Paragraphs 180-186
ALLIS-CHALMERS
plate
(7) and
driven discs
(9)
moved
forward, check
the
clearance between
the pressure plate
(11)
surface
and
rear face
of
driven disc. Desired
clearance
of
0.030
is
obtained
by
adding
or
removing shims
(1)
from
the three adjusting points.
180,
OVERHAUL. To remove clutch,
proceed
as
follows: Drain torque tube
housing. Disconnect clutch pedal,
brake rods
and
tail light wire. Remove
battery, battery carrier, transmission
clutch housing (torque tube)
top
cover
and power take-off shaft. Remove
steering post-to-transmission housing
retaining
cap
screws. Disconnect both
hydraulic lift rams. Engage transmis-
sion clutch
to
facilitate
its
removal
through
top
opening
in
torque tube.
Block
up and
support tractor under
rear portion
of
main frame. Support
torque tube
and
transmission housing
separately. Remove torque tube-to-
transmission housing retaining bolts
and roll transmission assembly away
from tractor. Working through opening
in top
of
torque tube, remove four nuts
attaching transmission clutch front
plate (8—Fig, AC79)
to
flanged power
take-off drive gear (5—Fig. AC84).
Lift transmission clutch
out
through
top.
Reassemble
the
clutch unit
so
that
the long
hub of
forward disc faces
the
engine
and the
long
hub of the
rear
disc faces
the
transmission.
The Belleville type spring washer
(2—Fig. AC79) should
be
installed
with
its
small diameter facing
for-
ward.
The bi-metallic friction facings
are
integral with
the
driven plates,
and
are sold only
as a
plate assembly. They
should
be
renewed when worn
to the
point where
the
grooves
are
oblit-
erated,
181.
CLUTCH SHAFT.
For
repair
information
on
transmission clutch
shaft (7—Fig. AC83
or
AC104) refer
to
paragraph
233.
15
Fig, 4C79->Mocfef
WD
transmission clutch assembly
is an
overcenter type. Disc wmar
is
compensated
for by
removal
of
shims
(1).
Model WD4S
is
similar.
1,
Shims
2,
Belville washer
3,
Link pin
4,
Release lever roller
5,
Pivot pin
6. Rear plate spring
7.
Center plate
8, Front plate
9, Driven disc
11.
Pressure plate
12.
Release lever
13.
Lever link
14.
Belville retainer
15.
Rear plate
16.
Snap ring
TORQUE TUBE
Models
B-C-CA
185,
To
remove torque tube (clutch
housing),
Fig,
AC80, from tractor,
first place supports under torque tube
and under
the
engine. Remove hood,
starting motor,
air
cleaner,
and
fuel
tank strap. Disconnect steering drag
link, radius
rod on
axle models,
and
wiring harness
at
cutout relay, igni-
tion unit, and head lights. Remove nuts
from four bolts which retain torque
tube
to
engine.
185A.
On B and C,
unbolt front
end
of each wheel guard from crosswise
support
and
disconnect brake linkage.
On
CA,
remove wheel guards
and
wheel guard supports
and
disconnect
brake linkage.
On
all
models, disconnect tail light
wire
and
remove nuts from studs
which retain torque tube
to
transmis-
sion. Move transmission back
far
enough
to
permit removing
the
cotter
pin
or
straight
pin
which retains
uni-
versal joint
to the
transmission shaft.
After extracting
the pin, the
torque
tube with steering gear panel
box and
other parts
can be
moved away from
the tractor.
If
the
torque tube
is to be
renewed,
remove
the
steering gear, battery,
metal shroud,
and
tool
box.
Remove
clutch shaft, clutch shifter fork, brake
pedal pivot shaft,
and
other parts.
Models RC-WC-WF (Without
Traction Release Coupling)
186.
To
remove torque tube, support
rear
of
tractor frame
and
detach rear
axle housing from
end of
each frame
side rail.
(On WF
model, remove also
the platform
and
steering gear.)
Re-
move steering support brace
and
roll
m:>^
^
fig, AC79A-'Model
WD
transmission
clutch shifter
&
bush-
ing, fork
and
linkage, which
are
located
in
rear portion
of torque tube. Model WD4S
is
similar,
U Shifter bushinss 6, Shifter shaft
2.
Shifter & bushings 7, Yoke pin
3.
Fork 8. Link yoke
4.
Set screw 9, Lever link
6.
Oil
seal
10, Shifter collar
Fig,
AC80—Model
CA torque tube installation. Models B,
and C are
similar.
52
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