Adjustment

DRIVE PINION


Adjustment


TOTAL PRELOAD TORQUE
1. Remove electric controlled coupling assembly. Disassembly.
2. Rotate drive pinion back and forth 2 to 3 times to check for unusual noise and rotation malfunction.





3. Rotate drive pinion at least 20 times to check for smooth operation of the bearing.
4. Fit drive pinion socket onto drive pinion spline. Measure the total preload, using the preload gauge (A) [SST: 3127S000 (J-27565A)] and drive pinion socket (B) [SST: KV38108500 -- )].

Standard Total preload torque : Rear Final Drive R145.


NOTE:
Total preload torque = Pinion bearing torque + Side bearing torque
- If measured value is out of the specification, disassemble it to check and adjust each part. Adjust the pinion bearing preload and side bearing preload.
Adjust the pinion bearing preload first, then adjust the side bearing preload.






DRIVE GEAR RUNOUT
1. Remove rear cover. Disassembly.
2. Following the procedure below, install a dummy cover set [SST: KV381086S1 ( -- )] to gear carrier.
a. Set dummy cover shims [SST: KV38108630 ( -- )] to the right and left side bearing adjusting shims.
b. Temporarily tighten dummy cover [SST: KV38108610 ( -- )] to gear carrier.
c. Position dummy cover spacers [SST: KY38108621 ( -- )] to dummy cover [SST: 38108610
( -- )].
d. Tighten rear cover mounting bolts to the specified torque. Exploded View.
e. Tighten dummy cover spacer mounting bolts evenly to the specified torque.

Torque : 5.9 N.m (0.6 kg-m, 52 in-lb)






3. Fit a dial indicator to the drive gear back face.
4. Rotate the drive gear to measure runout.

Limit Drive gear back face runout : Drive Gear Runout.

- If the runout is outside of the repair limit, check drive gear assembly condition; foreign material may be caught between drive gear and differential case, or differential case or drive gear may be deformed, etc. CAUTION:
Replace drive gear and drive pinion as a set.

TOOTH CONTACT
1. Remove rear cover. Disassembly.
2. Following the procedure below, install a dummy cover set [SST: KV381086S1 ( -- )] to gear carrier.
a. Set dummy cover shims [SST: KV38108630 ( -- )] to the right and left side bearing adjusting shims.
b. Temporarily tighten dummy cover [SST: 38108620 ( -- )] to gear carrier.
c. Position dummy cover spacers [SST: 38108621 ( -- )] to dummy cover [SST: 38108620 ( --
)].
d. Tighten rear cover mounting bolts to the specified torque. Exploded View.
e. Tighten dummy cover spacer mounting bolts evenly to the specified torque.

Torque: 5.9 N.m (0.6 kg-m, 52 in-lb)






3. Apply red lead to drive gear.

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





4. Rotate drive gear back and forth several times, check drive pinion gear to drive gear tooth contact.

CAUTION:
Check tooth contact on drive side and reverse side.
Tooth Contact Judgment Guide










5. If tooth contact is improperly adjusted, follow the procedure below to adjust the pinion height (dimension X).





- If the tooth contact is near the face (face contact), or near the heel (heel contact), thicken drive pinion gear adjusting shim to move drive pinion closer to drive gear.





- If the tooth contact is near the flank (flank contact), or near the toe (toe contact), thin drive pinion gear adjusting shim to move drive pinion farther from drive gear.

BACKLASH
1. Remove rear cover. Disassembly.
2. Following the procedure below, install a dummy cover set [SST: KV381086S1 ( -- )] to gear carrier.
a. Set dummy cover shims [SST: KV38108630 ( -- )] to the right and left side bearing adjusting shims.
b. Temporarily tighten dummy cover [SST: KV38108610 ( -- )] to gear carrier.
c. Position dummy cover spacers [SST: KV38108621 ( -- )] to dummy cover [SST: KV38108610
( -- )].
d. Tighten rear cover mounting bolts to the specified torque. Exploded View.
e. Tighten dummy cover spacer mounting bolts evenly to the specified torque.

Torque : 5.9 N.m (0.6 kg-m, 52 in-lb)






3. Fit a dial indicator to the drive gear face to measure the backlash.

Standard Backlash : Backlash.

- If the backlash is outside of the specified value, change the thickness of side bearing adjusting shims.