TM 9-2330-356-14
c. Replacement of Wheel Bearings (M967, M969, and
NOTE
M970 except M970 SN TC-0843, TC-0844, and TC-103 thru
If wheel bearings need replacing, bearing
TC-178) (F{g. 4-86).
cups must also be replaced (Step (d)).
(1) Removal.
(b) Inspect wheel bearings for cracks or
(a) Remove tires, wheels hub and drum as
breaks in bearing cage, etching or pitting on roller
an assembly (b above).
surfaces, and any evidence of wear. Replace if worn or
damaged.
hub or the axle spindle.
(c) Pack bearings from large end of cone
NOTE
cavities between rollers and cage are filled. Cover
bearings with a clean, lint-free rag until time to install.
If no seal puller is available, drive bearing
cone and seal out using a brass drift and
(d) Inspect bearing cups in hub for pits,
hammer from the outer side of the hub.
grooves, or flaking. If damaged, use a puller to remove.
Drive in new bearing cups with a suitable driver.
(c) Remove inner seal with a seal puller and
(e) Inspect hub cap for damage to flange
then remove inner wheel bearing cone.
that would allow water to leak into wheel bearings.
Replace if damaged.
(2) Inspection and Repair.
(f) Replace hub cap gasket.
WARNING
(g) Cheek threads of studs, screws, and nuts
for damage.
Dry cleaning solvent P-D-680 Is toxic and
flammable.
Always wear protective
(h) Inspect brake drum for pitting or
goggles and gloves, and use only In a well-
scoring. Inspect hub bearing surface for damage. If brake
ventilated area. Avoid contact with skin,
drum is damaged, notify direct support maintenance for
eyes, and clothes, and DO NOT breathe va-
repair.
pors. DO NOT use near open flame or ex-
cessive heat. The solvent's flash point is
100F-138F (38C-59C). If you be-
come dizzy while using cleaning solvent,
(a) Ensure that the axle spindle is
Immediately get fresh air and medical help.
thoroughly clean.
If solvent contacts eyes, Immediately wash
your eyes with water and get medical aid.
(b) Install inner seal and wiper using seal
replacer.
Compressed air used for drying or clean-
ing purposes must not exceed 30 psi
(c) With tire, wheel, hub. and brake drum
(207 kPa). Wear protective clothing
assembly in upright position, install inner wheel bearing.
(goggles and gloves) and use caution to
avoid injury to personnel.
(d) Install tire, wheel, hub, and brake drum
assembly (d below).
d.
Installation and Adjustment of Tires, Wheels, Hub,
CAUTION
and Drum as an Assembly (M967, M969, and M970 except
M970 SN TC-0843, TC-0844, and TC-103 thru TC-178).
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
cleaning. Dry cleaning solvent will
hub/spindle misalinement when installing
deteriorate the tires.
hub to 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 brake
(u) Thoroughly clean all parts with dry
cleaning solvent (item 11. Appendix E) and a stiff fiber
shoes when partially installed, turn both adjusting bolt
brush. Ensure that parts are completely dry. Use low
hubs fully onto spindle.
pressure compressed air to dry parts, if available.
Change 3