Front Oil Seal
FRONT OIL SEALRemoval and Installation
CAUTION: Verify identification stamp of replacement frequency put in the lower part of gear carrier to determine replacement for collapsible spacer when replacing front oil seal. If necessary collapsible spacer replacement, remove final drive assembly and disassemble it to replace front oil seal and collapsible spacer.
NOTE: The reuse of collapsible spacer is prohibited in principle. However, it is reusable on a one-time basis only in cases when replacing front oil seal.
IDENTIFICATION STAMP OF REPLACEMENT FREQUENCY OF FRONT OIL SEAL
^ The diagonally shaded area in the figure shows stamping point for replacement frequency of front oil seal.
^ The following table shows if collapsible spacer replacement is needed before replacing front oil seal.
When collapsible spacer replacement is required, disassemble final drive assembly to replace collapsible spacer and front oil seal.
CAUTION: Be sure to make a stamping after replacing front oil seal.
^ After replacing front oil seal, make a stamping on the stamping point in accordance with the table in order to identify replacement frequency
CAUTION: Stamping shall be made from left to right.
REMOVAL
1. Drain gear oil.
2. Make a judgment if a collapsible spacer replacement is required.
3. Remove center muffler with a power tool.
4. Remove rear wheel sensor.
5. Remove drive shaft from final drive. Then suspend it by wire etc.
6. Install attachment to side flange, and then pull out the side flange with the sliding hammer.
^ For VQ35DE models
Tool number
A: KV40104100 ( - )
B: ST36230000 (J-25840-A)
NOTE: Circular clip installation position: Final drive side
^ For VK45DE models
Tool number
A: KV40101000 ( - )
B: ST36230000 (J-25840-A)
NOTE: Circular clip installation position: Final drive side
7. Remove propeller shaft.
8. Measure the total preload with the preload gauge.
Tool number A: ST3127S000 (J-25765-A)
NOTE: Record the preload measurement.
9. Put matching mark (B) on the end of the drive pinion. The matching mark (B) should be in line with the matching mark (A) on companion flange (1).
CAUTION: For matching mark, use paint. Do not damage companion flange and drive pinion.
NOTE: The matching mark (A) on the final drive companion flange (1) indicates the maximum vertical runout position.
10. Remove drive pinion lock nut using the flange wrench.
11. Remove companion flange using a puller.
12. Remove front oil seal using the puller.
Tool number A: KV381054S0 (J-34286)
INSTALLATION
1. Apply multi-purpose grease to front oil seal lips.
2. Install front oil seal using the drift as shown in figure.
Tool number A: ST30720000 (J-25405)
CAUTION:
^ Do not reuse oil seal.
^ Do not incline oil seal when installing.
3. Align the matching mark (B) of drive pinion with the matching mark (A) of companion flange (1), and then install the companion flange (1).
4. Apply anti-corrosion oil to the thread and seat of new drive pinion lock nut, and temporarily tighten drive pinion lock nut to drive pinion.
CAUTION: Do not reuse drive pinion lock nut.
5. Tighten to drive pinion lock nut, while adjust total preload torque.
Tool number A: ST3127S000 (J-25765-A)
Drive pinion lock nut tightening torque: 147 - 323 Nm (15 - 32 kg-m, 109 - 203 ft. lbs.)
Total preload torque: Total preload torque should equal the measurement taken during removal plus an additional 0.1 - 0.4 Nm (0.01 - 0.04 kg-m, 1 - 3 inch lbs.).
CAUTION:
^ Adjust to 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 loosen drive pinion lock nut to adjust the preload torque.
6. Make a stamping for identification of front oil seal replacement frequency.
CAUTION: Be sure to make a stamping after replacing front oil seal.
7. Install propeller shaft.
8. Install side flange with the following procedure.
a. Attach the protector to side oil seal.
Tool number: KV38107900 (J-39352)
b. After the side flange is inserted and the serrated part of side gear has engaged the serrated part of flange, remove the protector.
c. Put a suitable drift on the center of side flange, then drive it until sound changes.
NOTE: When installation is completed, driving sound of the side flange turns into a sound which seems to affect the whole final drive.
d. Confirm that the dimension of the side flange installation (Measurement A) in the figure comes into the following.
Measurement A: 326 - 328 mm (12.83 - 12.91 inch)
9. Install drive shaft.
10. Install rear wheel sensor.
11. Install center muffler.
12. Refill gear oil to the final drive and check oil level.
13. Check the final drive for oil leakage.