Hurth Hsw Transmissions - Westerbeke 90A Four Service Manual

HURTH HSW TRANSMISSIONS
SHIPMENT
For safety reasons, the transmission is not filled with trans-
mission fluid during shipment and the selector lever is tem-
porarily attached to the actuating shaft.
Before leaving the WES1ERBEKE plant, each transmission
undergoes a test run, with Dextron III ATF transmission fluid.
The residual fluid remaining in the transmission after drain-
ing acts
as
a preservative and provides protection against cor-
rosion for
at
least one year
if
properly stored.
Oil COOLER
The oil cooler, mounted above the transmission, provides
continuous cooling for the transmission fluid. Raw water
passes through the tubes of the cooler and discharges over-
board. The transmission fluid is cooled as it flows around the
tubes and back into the transmission.
RAW WATER
CONNECTION
TRANSMISSION OIL COOLER
TRANSMISSION FLUID
RAW WATER
CONNECTION
Fill the transmission with Dextron 111 ATF.
The
fluid level
should
be
up to the mark on the dipstick. After checking the
level, press the dipstick into
the
case and
turn
it to tighten.
During the first 25 operating hours, inspect the bell housing,
output shaft and transmission cooler for leakage. The fluid
should be changed after the
first
25 hours and every 300
hours thereafter.
NEUTRAL SWITCH
These transmissions are equipped with a neutral safety
switch. This is· to prevent the engine from starting in gear.
Unless the transmission selector lever
is
perfectly aligned in
neutral, the engine starter will not activate.
INITIAL OPERATION
Set the shifting lever to neutral position
(N).
Start the engine
and let it run long enough in idle to fill the cooler and hoses
with transmission fluid. Shift into gear, forward and reverse;
shifting should be smooth and positive. Direct changes from
forward to reverse are permissible since the multiple disc
clutch permits changing at high rpm including sudden revers-
ing at high speeds in
the
event of danger.
After initial operation, make a visual inspection of the output
coupling, oil cooler and hoses, and the cable connections to
the transmission.
LOCKING THE PROPELLER
Locking of the propeller shaft by an additional brake is not
required: use
the
gear shift lever position opposite your direc-
tion of travel for
this
purpose. Never put the gear shift in the
position corresponding to the direction of travel of the boat.
WHEN UNDER SAIL OR BEING TOWED
Rotation of the propeller wi~out a load, such
as
when ·the
boat is being sailed, being towed
or
anchored in a river,
as
well
as
operation of the engine with the propeller stopped
(for charging the battery), will have no detrimental effects on
the transmission.
NOTE: When
the
boat is being sailed (engine stopped). the
gear shift
must
be in the neutral position.
The
propeller is at
idle
and can free-wheel.
DAILY OPERATION
0
Check the transmission fluid.
0
Visually check the gear shift linkage and transmission.
0
Start the engine in neutral, allowing a few minutes at idle
to
warm the fluid
0
Shift into gear.
NOTE: Too
low
an idle speed will produce a chattering noise
from the transmission gear
and
damper plate. Jn such cases
the idle speed should be increased.
Operating Temperature
The operating temperature of the transmission should not
exceed 176°F (80°C). A connection for a temperature probe
is provided. At maximum ouq)ut of the engine, the fluid may
reach 220°F (104 °C).
A
CAUTION:
II the transmission nuid temperature is
too high, stop the engine immediately and checlc the
transmission nuid.
Engines & Generators
88