Paragraphs 255-266
ALLIS-CHALMERS
31
32
10
37
fig, ACllS-Model 0 final drive and brake
assembly.
Shims (9) control
bull pinion shaft bearings
adjustment.
Shims (16) control wheel axle
shaft bearings
adjustment.
Model C is similar except for cfiffarences
in wheel oxie shaft construction; refer to fig,
AC
116.
K. Brake drum key
4.
Oil Seal
5.
Snap ring
7.
Bull pinion & shaft
9.
Shims
10.
Bearing retainer
12;
Final drive housing
13.
Bearing cap
14.
Bearing cap screw
15.
Bearing washer
16.
Shims
18.
Snap rins
20.
Bull (ring) gear
22.
Snap ring
24.
Oil seal
25.
Wheel axle
27.
Housing pan
80.
Brake pin retainer
31.
Brake lever
32.
Brake toggle
33.
Brake toggle pin
34.
Brake fulcrum pin
35.
Set screw
36.
Brake drum
37.
Brakeband
38.
Gear retaining nut
39.
Rear wheel
40.
Pinion shaft plug
41.
Adjusting nut
42.
Brake band spring
Model
G
255.
PINION BEARINGS ADJUST-
MENT.
To
adjust
the
pinion shaft
bearings, first separate the main frame
from the front
of
the transmission case
as described
in
paragraph 217. Unstake
nut (14—Fig. AC96)
and
turn same
until
a
slight preload
of
about
6
inch
pounds
is
obtained; then res take
the
nut.
255A. CARRIER BEARING
AD-
JUSTMENT.
To
adjust
the
carrier
bearings and the backlash
of
the bevel
gears,
follow
the
procedure outlined
in paragraph 242,
255B.
PINION
&
RING GEAR
RE-
NEWAL,
To
renew
the
pinion
and to
remove
the
differential
and
ring gear,
follow
the
procedure given
in
para-
graph 222. To overhaul
the
differential
on the bench or
to
renew the ring gear
follow
the
procedure given
in
para-
graph 241A
or 244.
Model
RC
256.
PINION BEARINGS ADJUST-
MENT.
To
adjust
the
pinion shaft
bearings,
it is
necessary
to
first detach
rear axle housing from the end
of
each
frame side rail
by
removing bolts (B—
Fig. AClll). Next, remove
cap
screws
(Z—Fig. AC82) retaining torque tube
to differential carrier and slide torque
tube forward
far
enough
to
permit ro-
tation
of
nuts
(12) and (13).
Adjust
nuts
(12) and (13)
until pinion shaft
rotates freely without end play.
256A. CARRIER BEARINGS
AD-
JUSTMENT. To adjust carrier bearings
and backlash
of
gears, proceed
as out-
lined
in
paragraphs 245
and
245A.
256B.
PINION
&
RING GEAR
RE-
NEWAL. Paragraphs
246,
246A,
and
246B give
the
procedure
for
installing
a
new
ring gear
and
overhauling
the
differential. However
in
removing
the
ring gear and differential unit on mod-
els with steel rear axle housings,
you
should deviate from
the
procedure
in
paragraph
246 by
removing
the
final
drives
as
complete units instead
of
removing
the
bull pinion shafts. After
the differential unit
is
removed
a new
bevel drive pinion
can be
installed
by
detaching
the
torque tube from
the
differential carrier
by
removing nuts
(Z—Fig. AC82). Withdraw pinion cage
from differential carrier
and
install
the new drive pinion.
Models WC-WF
257.
PINION BEARINGS ADJUST-
MENT.
To
adjust
the
pinion shaft
bearings follow
the
procedure given
in paragraph
256.
257A. CARRIER BEARINGS
AD-
JUSTMENT.
To
adjust carrier bear-
ings
and
backlash
of
gears
on
models
with malleable iron rear axle housings,
proceed
as
outlined
in
paragraphs
245
and 245A. On models having steel rear
axle housings, follow
the
procedure
as
outlined
in
paragraph 248.
257B.
PINION
&
RING GEAR
RE-
NEWAL.
To
renew
the
pinion
and
bevel ring gear follow
the
procedure
given
in
paragraph 256B.
Models WD-WD45
258.
PINION BEARINGS ADJUST-
MENT.
To
adjust
the
pinion shaft
bearings, follow
the
procedure
out-
lined
in
paragraph 234
or
239B. These
procedures call
for
removal
of the
pinion shaft unless
a
special wrench
is available.
258A. CARRIER BEARINGS
AD-
JUSTMENT.
To
adjust carrier bear-
ings and backlash
of
gears, first remove
both final drive units
as
outlined
in
paragraph
283.
Then proceed
as out-
lined
for
models B, C, and CA
in
para-
graph 240A,
to
backlash limits
of
.005-.014.
258B.
PINION
&
RING GEAR
RE-
NEWAL. Paragraph 234
or
239B gives
the procedure
for
installing
a new
bevel pinion,
and for
removing
the
ring gear
and
differential unit from
the tractor. Paragraph
252
gives
the
bench procedure
for
installing
a new
ring gear. Paragraph 240A gives
the
procedure
for
adjusting
the
carrier
bearings
and
bevel gear backlash.
FINAL DRIVE UNITS
Models
B-C
265.
ADJUST WHEEL AXLE
SHAFT BEARINGS. Support tractor
and remove cap (13—Fig. AC115) from
inner side
of
final drive housing
(12).
Remove inner bearing retaining
cap
screw (14), washer (15),
and
vary
the
number
of
shims
(16) to
eliminate
all
bearing play
but
without binding
shaft. Removing shims reduces bearing
play.
266.
RENEW WHEEL AXLE BEAR-
INGS,
OR BULL GEAR. Support
cen-
ter
of
tractor
and
remove wheel.
The
oil seal
(24) on
model
B can now be
74
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