HURTH
HBW/Zf
TRANSMISSIONS
DESCRIPTION
The information below is specific
to
the HBW
Transmissions, the
TRANSMISSION TROUBLESHOOTING
SECTION
applies to all models.
HURTH
HBW
150
ZF15M
A
CAUTION:
The
position
of
the
mechanism
behind
the
actuating
lever
is
factory-adjusted
to
ensure
equal
shift
lever
travel
from
neutral
position
A
and.B.
If
this
mechanism
Is
In
any
way
tampered
with,
the
transmission
warranty
will
be
void.
SHAn
COUPLINGS
WESTERBEKE recommends a flexible connection between
the transmission and the propeller shaft
if
the engine
is
flexi-
bly mounted,
in
order to compensate for angular deflections.
The installation
of
a special propeller thrust bearing
is
not
required, since the propeller thrust will be absorbed by the
transmission bearing, provided the value specified under
SPECIFICATIONS is not exceeded. However, the output
shaft should be protected from additional loads. Special care
should be taken to prevent
torsional vibration. When using a
universal joint shaft, make certain to observe the
manufacturers instructions.
Even with the engine solidly mounted, the use
of
flexible
coupling or
"DRIVESAVER" will reduce stress in the gear-
box bearings caused by hull distortions, especially in wooden
boats or where the distance between transmission output
flange and stern gland
is
less than about 800mm.
"Drivesaver" is a product
of
Globe Marine
Rockland, MA.
37
NOTE:
When installing the transmission, make certain that
shifting is
not
impeded by restricted movability
of
the cable
or
rod linkage, by unsuitably positioned guide sheaves, too
small a bending radius
or
other restrictions. In order to
mount a support
for
shift control cable connections, use the
two threaded holes located above the cable bracket mounted
on the gear housing. Refer to the WESTERBEKE parts
list.
SHIFT
LEVER
The transmission is suitable for single lever remote control.
Upon loosening the retaining screw, the actuating lever can
be moved
to
any position required for the control elements
(cable or rod linkage). Make certain that the shift lever does
not contact the actuating lever cover plate: the minimum
distance between lever and cover should be 0.5mm.
The control cable or rod should be arranged at right angle to
the actuating shift lever when in the neutral position. The
neutral position
of
the operating lever on the control console
should coincide with the neutral position
of
this lever. ·
The shifting travel,
as
measured at the pivot point
of
the actu-
ating lever, between the neutral position and end positions
A
and B should
be
at least
35mm
for the outer and
30mm
for
the inner pivot point.
A greater amount
of
shift lever travel
is
in no way
detrimental and is recommended. However,
if
the lever
travel is shorter, proper clutch engagement might be impeded
which, in turn, would mean premature wear, excessive heat
generation and clutch plate failure. This would be indicated
by slow clutch engagement or
no
engagement at all.
NOTE
Check
for
pfOI)er
lever
travel.
Inspect
the
security
of
the
cable
to
the
leverand
bracket
at
least
each
season.
CONTROL
CABLE
FORWARD
A
NEUTRAL
COVER
0.5mm
MINIMUM
DISTANCE
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