ALLIS-CHALMERS
Paragraphs 309-309A
4
3
Fig, AC 146—Model
G
belf pulley unit which
is
supplied
for
tractors equipped with
a
hydraulic lift system*
S. Shims 5. Bearing cup 10. Bevel pinion shaft
8. Pulley flange 6. Pulley sleeve 11. Snap ring ,
4.
Oil seal B. Oil retainer 17. Bearing cone
between bevel pinion
(10) and
gear
(12),
should
be
adjusted only after
it
is known that
the
bearings
are cor-
rectly adjusted,
as
outlined above.
Recommended backlash
is
.005
to
.0C7,
which
is
obtained
by
removing
a
shim
or shims
(7)
from ufider
one
bearing
cap
and
installing
the
same under
the
opposite bearing
cap.
309.
R&R AND
OVERHAUL.
To
remove belt pulley
and
housing unit,
unscrew
the
four
cap
screws which
re-
tain
It to the
clutch housing.
To disassemble
the
unit remove dust
cap from pinion shaft
and the
bearing
adjusting
nut (2).
Remove bevel gear
shaft bearing caps
(16),
move shaft
(13) away from pinion
(10) as far as
possible, then insert close fitting blocks
to fill
the
space between bevel gear
and case
on the
pinion side
of
gear.
Press shaft
(13)
from gear
and
remove
from case.
Th^
pinion shaft
can now
be pulled
or
bumped from
the
case.
When reassembling, install
the pin-
ion shaft first with
lip of oil
seal
for
same pointing towards
the
pinion.
Ad-
just pinion shaft bearings
as in
para-
graph 308A. When assembling
the
bevel gear shaft, press shaft
in
until
bevel gear
is
bottomed
on
shaft shoul-
der. Adjust bevel gear shaft bearings
and backlash
as in
paragraph 308A.
The paper gasket interposed
be-
tween
the
pulley unit housing
and
clutch housing
is .010
thick.
If
this
standard gasket does
not
provide
.004
to .007 backlash between helical drive
and driven gears,
use a
thinner gasket
or
an
additional gasket
as
required.
The driving gear which meshes with
the helical gear shown just behind
the
bevel gear
(12) is
located
in the
clutch
housing
and can be
removed
as out-
lined
in
paragraph 215.
Model
G
With Hydraulic Lift
309A. PULLEY
AND
SHAFT UNIT.
This unit, Fig. AC146,
can be
removed
from
the
larger housing
by
unscrew-
ing four
cap
screws.
The
gear
is in-
tegral with
the
shaft
(10) and is sup-
ported
on
tapered roller bearings
which should
be
adjusted
to
free
ro-
tation, zero
end
play,
by
tightening
the
nut
located under
the
dust
cap
at
the end of the
pulley flange
(3).
This adjustment
can be
made with
unit
in
place,
but
preferably when
it
is
off the
tractor.
Lip of oil
seal
(4)
should face toward
the
bevel gear.
After reinstalling unit
to
larger hous-
ing, check gear backlash which should
be within limits
of
.005-.010. Obtain
desired backlash
by
varying
the
shims
(S) located between fiange face
of
unit
and
face
of
larger housing.
1.
Bearing cover
2.
Gasket
3.
Shaft nut
4.
Ball bearing
5.
Shifter
6. Shifter pins
7.
Drive shaft
8. Roller bearing
9. Housing
10.
Shift arm
11.
Shift lug
12.
Snap ring
13.
Belt pulley bevel
drive gear
14.
Seal ring
16.
Hydraulic pump
intake tube
16.
Gasket
17.
Bushing
18.
Thrust wa«her
19.
Needle bearing
20.
Pump body
21.
Pump center plate
22.
Drive gear
23.
Gasket
26.
Pump gear (idler)
26.
Seal
27.
Shifter lever (to place
BP in operation)
28.
Detent spring
29.
Gasket
30.
Detent retainer
31.
Detent ball
32.
Needle bearing
33.
Pump gear (idler) shaft
34.
Pump gear (drive)
35.
Dowel pin
36.
Spring
37.
Plug
38.
Gasket
39.
Retainer
40.
Detent spring
41.
Valve lever
42.
Valve cover
43.
Spring
44.
Adjusting screw
45.
Oil seal
46.
Control valve
47.
Valve cover stud
48.
Ball seat
49.
Ball
51.
Detent ball
Fig,
ACf47-Model O hydraulic
UH
pump,
and
belt pulley drive unit which
is
mounted
on
leH
side
of
engine clutch housing. Cover (24;
is
used
on
housing (9) when tractor
is not
equipped
with
a
belt pulley unit*
16
83
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