Removal And Installation

FRONT OIL SEAL


Removal and Installation


REMOVAL

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. Refer to "Identification stamp of replacement frequency of front oil seal". If collapsible spacer replacement is necessary, remove final drive assembly and disassemble it to replace front oil seal and collapsible spacer. Disassembly.

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. Disassembly.






CAUTION:
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 below in order to identify replacement frequency.

CAUTION:
Make a stamping from left to right.





1. Make a judgment if a collapsible spacer replacement is required.
2. Drain gear oil. Draining.
3. Remove final drive assembly. Removal And Installation.

NOTE:
- It is necessary to separate the rear drive shaft from final drive to measure the total preload.
- It is necessary to remove final drive assembly to separate the rear drive shaft from final drive.





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

NOTE:
Record the preload measurement.





5. 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. Never damage companion flange and drive pinion.





6. Remove drive pinion lock nut using the flange wrench. (commercial service tool)





7. Remove companion flange using pullers (commercial service tool).
8. Remove front oil seal using the puller [SST: KV381054S0 (J-34286)].

INSTALLATION
1. Apply multi-purpose grease to front oil seal lips.





2. Install front oil seal using the drift (A) [SST: KV40104710 ( --
)] as shown in figure.

CAUTION:
- Never reuse oil seal.
- Never 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, using flange wrench (commercial service tool).

CAUTION:
Never reuse drive pinion lock nut.
5. Tighten drive pinion lock nut within the limits of specified torque so as to keep the pinion bearing preload within a standard values, using preload gauge (A) [SST: ST3127S000 (J-25765-A)].

Total preload torque : A value that add 0.1 - 0.4 Nm (0.01 - 0.04 kg-m, 0.1 - 0.3 in-lb) to the measured value before removing.

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. Never loosen drive pinion lock nut to adjust the preload torque.
6. Make a stamping for identification of front oil seal replacement frequency. Refer to "Identification stamp of replacement frequency of front oil seal".

CAUTION:
Make a stamping after replacing front oil seal.
7. Install final drive assembly. Removal And Installation.
8. Refill gear oil to the final drive and check oil level. Refilling.
9. Check the final drive for oil leakage. Inspection.