Paragraphs 23-27
ALLIS-CHALMERS
Fig. ACl8—Ross steering gear installation
on models
B, C, and
CA. Wormshaff bear-
ings adjustment
can be
made after
re-
moving
the
fuel
tank.
76.
Housing
78.
Shims & gaskets
80.
Housing cover
82.
Jacket tube
86.
Adjusting screw
87.
Locknut
108.
Tube clamp bolt
Fig. AC 7 9—Ross sfeering gear Insfallaflon
on model
G
tractor.
78.
Shims & gaskets
80.
Housing cover
81.
Tube clamp
82.
Jacket tube
86.
Adjusting screw
99.
Side cover
108.
Tube clamp bolt
109.
Housing cover
cap screws
(worm) bearings, remove steering
wheel, loosen column jacket tube
clamp Figs. AC17, AC18, AC19
and AC
20,
and
support clamp; then slide
tube
(82) up
column. Remove
cap
screws retaining housing upper cover
(80)
to
housing
(on B, C, and CA,
work through tool
box
opening
to re*
move
two
lower
cap
screws). Remove
shims
(78)
until shaft
has
zero
end
play,
but
rotates freely.
23.
STUD (LEVER SHAFT) MESH.
On B,
C, and
CA,
it is
advisable
to re-
move
the
starting motor before
at-
tempting this adjustment. Locate
mid-
position
of
steering gear
by
turning
steering wheel from
one
extreme posi-
tion
to the
other, then back half-way.
With gear
in
mid-position, loosen lock-
nut (87—Fig. AC18
or
AC20)
and
turn
adjusting screw
(86)
clockwise until
end play
in
lever shaft (cross shaft)
is
78
77
97
Fig.
AC70—ROSS
steering gear assembly
as
used
on
later production model
WF
fracfor.
76.
Expansion plug
77.
Worm & shaft
78.
Shims & gaskets
80.
Housing cover
81.
Tube clamp
82.
Jacket tube
83.
Bushing
86.
Sector & shaft
86.
Adjusting screw
87.
Locknut
89.
Bushings
90.
Steering arm
96.
Oil seal
97.
Snap ring
99.
Side cover
barely perceptible.
Be
sure housing
cover
cap
screws
are all
tight when
making this adjustment. Shaft should
have
an
increased amount
of end
play
when gear
is
moved either
way off
the
mid- or
high point. Steering
arm
should
be
positioned
on
lever shaft
so that steering gear
is in
mid-position
when wheels
are
straight ahead.
On model
G,
steering wheel should
be positioned
on
lever shaft splines
in
such manner that with front wheels
pointing straight ahead,
the
cutaway
section
of
steering wheel
is
located
between
the
12
and 4
o'clock positions.
24.
OVERHAUL.
On
models
B, C,
and
CA,
removal
of the
gear unit
re-
quires removal
of
fuel tank, starting
motor
and its
linkage, negative
bat-
tery cable, steering wheel
and
shroud
retaining bolts. After unbolting from
torque tube, withdraw unit forward
until
it is
free from shroud.
The
inner
races
for the
worm shaft ball bearings
are formed
by the
ground ends
of the
worm
or cam
itself.
The
lever shaft
is
supported
on two
renewable bushings,
which
are
pressed into
the
gear hous-
ing. When reinstalling
the
jacket tube
(82)
the
notch
at its
lower
end
should
be
up, to
prevent grease leakage.
Of
the
cap
screws retaining
the
column
shaft cover,
the
lower
one or
ones
re-
ceive
the
grease sealing copper wash-
ers;
the
other
cap
screws
are
provided
with lock washers.
RC-WC-WD-WD45
Steering gear
on
this model
is lo-
cated
in
front support. Refer
to
para-
graph
4 and 4A for
adjustment
and
repair data.
WF (Lavine Gear)
Before adjusting
the
gear, discon-
nect drag link
or
remove steering
arm
to remove load from gear
and
permit
locating mid-position.
26.
WORM SHAFT
END
PLAY.
To
reduce play
in
worm shaft bearings,
remove shims (78—Fig.
AC21)
from
between housing lower cover
(80) and
housing
(76). All end
play should
be
removed from worm gear
but
shaft
should
not
bind.
27.
GEAR MESH. Locate mid-posi-
tion
of
steering gear, with drag link
disconnected,
by
turning steering
wheel from
one
extreme position
to
the other, then back half
way.
With
gear
in
mid-position, loosen locknut
and turn adjusting screw
(86)
clock-
wise
to
reduce
end
play
in
trunnion
shaft
(8S). Be
sure housing cover
re-
taining
cap
screws
are
tight when
making this adjustment. When
end
play
in the
trunnion shaft
is
reduced,
drive
nut (107) is
meshed deeper into
worm gear
(77) and
backlash
is re-
12
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