Nissan Murano: Unit Disassembly and Assembly / Drive Pinion

Exploded View

	Oil seal		Transfer cover		Filler plug
	Gasket		Drain plug		Oil seal
	O-ring		Ring gear bearing adjusting shim (transfer cover side)		Ring gear bearing (transfer cover side)
	Drive shaft oil seal		Ring gear shaft		Ring gear bearing (transfer case side)
	Ring gear bearing adjusting shim (transfer case side)		Ring gear		Baffle plate
	Transfer case		Plug		O-ring
	Oil seal		Dowel pin		Drive pinion
	Drive pinion adjusting shim		O-ring		Pinion bearing assembly
	Oil seal		Dust cover		Companion flange
	Pinion lock nut
	Oil seal lip		Comply with the assembly procedure when tightening. Refer to Disassembly and Assembly.
: N·m (kg-m, in-lb)
: N·m (kg-m, ft-lb)
: Always replace after every disassembly.
: Apply gear oil.
*: Apply anti-corrosive oil.
: Apply multi-purpose grease.
: Select with proper thickness.

DISASSEMBLY

Remove pinion bearing assembly mounting bolts.

Lightly tap companion flange with a plastic hammer to remove drive pinion assembly .

Remove the O-ring from pinion bearing.

Remove the pinion lock nut.

Remove drive pinion from pinion bearing assembly with drift (A) (commercial service tool) and bearing separator (B) (commercial service tool).

Remove adjusting shim.

Remove companion flange.

Remove the dust cover.

Remove the oil seal.

Perform inspection after disassembly. Refer to Inspection.

ASSEMBLY

Select drive pinion adjusting shim. Refer to Adjustment.

Assemble the selected drive pinion adjusting shim to drive pinion.

Install the drive pinion to pinion bearing assembly with drift (commercial service tool).

CAUTION:

• Do not reuse pinion bearing assembly.

• Apply gear oil to pinion bearing part.

Install oil seal to pinion bearing assembly with drift (A) (commercial service tool).

CAUTION:

• Do not reuse the oil seal.

• When installing, Do not incline oil seal.

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

Install dust cover.

NOTE:

Tighten dust cover together with pinion bearing assembly.

Install companion flange to pinion bearing with drift (A) (commercial service tool).

Apply anti-corrosive oil to the thread and seat of the lock nut, and adjust the pinion lock nut tightening torque and pinion bearing preload torque, using a preload gauge.Install pinion lock nut, and then tighten to the specified torque.

CAUTION:

• Do not reuse pinion lock nut.

• Check that pinion lock nut is seated on the companion flange.

Apply multi-purpose grease lightly and evenly onto an O-ring, and install it to the pinion bearing assembly.

CAUTION:

• Do not reuse O-ring.

• When installing O-ring, Do not use a tool.

• Do not damage O-ring.

Install drive pinion assembly, and apply anti-corrosive oil onto thread and seats on the mounting bolts. Tighten to the specified torque.

NOTE:

Tighten dust cover together with pinion bearing assembly.

Check backlash, tooth contact, total preload and companion flange runout. Refer to Adjustment.

CAUTION:

Measure the total preload without oil seals of transfer cover and transfer case.

ADJUSTING SHIM SELECTION

Measurement point

Select adjusting shim of T1, T2, and T3, respectively, by using the following equation.

T1 [Ring gear bearing adjusting shim (transfer case side)]

• T1 = A −(B +X/2) +C +W −V −F −(M/100) +0.071 mm (0.0028 in)

T2 [Ring gear bearing adjusting shim (transfer cover side)]

• T2 = −Y +Z +(B +X/2) −C −D −H +(M/100) +0.071 mm (0.0028 in)

T3 (Drive pinion adjusting shim)

• T3 = −Q +(R +S/2) −K +(O/100)

• Check dimension (M) on the ring gear side face.

  

  NOTE:

  Dimension “M” indicates the difference between the optimum engagement and standard dimensions in increments of 0.01 mm (0.0004 in) written on the ring gear side face.

• Check dimension (O) on the gear end of drive pinion.

  

  NOTE:

  Dimension “O” indicates the difference between the optimum engagement and the standard dimensions in increments of 0.01 mm (0.0004 in) written on the gear end of drive pinion.

PINION BEARING PRELOAD

CAUTION:

When measuring preload, the rotating speed must be set to 30 rpm.

Remove ring gear shaft assembly from the transfer case. Refer to Disassembly and Assembly.

Rotate the companion flange back and forth from 2 to 3 times to check for unusual noise, binding, sticking, and so on.

Rotate the companion flange at least 20 times to check for smooth operation of the bearing.

Measure the pinion bearing preload with the preload gauge (A) [SST: ST3127S000 (J-25765-A)].

CAUTION:

Each rotational part should rotate smoothly with the specified gear oil.

• If outside the standard, disassemble the drive pinion assembly to check and adjust each part.

TOTAL PRELOAD

CAUTION:

When measuring preload, the rotating speed must be set to 30 rpm.

Measure pinion bearing preload.

CAUTION:

Check that the pinion bearing preload is within the standard.

Assemble the ring gear shaft assembly to the transfer case. Refer to Disassembly and Assembly.

Install transfer cover to check and adjust each part. Refer to Disassembly and Assembly.

Rotate the companion flange at least 20 times to check for smooth operation of the bearing.

Measure the total preload with the preload gauge (A) [SST: ST3127S000 (J-25765-A)].

CAUTION:

Each rotational part should rotate smoothly with the specified gear oil.

• If outside the standard, disassemble the transfer assembly to check and adjust each part. Measure it with the transfer case oil seal and transfer cover oil seal removed when measuring total preload after disassembly. Then install transfer case oil seals and transfer cover oil seal.

BACKLASH

Install the bolt to the companion flange.

Fit a dial indicator onto the bolt .

Measure the circumference backlash of the companion flange.

• If outside the standard, disassemble the transfer assembly to check and adjust each part.

TOOTH CONTACT

Remove transfer cover. Refer to Disassembly and Assembly.

Remove ring gear shaft assembly from transfer case. Refer to Disassembly and Assembly.

Apply red lead onto the ring gear.

CAUTION:

Apply red lead to both faces of 3 to 4 gears at 4 locations evenly spaced on the ring gear.

Assemble the ring gear shaft assembly to the transfer case. Refer to Disassembly and Assembly.

Install transfer cover to check and adjust each part. Refer to Disassembly and Assembly.

NOTE:

At this timing, O-ring installing to transfer cover is not necessary. Install O-ring after backlash and tooth contact are checked.

Remove the plug from the transfer case.

Rotate the companion flange back and forth several times, and check the drive pinion gear to ring gear tooth contact by viewing from the plug hole.

Tooth Contact Judgment Guide

Follow the procedure below to adjust pinion height (dimension X) if tooth contact is improper. For selecting adjusting shim, refer to the latest parts information.

CAUTION:

If no adjusting shim with the calculated value is available, select the thicker and closest one.

• Thicken the drive pinion adjusting shim to move the drive pinion closer to the ring gear in case of face contact or heel contact.

  

  CAUTION:

  Only one adjusting shim can be selected.

• Thin the drive pinion adjusting shim to move the drive pinion farther from the ring gear in case of flank contact or toe contact.

  

  CAUTION:

  Only one adjusting shim can be selected.

COMPANION FLANGE RUNOUT

Fit a dial indicator onto the companion flange face (inner side of the propeller shaft mounting bolt holes).

Rotate the companion flange to check for runout.

Fit a test indicator to the inner side of the companion flange (socket diameter).

Rotate the companion flange to check for runout.

Follow the procedure below to adjust if runout value is outside the repair limit.Check for runout while changing the phase between companion flange and drive pinion in 90° steps. Then search for the minimum point. Replace companion flange if runout value is still outside the limit after the phase has been changed. Adjust assembly status of the pinion bearing and drive pinion, or replace pinion bearing assembly if runout is outside the standard after the companion flange is replaced.

INSPECTION AFTER DISASSEMBLY

Check items below. If necessary, replace them with new ones.

Gear and Shaft

Check gear face and shaft for wear, cracks, damage, and seizure.

Replace ring gear and drive pinion as a set (hypoid gear set) if any malfunction is detected on the ring gear or drive pinion.

Bearing

Check for seizure, peeling, wear, corrosion, sticking, unusual noise, roughness in hand turning, and other damage.

Shim

Check for seizure, damage, and unusual wear.