Drive Pinion and Bearing Cage Disassembly
1.
Place the drive pinion and
bearing cage in a press.
The shaft end should be
positioned toward the top of
the assembly.
2.
Support the bearing cage
under the flange area with
metal or wooden blocks.
3.
Press the drive pinion
through the bearing cage
(
Figure 8-78
). Do not allow
the pinion to fall to the floor
from the press when the
bearing is free.
4.
If the pinion oil seal is
mounted directly in the
outer bore of the bearing
cage, remove the seal at
this time. Be careful that
the mounting surfaces of
the bearing cage are not
damaged.
5.
If the seal is a one-piece
Figure 8-78 - Pressing the drive pinion
from the bearing cage.
design (without mounting flange), discard the seal. If the seal is a triple-lid design
(with flange), inspect the seal for damage. If the surfaces of the seal and yoke or
flange are smooth and not worn or damaged, it is possible to reuse the seal again
during reassembly of the unit. However, replacement is recommended to prevent
the cost associated with premature seal failure in the rebuilt unit.
6.
If the pinion bearings need to be replaced, remove the inner and outer bearing
cups from the inside of the cage. Use a press and sleeve, bearing puller, or a
small drift and hammer.
7.
If the pinion bearings need to be replaced, remove the inner bearing cone from
the drive pinion with a press or bearing puller. The puller must fit under the inner
race of the cone to remove it correctly without damage.
8.
If the spigot bearing needs to be replaced, put the drive pinion in a vise. Install a
soft metal cover over each vise jaw to protect the drive pinion.
9.
Remove the snapping from the end of the drive pinion (
Figure 8-79
).
10.
Remove the spigot bearing from the drive pinion with a bearing puller.
Differential Carrier Reassembly
The reassembly procedure is essentially a reversal of the disassembly procedure. The
procedure outlined is general. Always refer to the service manual for the proper and
detailed procedures for the unit being overhauled.
NAVEDTRA 14050A
8-78