TRUCK SERVICE MANUAL
WHEELS, RIMS, TIRES
OIL SEAL INSTALLATION (OIL SEAL WITH AXLE
UNITIZED OIL SEAL (AXLE RING NOT REQUIRED)
Unitized oil seals do not require axle rings
1. Remove burrs from inside back edge of hub.
(wipers) and minimize wear on the axle spindle as
Hub must be smooth and free from burrs that will
follows. The outer shell of the seal being pressure fit in
scratch the hub seal.
the wheel hub rotates with the wheel around the sealing
2. Apply a thin coat of Permatex No. 2 around the
element which is pressure fit on the axle spindle. With
outside perimeter of hub seal. Permatex coating
the unitized seal when replacement is made, the worn
must be very light yet cover press fit area.
surface created by the sealing lip is also replaced.
Remember that Permatex is abrasive and should
never be allowed to contact lip of leather seal nor
3. Lay wheel flat with brake drum up. Place inner
wheel bearing into bearing cup and place hub
seal into starting position on hub.
4. Install hub seal using SE-1904 Installer Set (Fig.
6). Select the size disc which will apply force to
outer edge of hub seal and prevent seal from
becoming distorted or damaged.
5. Drive hub seal into hub until it bottoms in hub
bore. Do not continue to drive after seal is once
seated as this will distort or damage the seal.
After removal of seal installer tool, clean off
excess Permatex (for proper installation, note