TM 9-2330-356-14
NOTE
WARNING
If no seal puller is available, drive bearing
cone and seal out using a brass drift and
The fall-safe chamber power spring must be
hammer from the outer side of the hub.
manually compressed and the air reservoirs
must be vented of pressure before removal of
hub and drum assembly.
and remove inner wheel bearing cone.
(2) Manually compress fail-safe chamber power
(2) Inspection and Repair.
spring (para 2-4).
WARNING
(3) Release air pressure by opening drain valves
on both air reservoirs (fig. 4-79).
Dry cleaning solvent P-D-680 is toxic and
Always wear protective
flammable.
(4) Jack up axle until tires are clear of ground.
goggles and gloves, and use only In a
Support axle with jack stand or blocking.
well-ventilated area. Avoid contact with
skin, eyes, and clothes, and DO NOT
breathe vapors. DO NOT use near open
(5) Remove six bolts and lockwashers (fig. 4-88)
flame or excessive heat. The solvent's
securing hub cap to hub. Remove hub cap and hub cap
flash point is 100F-138F (38C-59C).
gasket. Discard gasket.
If you become dizzy while using cleaning
solvent, immediately get fresh air end
(6) Remove outer wheel bearing nut (fig. 4-88),
medical help. if solvent contacts eyes,
wheel bearing washer, lock ring, and inner wheel bearing
Immediately wash your a yes with water
nut.
and get medical aid.
Compressed air used for drying or
(7) Remove outer wheel bearing cone.
cleaning purposes must not exceed 30 psi
(207 kPa). Wear protective clothing
(goggles and gloves) and use caution to
NOTE
avoid injury to personnel.
If wheel lift jack Is not available, follow steps
(8) through (10).
CAUTION
Do not clean parts with gasoline, in a hot
(8) Apply grease (item 17, Appendix E) to a
solution tank, or with water end alkaline
45x 20-inch 10 gage steel plate (table 4-1), laying a grease
solutions. Separate wheels and hub before
track approximately 10-inches wide the length of the
cleaning. Dry cleaning solvent will
plate.
deteriorate the tires.
Do not spin bearings with compressed air.
(9) Place the grease plate, with greased side up,
under the tires. Lower tires so that they are just resting on
the grease plate, with the majority of the vehicle weight
(a) Thoroughly clean all parts with dry
still on the jack.
cleaning solvent (item 11, Appendix E) and a stiff fiber
brush. Ensure that parts are completely dry. Use low
pressure compressed air to dry parts, if available.
(10) Slide tires, wheels, hub, and brake drum off of
axle spindle.
NOTE
f. Replacement of Wheel Bearings (M967A1, M969A1,
If wheel bearings need replacing, bearing
and M970A1 including M970 SN TC-0843, TC-0844, and TC-
cups must also be replaced (Step (d)).
103 thru TC-178) (Fig. 4-88).
(1) Removal.
(b) Inspect wheel bearings for cracks or
breaks in bearing cage, etching or pitting on roller
(a) Remove tires, wheels, hub, and drum as
surfaces, and any evidence of wear. Replace if worn or
an assembly (e above).
damaged.
Change 3
