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Westerbeke 20B TWO Manual de Instalação Página 58

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HURTH
HBW/ZF
TRANSMISSION
TROUBLESHOOTING
CONTROL
CABLES
The majority
of
transmission difficulties arise as a result
of
improper clutch adjustments (manual transmissions) or
problems with control cables (hydraulic transmissions)
rather than from problems with the transmission itself.
HURTH!ZF clutches, in particular, are very sensitive to
improper cable adjustments.
If
you experience operating problems with the transmission,
shut the engine down. First check the transmission.fluid
level, then have a helper move the cockpit shift lever through
the full range - from neutral to full forward, back
to
neutral, into full reverse, and back to neutral - while you
observe the actuating lever
on
the transmission.
If
the remote
is stiff to operate, break the cable loose at the transmission
and try again.
If
it
is still stiff, check the cable for kinks
or
excessively tight bends, and check any linkage for binding.
Problem
Probable
Cause
Transmission
gears
cannot
be
shifted.
1.
Actuating
lever
is
loose.
Fails
to
move
into
gear.
2.
Shifting
cable
is
broken,
bent
or
A new cable and perhaps a new linkage mechanism may be
needed.
While the cable is loose, shift the transmission in and
out
of
gear using the lever on the side
of
the transmission to
make sure there's no binding inside the case.
If
the transmission passes these tests, crank the engine and
have a helper put it in forward and reverse while you observe
the propeller shaft;
if
the shaft isn't turning, the transmission
needs professional attention.
If
it does turn but there's no
thrust, check to see you still have a propeller on the end
of
the shaft or,
if
you have a folding
or
feathering propeller,
that it
isn't
stuck in the
"no
pitch" position.
NOTE:
If
you suspect a major problem in your transmission,
immediately contact your WESTERBEKE dealer or an
authorized marine transmission facility.
Verification/Remedy
1.
Tighten
damping
bolt
on
shifting
lever.
2.
Check
the
cable,
reattach
or
replace.
unattached.
Cable
radius
is
too
severe.
3.
Shift
lever
is
binding
against
cover
plate.
Transmission
shifts
into
gear,
1.
Output
coupling
is
not
turning.
but
fails
to
propel
the
boat.
2.
Propeller
shaft
is
not
turning.
Output
coupling
is
turning.
3.
Output
coupling
and
propeller
shaft
are
turning.
Delay
of
gear
engagement
or
engages
1.
Lever
travel
N
to
B
not
equal
to
N
to
A.
only
after
an
increase
in
speed.
Refer
to
diagram.
2.
Shift
level
travel
in
insufficient.
3.
Shift
lever
is
binding
against
cover
plate.
Transmission
noise
becomes
louder.
1.
Damage
starting
on
flexible
coupling
due
to
wear
or
fatigue,
possibly
due
to
misalignment
between
engine
and
driveshaft.
2.
Beginning
damage
of
bearings
in
transmission
due
to
torsional
vibrations.
running
without
fluid,
overload,
wrong
alignment
of
transmission,
or
excessive
engine
outplft.
Chattering
transmission
noise,
1.
The
engine
or
propeller
generates
torsional
mainly
at
low
engine
speed.
vibrations
in
the
drive
unit
which
produces
a
"chattering"
noise
in
the
transmission.
Boat
fails
to
attain
specified
max.
speed.
1.
Operating
temperature
is
high.
2.
Operating
without
cooling.
Oil
Leakage.
1.
Corrosion
at
radial
sealing
ring
and
shaft.
Damaged
sealing
ring._
2.
Misalignment
of
output
flanges.
NOTE:
If
you suspect a major problem in your transmission,
immediately contact your WESTERBEKE dealer
or
an
authorized marine transmission facility.
50
3.
Detach
the
shift
cable
and
operate
the
lever
by
hand.
Clearance
should
be
0.02
in
(0.5mm).
1.
Transmission
needs
professional
attention.
2.
The
coupling
bolts
are
sheared
or
the
coupling
is
slipping
on
the
propeller
shaft.
Tighten
or
replace
set
screws,
keys,
pins
and
coupling
bolts
as
necessary.
3.
Inspect
the
propeller.
It
may
be
missing
or
damaged.
A
folding
propeller
may
be
jammed.
A
variable
pitch
propeller
may
be
in
"no
pitch"
position.
1.
Adjust
cover
plate
until
the
lever
is
exact
mid-position.
Refer
to
SHIFT
LEVER
TEXT
AND
DIAGRAM.
2.
Check
shift
lever
cable
length.
See
SHIFT
LEVER
DIAGRAM.
3.
Check
clearance,
adjust
if
necessary.
1.
Check
alignment,
inspect
flexible
coupling.
If
noise
persists,
inspect
the
damper
plate
between
the
transmission
and
the
engine.
Replace
if
necessary.
2.
Transmission
needs
professional
attention.
1.
Mount
a
flexible
coupling
with
another
stiffness
factor
between
the
transmission
coupling
with
and
the
driveshaft.
A
higher
stiffness
factor
might
be
sufficient.
2.
Inspect
the
damper
plate
between
the
engine
and
the
transmission.
Replace
if
necessary.
1.
Wrong
type
offluid.
Use
AT
F.
Check
fluid
level.
2.
Check
cooler.
Inspect
coolant
hoses
and
coolant
flow.
1.
Transmission
needs
professional
attention.
2.
Check
alignment.
Must
be
within
0.003
in
(0.08rnm).
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