ALLIS-CHALMERS
Paragraphs 267-272
Fig, ACIM-Mocfel C details
of
final drive
wheel axle shaft
and
bull gear. Bearing
retainer (10) must have
oil
grooves when
used with
a
twelve tooth hull pinion,
24.
Wheel axle oil seal
25.
Wheel axle shaft
removed from
the
housing. Remove
pan
(27), cap (13),
inner bearing
re-
taining
cap
screw
(14),
washer
(15),
and shims (16). Back
off
gear retaining
nut
(38) as far as
possible
and,
using
a soft drift, drive axle towards wheel
side until gear retaining
nut can be
unscrewed completely. Withdraw axle
shaft
and
outer bearing cone through
wheel side
of
housing
and
bull gear
(20)
nut (38) and
washer from below.
Bearing cups
are
positioned
in
hous-
ing
by
snap rings. Inner bearing
cup
can
be
driven
out
with
a
driver
in-
serted from
the
wheel side
of the
hous-
ing
and the
outer bearing
cup
with
a
driver inserted from
the
inner side.
Reassembly
is
reverse
of
disassem-
bly. Select shims
(16)
between inner
bearing retaining washer
and
axle
shaft
to
remove
all
bearing play with-
out causing shaft
to
bind.
267.
ADJUST BULL PINION
SHAFT BEARINGS. Support tractor
and remove wheel. Remove brake
housing cover
to
permit checking bear-
ing play
by
prying against edge
of
brake drum (36—Fig. AC115). Remove
bearing retainer plate
(10)
from final
drive housing
(12).
Vary number
of
shims
(9) and
paper gaskets
to
elimi-
nate
all
bearing play,
but
without
binding shaft. Removing shims reduces
bearing play. Alternate shims with
paper gaskets
to
prevent
oil
leaks.
268. RENEW BULL PINION SHAFT,
BEARINGS
OR
BRAKE DRUM.
To
remove bull pinion shaft,
it is
neces-
sary
to
first remove final drive unit
as
outlined
in
paragraph
269.
268A. With final drive unit
off the
tractor, loosen
set
screw
(35) and,
with
the
aid of an
extended puller, pull
brake drum
(36)
from inner
end of
the shaft
and
remove brake drum
key
(K).
Remove bearing retainer
(10)
from final drive housing
(12) and
withdraw shaft
and
bearing cones from
outer
end of
housing. Bearing cones
can
be
pressed
off
shaft. Inner bearing
cup
is
positioned
in
final drive housing
by snap ring
(5) and can be
driven
out after removing
oil
seal
(4). Be
sure
to
renew
oil
seal
in
differential
carrier bearing housing,
if
splined
end
of shaft where
it
enters seal, shows
oil
leakage.
Reassembly
is
reverse
of
disassem-
bly. Select shims
(9) and
paper
gas-
kets between bearing retainer
and
housing
to
remove
all
bearing play
without causing shaft
to
bind. Alter-
nate shims with paper gaskets
to pre-
vent
oil
leaks.
269.
R&R ONE
FINAL DRIVE
UNIT.
Remove seat assembly
and fen-
der. Support center
of
tractor
and re-
move
cap
screws retaining final drive
housing
to
transmission
and
differen-
tial housing. Withdraw assembly,
be-
ing careful
not to
damage differential
carrier
oil
seal (3—Fig. AC106).
Model
CA
270.
ADJUST WHEEL AXLE
SHAFT BEARINGS. Follow same
pro-
cedure
as for
models
B and C as out-
lined
in
paragraph
265.
Refer
to Fig.
AC119.
271. RENEW WHEEL AXLE, BEAR-
INGS,
OR
BULL GEAR. Drain gear
housing
and
remove housing
pan. Re-
move rear wheel
and
tire
as a
unit.
Remove wheel axle shaft bearing dust
cap
(13), cap
screw
(14),
washer
(15),
and shims
(16).
Working from below,
remove bull gear positioning snap
ring
(19).
Support bull gear
and
bump
wheel axle shaft
out of
bull gear
and
housing.
Oil seal
(24) and
bearings
can be
renewed
at
this time.
Lip of oil
seal
should face towards bull gear. Adjust
wheel axle shaft bearings
to
zero
end
play,
or to a
barely perceptible (.002)
preload
by
varying
the
shims
(16) lo-
cated
at
inner
end of
shaft.
272. ADJUST BULL PINION SHAFT
BEARINGS. Follow same procedure
as
for models
B and C as
outlined
in
paragraph
267.
Fig,
AC117—Model
CA fractor—rear
Wew
showing
fhe
final drive
and
accessory units
installation. Accessory units include
the
power take-off (6T}, belt pulley
(&9},
and hy-
draulic lift pump (66).
12.
Final drive housing
47.
Final drive clutch
actuating lever
62.
Lift (rock) shaft
63.
Hydraulic lift
con-
trol quadrant
64.
Hydraulic lift hand
control lever
65.
Hydraulic
ram
67.
Power take-off shaft
68.
PTO
housing
69.
Belt pulley shaft
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