Assembly

DRIVE PINION


Assembly






1. Install outer race of pinion bearing (front) to the gear carrier with the drift (A) [SST: ST33190000 ( -- )].

CAUTION:
- At first, using the hammer, tap outer race of bearing until it becomes flat to gear carrier.
- Never reuse pinion bearing.





2. Install outer race of pinion bearing (rear) to the gear carrier with the drift (A) [SST: ST37830000 ( -- )].

CAUTION:
- At first, using the hammer, tap outer race of bearing until it becomes flat to gear carrier.
- Never reuse pinion bearing.





3. Temporarily install drive pinion adjusting shim (1).

When hypoid gear set has been replaced
- Select drive pinion adjusting shim. Adjustment.

When hypoid gear set has been reused
- Temporarily install the removed drive pinion adjusting shim or same thickness shim to drive pinion.

CAUTION:
Pay attention to the direction of drive pinion adjusting shim. (Assemble as shown in the figure.)





4. Install inner race of pinion bearing (rear) (1) to drive pinion with the drift (A) [SST: ST33032000 ( -- )].

CAUTION:
Never reuse pinion bearing.





5. Assemble collapsible spacer (1) to drive pinion (2).

CAUTION:
- Be careful of the mounting direction of collapsible spacer.
- Never reuse collapsible spacer.
6. Assemble drive pinion into gear carrier.

CAUTION:
Apply gear oil to pinion bearing.
7. Assemble inner race of pinion bearing (front) to drive pinion assembly.

CAUTION:
- Never reuse pinion bearing.
- Apply gear oil to pinion bearing.





8. Using the drift (A) [SST: KV37710000 ( -- )], press the inner race of pinion bearing (front) to drive pinion as far as drive pinion nut can be tightened.





9. Using the drift (A) (Commercial service tool), drive front oil seal until it becomes flush with the gear carrier end.

CAUTION:
- Never reuse oil seal.
- When installing, never incline oil seal.
- Apply multi-purpose grease onto oil seal lips, and gear oil onto the circumference of oil seal.
10. Install companion flange.

NOTE:





When reusing drive pinion, align the matching mark (A) of drive pinion with the matching mark (B) of companion flange (1), and then install companion flange.





11. Apply anti-corrosion oil to the thread and seat of drive pinion lock nut, and temporarily tighten drive pinion lock nut to drive pinion, using the flange wrench (Commercial service tool).

CAUTION:
Never reuse drive pinion lock nut.
12. Adjust to the drive pinion lock nut tightening torque and pinion bearing preload torque, using the preload gauge (A) [SST:
ST3127S000 (J-25765-A)].






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.
- After adjustment, rotate drive pinion back and forth 2 to 3 times to check for unusual noise, rotation malfunction, and other malfunctions.
13. Install center stem assembly. Assembly.

CAUTION:
Never install rear cover at this timing.
14. Check and adjust drive gear runout, tooth contact, drive gear to drive pinion backlash, and companion flange runout. Adjustment and Adjustment.
15. Check total preload torque. Adjustment.
16. Install rear cover. Assembly.
17. Install electric controlled couplings. Assembly.