ALLIS-CHALMERS
Paragraphs 311-312
23 20
fig.
AC149B—Mocfe/s B, ond C accessoiy unifs fbeft
p%i\\%Yt
power fake-off, and hydraulic lift pvmp) housing, which is attached to the
rear face of the transmission housing,
20.
PTO shaft 33. Oil seal 41. Detent ball
21.
Belt pulley shaft 35. Snap ting 42. Detent spring
22.
Shims . 36. Pulley shaft b«vel srear 43. Seal
23.
Accessory units driven
&
37. Snap ring 44. Shift finger
belt pulley drive gear 38. Belt pulley 45. Adjusting nut
30.
Bearing retainer 39. Snap ring 46. Pulley shaft nut
31.
Snap ring 40. Washer 47. Shift finger screw
MS.
Transmission mainshaft
15.
Accessory unite drive gear
shift lever
16.
Accessory units drive gear
16.
Snap ring
18.
Snap ring
19.
Shims
which are stamped "THRUST" on
outer race so that the mark is fac-
ing away from gear.
The one-piece belt pulley tube cork
seal (11), which is located between
clutch housing and inside of right
main frame rail and used to prevent
lubricant from leaking past the belt
pulley tube, can be renewed in the
following manner: Loosen right frame
rail bolts and remove oil seal. Cut
the new cork seal diagonally and
shellac same into position with diag-
onal joint placed on top.
To renew the pulley unit drive gear
(3—Fig. AC84) requires removal of
clutch shaft as outlined in paragraph
192.
COMBINED PULLEY & PTO
Models
B-C-CA
On these models, the pto is combined
not only with the belt pulley, but also
with the pump of the hydraulic sys-
tem.
These three accessory units are
all contained within or attached to a
common housing, Fig, AC149A, desig-
nated by Allis-Chalmers as the pto
housing. There are detailed differences
in the construction of the CA as com-
pared to models B and C, Fig, AC149B,
including the use of four cams on the
CA for the hydraulic pump instead of
two,
and a separate set of shims on
the CA for controlling the position of
the bevel gear on the pto shaft. This
separate set of shims is the only item
affecting the repair procedures and
can be overlooked generally, except
in those cases where the pto bevel
shaft gear or the pto housing is being
renewed.
Except that the bearings of the pto
shaft can be adjusted and the belt pul-
ley shaft oil seal renewed with the pto
housing in place, all repair work on
either the pto shaft or the belt pulley
shaft necessitates the removal of the
housing from, the rear face of the
transmission,
311.
R&R PTO HOUSING. To re-
move the pto housing, Fig. AC
150,
from rear of transmission, drain the
housing or jack up rear end of tractor.
Loosen drawbar rockshaft and discon-
nect hydraulic valve control unit from
pump. Remove belt pulley. Disconnect
pump to drawbar linkage. Remove
control quadrant from platform; also
tractor seat spring and shock absorber
unit. Loosen drawbar hanger bolts
from rear lower face of transmission
to provide removal clearance for hous-
ing. Remove cap screws and nuts
which retain housing to transmission
and lift housing unit off tractor.
When reinstalling the housing make
sure that the housing to transmission
case gasket is partially blanked off to
form a dam as shown at (G—Fig.
AC151.)
312.
OVERHAUL. To disassemble
the removed unit, first remove the hy-
draulic pump unit from the case. Re-
move the bearing retainer and shims
from rear face of housing. Using a
puller with jaws of same engaged
against rear face of spur gear on pto
shaft as shown in Fig. AC 153 press the
pto shaft out of the gear. The front
Pto and Belt
Pulley Unit
fig. ACt so—Model CA accessory units Insfa/lafion—right rear
view.
85
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