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 gear housing. Using a drift. pin, tap out straight pins
(Z). Partially tap shaft out of gear housing and re-
move
stop
washer
(CC)
input
bevel
gear
(DD)
and
woodruff
key
(BB)
from
shaft.
Lift
input
bevel
gear
off
operating
screw
bevel
gear
(G).
Remove
shaft
from gear housing.
(3)
Remove
locknut
(F)
which
secures
operating
screw
bevel
gear
(G)
on
operating
screw.
Pull
operating
screw
bevel
gear
(G)
from
operating
screw
(GG).
Remove key (EE) from keyway in screw. Remove
cotter pin (FF) which secures gib plug (W) in boss
Remove
gib
plug
of
collar
at
bottom
of
upper
leg.
and
gib
(X).
(4)
Using
soft
metal
round
stock
and
hammer,
carefully
tap top end of operating screw (GG) until screw clears
bore of upper roller bearing (H) in housing and lower leg
(N) with assembled parts can be withdrawn from upper
leg. Lift upper roller bearing (H) out of bearing cup
Remove bearing cup from seat in
in gear housing.
gear
housing.
Remove
lower
roller
bearing
(K)
from
operating
screw
(GG).
Unscrew
operating
screw
until
its
entire
length
is
free
of
elevator
nut
(M)
in
lower
leg. Tap out two shoulder pins (L) which secure ele-
vator
nut
in
lower
leg.
Remove
nut
from
lower
leg.
Remove
two
pipe
plugs
(P)
from
lower
leg.
Remove
hex-head bolt (S), two plain washers (R), locknut (U),
and shoe pin (Q) which retain shoe (T) on lower leg.
Shoe will drop off leg. Remove lubrication fittings (V)
from upper leg tube collar and gear housing.
b. Cleaning. Wipe all parts clean. Where old lubricant has
hardened,
clear
with
mineral
spirits
paint
thinner
or
dry-cleaning
solvent. Clean bearings thoroughly.
Inspect all parts for wear, dis-
c. Inspection and Repair.
tortion, or cracks. With fine file, hand-chase threads at gear
end
of
operating
screw
if
necessary.
Check
hex
nut
retaining
drive bevel gear for damage and replace if necessary. Check
elevator nut internal threads for damage or wear, if worn,
Chase out thread if necessary. Check
replace elevator nut.
Inspect
operating screw for bend by rolling on flat surface.
roller
bearings
for
wear
and
replace
if
unserviceable.
Refer
to TM 37-265 for care and maintenance of bearings. Inspect
bearing cup for damage or. wear. If cup shows signs of wear,
replace. Inspect bevel gears and bevel gear shaft and replace
if worn or damaged.
File off any burs on operating screw.
threads.
Check
that
contact
surface
of
gib
is
smooth.
If
not,
TAGO 1321B
139
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