
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
ZF
15M
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.
SHAFT
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
torsion~
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
"DRlVESAVER" 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.
47
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 contro-l 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
proper lever travel at least each season.
NEUTRAL
FORWARD
A
SHIFT
LEVER
0.5mm
N
COVER
MINIMUM
DISTANCE
REVERSE
B
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