Paragraphs 280-284
ALLIS-CHALMERS
19
20
Fig AC125--Models
WD and
WD45 final drive
and
rear axle unit. Shims
(T)
control bull pinion shaft
bearing adjustment. Shims
C15)
control wheel axle shaft bearing adiustment. Spacer
17) and
snap
ring
(11) are not
used
on WD
tractors after 32831
nor any
WD45 tractors.
1.
Shims
3.
Bull pinion & shaft
6.
Oil
seal,
outer
6.
Bull gear housing
7.
Spacer, inner bearing cup
10
Pinion shaft bushing (i
11.
Snap
ring,
inner bearing
12.
Oil seal
13.
Dust cap
14.
Washer & pin
15.
Shims
19.
Bull pinion shaft housing 27. Oil seal
10.
Pinion shaft bushing (in 16. Bearing
cone,
inner
differential
case)
.
g
18.
Snap ring
20.
Gasket
21.
Bull gear housing pan
22.
Gasket
23.
Bull gear
24.
Snap ring
26.
Bearing
cone,
outer
27.
Oil seal
28.
Wheel axle shaft
29.
Gear spacer
31.
Bearing retainer
32.
Snap ring
33.
Brake drum snap ring
34.
Brake drum
280.
RENEW WHEEL AXLE, BEAR-
INGS,
OR
BULL GEAR.
To
renew
either the wheel axle shaft (28), bull
gear (23) and/or wheel axle shaft oil
seal (27) or bearings (16 & 26), pro-
ceed as follows: Drain bull gear hous-
ing and remove housing pan, and rear
wheel and tire unit. Remove wheel
axle shaft bearing dust cap, cap screw,
washer (14) and shims (15). Working
through bull, gear housing opening re-
move bull gear positioning snap ring
(32).
Support bull gear and bump
wheel axle shaft out of bull gear and
housing.
The oil seal (27) (lip facing bull
gear) and/or bearings can be renewed
at this time. Long hub of gear should
face toward rear wheel. Adjust wheel
axle shaft bearings to a .002 preload
with shims (15) located on inner end
of shaft.
281.
ADJUST BULL PINION BEAR-
INGS.
Remove rear wheel and tire as
a unit. Adjust bull pinion shaft bear-
ings to provide zero end play and a
free rolling fit with shims (1), inter-
posed between bull gear housing (6)
and bull pinion bearing retainer (31).
282.
RENEW BULL PINION, BEAR-
INGS,
BRAKE DRUM.
To
renew eith-
er the bull pinion gear (integral with
shaft),
pinion bearings, oil seals, brake
drum and/or bull gear housing, pro-
ceed as follows: Remove brake shoas.
Support rear portion of tractor under
main frame and remove rear wheel
and fender. Supporting the final drive
assembly, remove the cap screws which
retain it to the transmission and with-'
draw the final drive assembly.
Brake drum can be renewed at this
time by using a suitable puller. Bull
pinion shaft housing (19) can be re-
newed at this time.
Remove brake drum Woodrujff key
and brake drum positioning snap ring.
Remove outer bearing retainer (31)
and shims (1). Then bump bull pinion
shaft on inner end and remove same
from housing.
Adjust bull pinion shaft bearings to
provide zero end play and a free-roll-
ing fit by means of shims (1).
283.
R&R
FINAL DRIVE UNIT.
Support rear portion of tractor at main
frame and remove rear wheel and
wheel guard. Remove brake shoes from
same side of tractor. Remove the cap
screws which retain final drive unit to
transmission case and withdraw the
unit from the tractor.
FINAL DRIVE CLUTCH
Model
CA
The final drive clutch. Fig. AC126,
controls power fiow to the rear wheels,
but permits the pto and hydraulic
pump and belt pulley to operate while
tractor is stationary. The single disc,
hand operated type clutch is located
on the bull pinion shaft of the right
hand final drive unit.
284.
ADJUSTMENT. Clutch requires
adjustment if it fails to disengage the
drive to rear wheels when actuating
lever is pulled to the rear. To adjust,
remove actuator hub retaining screw
(40—Fig. AC127) which is accessible
through opening in platform and final
drive housing. Rotate actuator hub
78
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