JS
AND
BW
TRANSMISSION
DESCRIPTION
The
transmission's gear ratio
is
2.47
to
I.
This manual trans-
mission
rotates opposite
to
the
engine
when
in
forward
gear.
The
JS
transmits
its
power
with
case-hardenedheli,al
gears
and,
in
reverse,
an
intennediate
gear.
The
revei.'~i.ng·piocess
IS
cllITied
out
by
a
servo
double
disc
system. For safety
reasons,
the
transmission
is
NOT
filled
with
lubricating
for
shipment.
Before
leaving
the
factory,
each
transmission
is
th9roughiy
tested
with
oil
in
the
transmission.
This
testing, arnol)go)her
things,
provides
all
internal
parts
with a coating of
oil.
This
oil
acts
as
a preservative, providing reliable protection
agains~
corrosion
for
at
h~ast
one
year
if
the
transmission
is
properly
stored.
The
JStransmission
is
an
immersion-lubricated
type.
Fiil
the
transmission up
to
or
near
the
top
of
the
machined notch cut
on
the
dipstick with
SAE
.20
W/20 or SAE30 weight engine
'oil
exclusively.
Multigrade oils
are
not
tobeused
iIi
this
transmission.
DO
NOT
mix
grades
of
oil!
Lubricating
oils
may
have
an
API
specification of CF
or
CG-4.· .
LUBRICATION
If
the
throw distance
(or
travel) of
the
remote
cable
is
too
short,
.the
gear
box
lever cannot
fully
engage
the transmission
into
.FORWARD
or
REVERSE.
In
this'
situation, the trans-
mission's internal clutches will wear prematurely
and
the
transntission
may
over
heat and eventually fail.
Excessive
throw
distance
in
the
remote
control level
is
not
detrhnental
to
the transmission. Note that
the
position of
the
remote
control lever should align with
the
NEUTRAL
mark-
ing.on
its
bracket
wheil
the
transmission
is
really
in
NEUTRAL.
.
GEAR
BOX
SHIFT
LEVER
The
oil
capacity
for
the
JS
transmission is approximately
1.0
quart
(1.0
liter).
Check
the
oil
level
daily after
the
engihehas
been
warmed
and stopped.
The
oil
level should
be
roBin-
tained
at
the
top of
the
machined /lat
on
the dipstick
when
:::,-
::::I··
..
!l'l-
O====¥.t=-;:::=~
the
dipstick
is
completely
inserted
into
thetransmissibil.
hous-
.f,
..
".
~
. .
I
ing.
Make sure that
the
two
a-ring gaskets
on
the
dipstick
-'
are
in
good shape.
These
a-rings will keep
the:dip~tic"ic
in
I
\
.
\I'z:'~.-~\
.
place.
. .
~EVER;E
1112"
~
•
-~
'FORWARD
.1
Change
the
transmission oil after the fhst
25
hours
of engine
operation
and
thereafter every
250
hours lor
once
per
year,
minimum).
The
JS
has
a 6
mm
Allen Hex
wnmch
drain plug
for
draining
the
oil.
To
make sure most
of
the
oil
will
drain
from
the
transmission,
run
the
engine
in
NEUTRAL
for
approximately
10
to
15
minutes
to
warm
9i!..ThlS
ollmay
also be removed by insertirig a pumps tube into the opening
for·the dipstick and extend it to the bottom
of
the case and
then pump out the oil.
CONTROtS
The
only
controls required
to
operate
the
transmission
is
a
single
level
remote controled cable. The cable should
be
attached
to
the
gear
box
lever using
the
cabi" bracket
sup-
plied with the unit Both
the
gear
b~x
lever
aDd
the remote
control lever mllst
be
in
the NEUTRAL position
when
the
cable-
is
attached
to
the
gear box lever. This allows
the
remot,
cable
an
equal
throwdistanc.e to shift the gellfbox
into
FORWARD
or
into
REVERSE from the
NEUTRAL
posi-
tion
without running
out
of cable. Allow approximately I
112
inches
of cable
throw
from
the
NEUTRAL position on
tp.e
transmission's
gear
box
lever
to
each
o(the
hvo
drive
positions.
..
. .
NEUTRAL
SHiftiNG·
Toshiftthe-transmissiOllfron NE(jTRAL
into
FORWARD,
exert'a heavy push
to.
the
remote control
lever.
A.gentle throw
may
nbt
carry
enough
force
to actually
shift·
the
transmis-
sion's internal
gears;
A
gentle
throw
is
signalled by the trans-
mission
not
engaging
.into
thi
desired
drive.
Make sure
the
rembte·control.Jeveris
lubri.cated
at.\east
once
each operating
season
•.
Shift the transmission while the engine is running at
l200tpm or below.
A
CAUTION:
NEVER
remove
Dr
loosen
the
two-bolt
gearbox/ever
cover
from
transmission.
The
position
of
this
plate:andtheactuating
level
Inside
of
the
transmission
has
been
finely
adjustedatthe
factory.to
ensure
equal
throw
distance
of-internal
mellhanisms.
Loosenliig.ofthls
cover's
capscrews
voids
the
transmission
warranty.
Engines & Generators
44
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