WHEELS, RIMS AND TIRES
If the inner wheel bearing is smaller than the opening in
the seal, it is permissible to assemble the bearing on the
spindle first, then install hub assembly with seal.
However, do not leave excessive lubricant contact seal
as it will erroneously appear as a leaking seal.
Should it be necessary to remove the wheel assembly
from the spindle due to hang-ups, it is necessary to
recheck the seal for proper installation. In some cases
the seal will be separated. The inner half must be
removed by hand from the spindle shoulder. Reinsert
inner half in outer wheel seal by snapping together.
Then reinstall seal assembly.
Guardian Oil Seal
The Guardian oil seal grit guard is installed in the same
manner as the wiper ring, previously described and
shown in Figure 20.
The seal is then positioned on the wiper ring assembly
with lip of seal toward the bearing cavity of the hub. The
hub assembly is then positioned over the axle tube or
spindle and seal assembly. This assures that the seal is
in place over the wiper ring, as shown in Figure 19.
Do not install the Guardian seal in the hub first since the
seal could be pushed into the hub deep enough so that
the installation could result as shown in Figure 26, and
the seal effect would not be accomplished (arrows).
Figure 26. - Improper Installation of Guardian Oil Seal
WHEEL BEARING
INSPECTION
Inspect inner and outer wheel bearing cups, cones and
roller for wear or damage. If any following conditions
exist, the bearing must be replaced If:
Large ends of rollers are worn flush to recess, or radii at
large ends of rollers are worn sharp (Figure 27).
Figure 27.
There is a visible wear step, particularly at the large end
of roller and roller track, or deep indentations, cracks or
breaks in bearing cup and/or cone surfaces (Figure 28).
Figure 28.
There are bright rubbing marks on the dark phosphate
surfaces of the bearing cage (Figure 29).
Figure 29.
CTS-4148A
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