Westerbeke 20B TWO Installationshandbuch Seite 53

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Seitenansicht 52
JS
AND
BW
TRANSMISSION
DESCRIPTION
The transmission's gear ratio is 2.47 to
1.
This manual
transmission turns a righthand propeller when engaged in for-
ward. The JS/BW transmits its power with case-hardened
helical gears and, in reverse, an intermediate gear. The
reversing process is carried out by a servo double disc system.
For
safety reasons, the transmission is
NOT
filled with lubri-
cating for shipment. Before leaving the factory, each transmis-
sion is thoroughly tested with oil in the transmission. This
testing, among other things, provides all internal parts with a
coating
of
oil. This oil acts as a preservative, providing reli-
able protection against corrosion for at least one year
if
the
transmission is properly stored.
The transmission is an immersion-lubricated type. Fill the
transmission up to
or
near the top
of
the machined notch cut
on
the dipstick with SAE 20W or SAE 30W engine oil
exclusively. Multigrade oils are not to be used in this
transmission.
DO
NOT
mix grades
of
oil! Lubricating oils
may have an API specification
of
CF,
CG-4, CH-4
OR
CI-4.
LUBRICATION
The oil capacity for the transmission is approximately 1.0
quart (1.0 liter). Check the oil level daily after the engine has
been warmed and stopped. The oil level should be maintained
at the top
of
the machined flat on the dipstick when the
dipstick is completely inserted into the transmission housing.
Make sure that the two
0-ring
gaskets on the dipstick are in
good shape. These
0-rings
will keep the dipstick in place.
Change the transmission oil after the first 25 hours
of
engine
operation and thereafter every
250 hours (or once per year,
minimum). There is a 6
mm
Allen Hex wrench 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 oil. This oil may
also be removed by attaching a pump onto the dipstick tube
so the oil may be sucked out. The operating oil temperature
must not exceed
250°F (120° C).
CONTROLS
The only controls required to operate the transmission is a
single level remote controlled cable. The cable should
be
attached to the gear box lever using the cable bracket supplied
with the unit. Both the gear box lever and the remote control
lever must
be
in the
NEUTRAL
position when the cable is
attached to the gear box lever. This allows the remote cable
an equal throw distance to shift the gear box into
FORWARD
or into
REVERSE
from the
NEUTRAL
position without running out
of
cable. Allow approximately
1
112
inches
of
cable throw from the
NEUTRAL
position on
the transmission's gear
box
lever to each
of
the two drive
positions.
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
transmission may over heat and eventually fail.
Exce.ssive throw distance in the remote control level
is
not
detrimental to the transmission. Note that the position
of
the
remote control lever should align with the
NEUTRAL
mark-
ing on its bracket when the transmission is really
in
NEUTRAL.
GEAR
BOX
SHIFT
LEVER
\
\
NEUTRAL
SHIFTING
To shift the transmission fron
NEUTRAL
into FORWARD,
exert a heavy push
to
the remote control lever. A gentle throw
may not carry enough force
to
actually shift the transmis-
sion's internal gears. A gentle throw is signalled by the trans-
mission not engaging into the desired drive. Make sure the
remote control lever is lubricated at least once each operating
season. Shift the transmission while the engine is running at
1200 rpm or below.
A
CAUTION:
NEVER
remove
or
loosen
the
two-bolt
gear
box
lever
cover
from
transmission.
The
position
of
this
plate
and
the
actuating
level
inside
of
the
transmission
has
been
finely
adJusted
at
the
factory
to
ensure
equal
throw
distance
,.finternal
mechanisms.
Loosening
of
this
cover's
capscrews
voids
the
transmission
warranty.
/"''IY'IWESTERBEKE
f
Enaines
& Generators
45
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