8.
Lubricate the inner diameter of the seals
installed in Step 3 above. Using a twisting
motion, insert the pinion shaft through the
carrier housing.
9.
With the spur gear end of the shaft in the
downward position on the table, install the
bevel gear over splined end of the shaft.
10. Apply light pressure to the bevel gear and
shaft. Spin the carrier housing several times
to seat the bearings.
11. Place the cap (Fig. 2.6, Item 20) over the
spiral bevel gear and secure using three
5/16-18 screws (Fig. 2.6, Item 19). Torque
bolts to 20 lb-ft to ensure bearings and
bearing cups are seated properly. Remove
the three bolts and the cap.
12. Using a depth micrometer, measure and
record the depth from the face of the bevel
gear to the end of the pinion shaft (see Fig.
2.13). A carrier shaft shim package (Fig. 2.6,
Item 21) should be assembled 0.003" greater
than the recorded bevel gear to pinion shaft
depth. Verify shim package thickness using a
micrometer; then place the package on pinion
shaft end.
Example:
Measured Depth = 0.010"
Add 0.003
= 0.003" +
Total Shim Package
= 0.013"
13. Place the cap over the shim package and
secure using three 5/16-18 screws. Torque to
20 lb-ft.
14. Again, spin housing to seat bearings.
15. Invert the carrier with ring gear down and
place supporting blocks on the mounting
flange at the bolt circle diameter. This will
suspend the ring gear.
16. Place a magnetic base indicator on the small
flange end of the carrier with indicator probe
on end of spur gear.
17. Pry upward on the cap to observe the
endplay. Add or remove shims as necessary
until an endplay of 0.000" to 0.002" is
obtained.
NOTE
If there is no endplay, and the pinion shaft
cannot be turned freely by hand, the bearings
are too tight. Increase the shim thickness
under the cap.
18. Remove retaining bolts and reassemble using
a permanent thread locking compound with a
minimum temperature rating of at least 450
o
F. If there are no wire tie holes in the bolts,
torque to 20 lb-ft.
19. Refer to DRIVE UNIT REBUILD - ASSEMBLY
to reassemble the drive unit.
E
lectric
C
ounterbalance
H
igh
O
utput
Drive
12/20/99
1.12
Figure 2.13 - Measure Shim Depth
Figure 2.12 - Support Spiral Bevel Gear
