TM-9-2330-356-14
SEMITRAILER, TANK: 5000 GALLON, BULK HAUL, SELF LOAD/UNLOAD M967 AND M967A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, AUTOMOTIVE M969 AND M969A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, UNDER/OVERWING AIRCRAFT M970 AND M970A1
TECHNICAL MANUAL; OPERATOR’S, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1990
TM-9-2330-356-14 - Page 242 of 528
TM 9-2330-356-14
WARNING
The fall-safe chamber power spring must be
manually compressed and the air reservoirs
must be vented of pressure before removal of
hub and drum assembly.
(2) Manually compress fail-safe chamber power
spring (para 2-4).
(3) Release air pressure by opening drain valves
on both air reservoirs (fig. 4-79).
(4) Jack up axle until tires are clear of ground.
Support axle with jack stand or blocking.
(5) Remove six bolts and lockwashers (fig. 4-88)
securing hub cap to hub. Remove hub cap and hub cap
gasket. Discard gasket.
(6) Remove outer wheel bearing nut (fig. 4-88),
wheel bearing washer, lock ring, and inner wheel bearing
nut.
(7) Remove outer wheel bearing cone.
NOTE
If wheel lift jack Is not available, follow steps
(8) through (10).
(8) Apply
grease
(item 17, Appendix E) to a
45x 20-inch 10 gage steel plate (table 4-1), laying a grease
track approximately 10-inches wide the length of the
plate.
(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
still on the jack.
(10) Slide tires, wheels, hub, and brake drum off of
axle spindle.
f. Replacement of Wheel Bearings (M967A1, M969A1,
and M970A1 including M970 SN TC-0843, TC-0844, and TC-
103 thru TC-178) (Fig. 4-88).
(1)
Removal.
(a)
Remove tires, wheels, hub, and drum as
an assembly (e above).
NOTE
If no seal puller is available, drive bearing
cone and seal out using a brass drift and
hammer from the outer side of the hub.
(b)
Remove seal (fig. 4-88) with a seal puller
and remove inner wheel bearing cone.
(2)
Inspection and Repair.
WARNING
Dry cleaning solvent P-D-680 is toxic and
flammable.
Always wear protective
goggles and gloves, and use only In a
well-ventilated area. Avoid contact with
skin, eyes, and clothes, and DO NOT
breathe vapors. DO NOT use near open
flame or excessive heat. The solvent’s
flash point is 100°F-138°F (38°C-59°C).
If you become dizzy while using cleaning
solvent, immediately get fresh air end
medical help. if solvent contacts eyes,
Immediately wash your a yes with water
and get medical aid.
Compressed air used for drying or
cleaning purposes must not exceed 30 psi
(207 kPa).
Wear protective clothing
(goggles and gloves) and use caution to
avoid injury to personnel.
CAUTION
Do not clean parts with gasoline, in a hot
solution tank, or with water end alkaline
solutions. Separate wheels and hub before
cleaning.
Dry cleaning solvent will
deteriorate the tires.
Do not spin bearings with compressed air.
(a)
Thoroughly clean all parts with dry
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.
NOTE
If wheel bearings need replacing, bearing
cups must also be replaced (Step
(d)).
(b)
Inspect wheel bearings for cracks or
breaks in bearing cage, etching or pitting on roller
surfaces, and any evidence of wear. Replace if worn or
damaged.
4-106
Change 3
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