WHEELS, RIMS AND TIRES
COTTER KEY INSTALLATION
The cotter key should be inserted with the long tang
toward the end of the spindle. Bend long tang of cotter
key over end of spindle. Clip remaining tang leaving just
enough stock to bend down against side of nut. A
correctly installed cotter key should have the appearance
as shown in Figure 13.
Figure 13.
WHEEL SEALS
To Insure satisfactory performanceof wheel seals,
various precautions are necessary Whether the vehicle
is equipped with grease or oil lubricated wheel bearings.
Always replace wheel seals whenever the wheel and hub
assembly is removed. Seals establish a wear patter
after a period of usage and a reused seal may not be
positioned back in its original location and leakage could
result.
Due to various types of wheel seals, it is important that
the seal installation and position be checked at the time
of disassembly to be assured that the new seals are
properly installed.
The types of wheel seals used are designed to be used
with grease packed wheel bearings and oil lubricated
wheel bearings.
GREASE LUBRICATED WHEEL BEARING
For the most part the seals used with grease lubricated
wheel bearings will be of the lip type seal similar to that
shown in Figure 14. The seal is installed with lip toward
the inner wheel bearing.
Scot unitized seals and Barrier unitized seals can also be
used with grease lubricated wheel bearings.
Figure 14. - Wheel Seals Used With Grease Lubricated
Wheel Bearings
OIL LUBRICATED WHEEL BEARING
Different versions of oil lubricated wheel bearings will be
found, and they are:
Stemco Lip Type Seal With Wiper Ring The metal
encased lip type seals shown in Figures 15 and 16 have
a wiper ring or wear sleeve mounted on the axle or
spindle. The wiper ring provides a smooth contact
surface for the lip of the seal, which is also replaced
when seals are replaced. The lip of a seal can wear a
groove in the axle or spindle at that point where the lip
makes contact. The oil lubricated seal shown in Figure
16 has an added feature called grit guard. The grit guard
is a shielded extension on the wiper ring to prevent grit
and road splash entering the seal.
CTS-4148A
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