1. Bead ledge
2. Bead seat radius
4. Tubewell seal
5. Brake key
6. Valve stem
8. Spoke or face
17. Bearing cup
18. Tie-bolt & nut
19. Tubewell I.D. surface
20. Rim flange
Bearing retaining shoulder
21. Tubewell O.D. surface
22. Fusible plug
Bearing cone & rollers
Figure 11-1.Typical divided (split) wheel assembly.
The demountable flange is attached to the wheel
to simplify tire removal and installation. The
remountable flange lockring secures the flange to the
wheel. The flange is fitted into a groove in the wheel
The bearing cups are shrink-fitted into the hub of
the wheel casting, and are the parts on which the
The bearings are tapered roller
bearings. Each bearing is made of a cone and rollers.
This type of bearing absorbs side thrust as well as
radial loads and landing shocks. These bearings must
be cleaned and lubricated in accordance with the
NAVAIR 04-10-1 manual.
A three-piece grease retainer keeps the grease in
the inboard bearing and keeps out dirt and moisture.
It is composed of a felt seal and inner and outer
closure rings. A lockring secures the assembly inside
the wheel hub.
The hubcap seals the outboard side of the hub. It
is secured with a lockring.
On some aircraft, the
hubcap is secured with screws.
All wheels designed to be used on the main
landing gear are equipped with braking components.
These components are attached to the wheel casting.
They may consist of either a brake
The wheel shown in
drum or brake
figure 11-3 is