POWER
"fRAIN
-
Quick
Change
EL433B,
SW433C, GP433B, EW433C
3-2-2
Construction
Shifting
from
high
to
l
ow
or vice
ve
rsa
is
made
by
operating
the change knob on the
top
of
the change housing.
Operating
the
change knob makes the
shift
fork
guide bar
to
move sideways. As s
hown
in Fig. 3-13, the
shift
fork
guide bar
has
thr
ee
not
ches
determining the positions
of
high (notch on the
left)
, neutral (notch
at
the
ce
nter) and
low
(notch on the right), and
it
is
held in position
by
the
shift
pin
forced
by
a spri
ng
. As the
sh
i
ft
fork
guide bar
moves, the s
hift
fork
attached
to
the
shift
guide bar mov
es
sideways the dog
cl
ut
ch splined
to
the secondary shaft.
As
the change knob
is
shifted
to
''
High,"
the dog c
lu
tc
h
meshes
with
the drive chain sprocket. On the contra
ry
,
when the change knob
is
in
''
L
ow,"
the dog
cl
ut
ch
meshes
with
gear
1.
-
(
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M
J
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fll
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-
1\-1.
«1
)D
-
Dog
1LI
al
~
,
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Drive
Chain
Sprocket
-
..
.
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-
-
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r
II
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-
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3-2-3
Power Transmission
A. High Position (In
case
of
SW433C)
When the change
knob
is in
''High,"
engine
power
is carried
to
the dog clutch splined
to
the secondary shaft, and then
the dog clutch
causes
the drive chain sprocket (which
meshes
with
the dog clutch)
to
turn. That is,
the
engine
speed
is
not
reduced
by
the
quick
change
but
is reduced
as
a gear ratio
of
25:
14
from
drive chain sprocket (14 teeth)
to
track drive axle driven sprocket (25 teeth).
' ,
I I
.
...
~,
~-
......;;
l I
il;
111
"
. .
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..
•
.
j
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J
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r
'r
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l
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-,
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-
......
\..
'-.
....
r
-
"
(
)~
..
I
'-..
r-{
:m:
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--
~
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a
·-
--
-
~
-
-
L.
-
fl.
,
-
,
..t:"
-
..
\.._
[11
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Fig. 3-13
•
-57-
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