TM 9-2330-271-14&P
Section IX. MAINTENANC OF WHEELS, HUBS
AND BRAKIE DRUMS
NOTE
4-45.
Wheels
Use an arbor press or equivalent if it
Refer to paragraph 3-18 for removal and installation of
is necessary to remove and install
wheel.
ribbed neck bolts (19) or ribbed
shoulder bolts (14).
4-46.
Tires
(1) Remove nuts (21), washers (20) and ribbed
neck bolts (19) securing brake drum (12) to back front
Refer to TM 9-2610-200-20 for removal, servicing and
brake drive (13).
installation of tires.
(2) Remove back front brake drive (13) from
hub assembly (22) by removing ribbed shoulder bolts
4-47.
Hub and Brake Drum
(14) and separating back front brake drive from hub
assembly.
a.
General.
d. Cleaning and Inspection.
(1) Hub. Each hub is mounted on the axle
(1) Clean all parts thoroughly with approved
spindle on two tapered roller bearings.
cleaning solvent (paragraph 3-3b).
(2) Brake drum. Each brake drum is mounted
(2) Inspect hub carefully for cracks or other
on the hub. The brake drum is secured to the hub
indication of damage.
through a dished back front brake drive. A hub cap and
(3) Inspect inside diameter of brake drum for
hub cap gasket fastened to the outside of the hub
out-of-round or excessive scoring.
exclude moisture and foreign matter.
(4) Lightly oil rollers of tapered roller bearing
(3) Bearing.
There are two opposed,
and rotate by hand to test for tightness. Replace if there
adjustable, tapered roller bearings in each hub. The
is evidence of scarring, pitting, or excessive wear.
bearing cones with rollers are removable for cleaning,
(5) Inspect encased oil seal to make sure
inspection, or replacement. The cups are a press fit in
contact material is intact and pliable.
the hub.
(6) Inspect threads on wheel studs in hub, in
b. Removal of Hub and Brake Drum Assembly from
bearing adjusting nuts, and wheel cap nuts. Replace if
Axle (fig. 40).
threads are damaged.
(1) Remove screws (24) and lock washers (23)
e. Installation of Brake Drum on Hub (fig. 40).
securing hub cap (4) and hub cap gasket (5) to hub (22).
(1) Position hub (22) on back front brake drive
(2) Remove hub cap and gasket. Discard
(13) and secure with six ribbed shoulder bolts (14).
gasket if defective.
(2) Position brake drum (12) on back front
(3) Using a screwdriver, lift bent-over locking
brake drive (13) and secure with 18 ribbed neck bolts
lugs of key washer (7) to release outer bearing adjusting
(19), washers (20), and nuts (21).
nut (6).
f.
Installation of Hub and Brake Drum Assembly on
(4) Using wheel bearing adjusting wrench NSN
Axle (fig. 40).
5120-00-795-0059 (fig. 87), remove outer bearing
(1) Replace oil seal sleeve spacer (18) if it has
adjusting nut (6).
been removed.
(5) Slide off key washer (7).
(2) Press or carefully tap oil seal (11) into place
(6) Remove inner bearing adjusting nut (6)
using a block of wood. Do not hammer directly on seal.
using wheel bearing adjusting wrench.
(3) Pack inner tapered roller bearing (8) with
(7) Rock hub and brake drum assembly slightly
grease (figs. 3-1 and 3-2) and install on axle spindle,
on axle spindle to loosen outer tapered roller bearing (8).
adjacent to oil seal (11), with large outside diameter of
Remove bearing.
bearing toward oil seal. Tap bearing gently, if necessary,
(8) Pull hub and brake drum assembly from
with a brass drift or wood block.
axle.
(4) Slide hub and drum assembly on axle
(9) Remove oil seal (11) and inner tapered
spindle being careful not to damage seal (11).
roller bearing (8).
(5) Pack outer tapered roller bearing (8) with
(10) Do not remove oil seal sleeve spacer (18)
grease (figs. 3-1 and 3-2) and insert over spindle and
unless damaged or badly worn.
into hub. Install inner adjusting nut (6), but do not
c. Removal of Brake Drum from Hub (fig. 40).
tighten.
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