TM 9-2330-388-14
(b) Install inner seal using seal replacement
Compressed air used for drying or cleaning
tool.
purposes must not exceed 30 psi (207 kPa).
Wear protective clothing (goggles and
(c) Install tire, wheel, hub, and brake drum
gloves) and use caution to avoid injury to
assembly (step g).
personnel.
g.
Installation and Adjustment of Tires, Wheels,
CAUTION
Hub, and Drum as an Assembly
Do not clean parts with gasoline, In a hot
solution tank, or with water and alkaline
NOTE
solutions. Separate wheels and hub before
Jack may be adjusted to compensate for hub
cleaning.
Dry cleaning solvent will
spindle misalinement when Installing hub to
deteriorate the tires.
spindle.
Do not spin bearings with compressed air.
(1) Position hub and drum assembly on spindle
with tires resting on greased plate. If drum binds on
(a) Thoroughly clean all parts with d cleaning
brake shoes when partially installed, adjust brake shoes
to reduce brake shoe spread. Push hubs fully onto
Ensure that parts are completely dry. use low pressure
spindle.
compressed air to dry parts, if available.
(2) Jack wheel completely off ground.
NOTE
If wheel bearings need replacing, bearing
(3) Tighten inner bearing nut to 200 lb-ft while
cups must also be replaced (Step d).
rotating hub and drum assembly.
(b) Inspect wheel bearings for cracks breaks in
(4) Back off inner bearing nut approximately
bearing cage, etching or pitting on roller surfaces faces,
1/4 to 1/3 turn so dowel on nut will aline with hole in lock
and any evidence of wear. Replace if worn damaged.
ring when tab on lock ring is positioned on axle spindle
keyway. Install lock ring, wheel bearing washer, and
(c) Pack bearings from large end of cone with
outer wheel bearing nut. Tighten outer wheel bearing nut
to 200-225 lb-ft.
between rollers and cage are filled. Cover beings with a
clean, lint-free rag until time to install.
(5) Apply a light coat of grease (item 17,
(d) Inspect bearing cups in hub for pit grooves,
on hub.
or flaking. If damaged, use a puller to remove. Drive in
new bearing with a suitable driver.
(6) Install hub cap and secure with six bolts
(e) Inspect hub cab for damage to flange that
would allow water to leak into wheel bearings. R place if
(7) Pressurize air system by attaching towing
damaged.
vehicle air lines to semitrailer and starting towing vehicle
engine.
(f)
Replace hub cab gasket.
(g) Check threads of studs, screws, and nuts
for damage.
(9) Manually release fail-safe chamber power
(h) Inspect brake drum for pitting or scoring.
Inspect hub bearing surface for damage. If brake drum
(10) Remove any blocking from tires.
is damaged, notify direct support maintenance for repair.
h.
Wheel Studs
(a) Ensure that the spindle is thoroughly clean.
Apply light coat of grease.
(a) Remove wheels and tires.
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