outer race.

CAUTION:

Be careful not to damage gear carrier.

Perform inspection after disassembly. Refer to Inspection.

ASSEMBLY

Install a drive pinion adjusting shim of the same thickness as was installed prior to disassembly. Press pinion rear bearing outer race into gear carrier, using the drift (A) [SST: ST33200000 (J-26082)].

CAUTION:

• At first, using a hammer, tap bearing outer race until it becomes flush to gear carrier.

• Do not reuse pinion rear bearing outer race.

Press pinion front bearing outer race into gear carrier, using the drift (A) [SST: ST33230000 (J-25805-01)].

CAUTION:

• At first, using a hammer, tap bearing outer race until it becomes flush to gear carrier.

• Do not reuse pinion front bearing outer race.

Press pinion rear bearing inner race to drive pinion, using the drift (A) [SST: ST23860000 ( — )].

CAUTION:

Do not reuse pinion rear bearing inner race.

Check and adjust the tooth contact and back lash of drive gear and drive pinion following the procedure below.Assemble drive pinion into gear carrier.

CAUTION:

• Do not assemble collapsible spacer.

• Apply gear oil to pinion rear bearing.

Assemble pinion front bearing inner race to drive pinion assembly.

CAUTION:

• Do not reuse pinion front bearing inner race.

• Apply gear oil to pinion front bearing.

Using the drifts (A and C) and press stand (B), press pinion front bearing inner race to drive pinion as far as drive pinion lock nut can be tightened.

A	: Drift [SST: KV40100610 (J-26089)]
B	: Press stand [SST: ST38220000 ( — )]
C	: Drift [SST: ST23860000 ( — )]

Temporarily tighten removed drive pinion lock nut to drive pinion.

NOTE:

Use removed drive pinion lock nut only for the preload measurement.

Rotate drive pinion more than 20 times to adjust bearing. Fit the drive pinion socket (A) onto the drive pinion. Using the pinion nut wrench (B), tighten drive pinion lock nut holding drive pinion, while adjusting pinion bearing preload torque using preload gauge (C).

A	: Drive pinion socket [SST: KV38109500 ( — )]
B	: Pinion nut wrench [SST: KV38109400 ( — )]
C	: Preload gauge [SST: ST3127S000 (J-25765-A)]

Pinion bearing preload

: Refer to Preload Torque.

CAUTION:

Drive pinion lock nut is tightened with no collapsible spacer. Be careful not to overtighten it. While measuring the preload, tighten it by 5° to 10°.

Install new side bearing adjusting shims (2 pieces for one side) with the same thickness or re-install the old ones to the same mounting position they were in prior to disassembly. Install differential assembly to gear carrier. Refer to Disassembly and Assembly.

CAUTION:

Apply differential gear oil to the side bearings.

Check and adjust tooth contact, drive gear to drive pinion backlash. Refer to Adjustment. Remove differential assembly. Remove drive pinion assembly from gear carrier Remove drive pinion nut and press drive pinion assembly out of gear carrier. Remove pinion front bearing inner race.

Assemble collapsible spacer to drive pinion .

CAUTION:

• Be careful of the mounting direction of collapsible spacer.

• Do not reuse collapsible spacer.

Assemble drive pinion into gear carrier.

CAUTION:

Apply gear oil to pinion rear bearing.

Assemble pinion front bearing inner race to drive pinion assembly.

CAUTION:

• Do not reuse pinion front bearing inner race.

• Apply gear oil to pinion front bearing.

Using the drifts (A and C) and press stand (B), press pinion front bearing inner race to drive pinion as far as drive pinion lock nut can be tightened.

A	: Drift [SST: KV40100610 (J-26089)]
B	: Press stand [SST: ST38220000 ( — )]
C	: Drift [SST: ST23860000 ( — )]

Apply anti-corrosion oil to the thread and seat of drive pinion lock nut, and temporarily tighten drive pinion lock nut to drive pinion.

CAUTION:

Do not reuse drive pinion lock nut.

Fit the drive pinion socket (A) onto the drive pinion. While holding drive pinion, tighten drive pinion lock nut within the limits of specified torque so as to keep the pinion bearing preload within a standard values, using the pinion nut wrench (B) and the preload gauge (C).

A	: Drive pinion socket [SST: KV38109500 ( — )]
B	: Pinion nut wrench [SST: KV38109400 ( — )]
C	: Preload gauge [SST: ST3127S000 (J-25765-A)]

Drive pinion lock nut tightening torque	: Refer to Exploded View.
Pinion bearing preload	: Refer to Preload Torque.

CAUTION:

• Adjust the lower limit of the drive pinion lock nut tightening torque first.

• If the preload torque exceeds the specified value, replace collapsible spacer and tighten it again to adjust. Do not loose n drive pinion lock nut to adjust the preload torque.

• After adjustment, rotate drive pinion back and forth 2 to 3 times to check for unusual noise, rotation malfunction, and other malfunctions.

Install differential assembly. Refer to Disassembly and Assembly.

CAUTION:

Do not install rear cover at this timing.

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

Remove dummy cover set, then install rear cover, and side oil seal. Refer to Disassembly and Assembly.

Check total preload torque. Refer to Adjustment.

Using the drift (A) [SST: ST35271000 (J-26091)], install drive pinion oil seal within the dimension (D) shown as follows.

D	: 0.8 – 1.2 mm (0.031 – 0.047 in)

CAUTION:

• Do not reuse oil seal.

• When installing, do not incline oil seal.

• Apply multi-purpose grease onto oil seal lips, and gear oil onto the circumference of oil seal.

Install electric controlled coupling assembly. Refer to Disassembly and Assembly.

Inspection

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.