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 Inspect mounting stud holes for apparent wear due to loose
Check
split
retaining
mounting
and
replace
wheel
if
worn.
ring
for
wear
or
distortion
and
replace
if
wear
or
distortion
are
such
as
to
prevent
ring
from
holding
tire
effectively.
d.
Assembly.
Install
tire
on
wheel
Install
wheel
on
hub
52e).
83. Hubs and Brake Drums
a.
Disassembly. Remove hub and brake drum (F or M, fig.
Remove brake drum from hub
from axle (par. 53a).
(par. 53d and f).
Wash hub and drum assembly and bearings
b. Cleaning.
thoroughly
with
mineral
spirits
paint thinner or dry-cleaning
Refer to TM 37-265 for
solvent
and
allow
bearings
to
dry.
care and maintenance of bearings.
c. Inspection and Repair.
Note. The
key
letters
shown
in
parentheses
are
in
(1) H u b s . Inspect each hub (G) and adapter (C) care-
fully for cracks and other indications of damage. Re-
place
hub
or
adapter
if
damaged.
Inspect
(bearing)
cups (H) for cracks, chipped spots, or wear caused
by
contact
with
bearing rollers. Make sure cups fit
If cups are damaged or worn, replace
tightly in hub.
(par. 53h and i). Oil bearing cones and rollers lightly
Replace if
and
rotate
by
hand
to
test
for
tightness.
there is evidence of scoring, pitting, or wear. Inspect
oil seals to make sure contact material is intact and
Inspect threads on wheel studs (A) in hub
pliable.
and
in
bearing
nuts
and
wheel
cap
nuts;
replace
if
threads are stripped. Wheel studs have serrated shanks
To drive out, use soft
and are pressed into hub.
bar and hammer. To replace, mate serrations in bolt
with
serrations
in
hole
so
as
not
to
destroy
forma-
tions.
Inspect brake drums (J) for warp-
(2) B r a k e d r u m s .
age, cracks, or scored braking surface.
Place drum
in
lathe
and
check
run-out
of
braking
surface.
Run-
out must not exceed 0.007-inch total indicator reading.
Refinish surface on lathe if scored or if run-out ex-
If refinishing requires removal of
ceeds 0.007 inch.
more than 3/32 inch of metal (3/16 inch on diameter),
or if diameter of braking surface is greater than spe-
cified repair and rebuild standards (par. 111), replace
drum.
TAGO 1321B
117
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