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Westerbeke W-70GA Installationshandbuch Seite 52

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Seitenansicht 51
TRANSMISSION
TROUBLESHOOTING
CONTROL
CABLES
The majority
of
transmission difficulties arise
as
a result
of
improper clutch adjustments (manual transmissions) or prob-
lems with control cables (hydraulic transmissions) rather than
from
problems with the transmission itself.
HURTH 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-oil 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 exces-
sively tight bends, and check any linkage for binding. 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.
Problem
Transmission
gears
cannot
be
shifted.
Shifting
pressure
too
low.
Transmission
noise
becomes
loude'r.
Probable
Cause
1.
Shifting
lever
is
loose.
2.
Shifting
cable
is
broken,
bent
or
unattached.
3.
Loss
of
transmission
fluid.
4.
Water
in
transmission
fluid.
1.
Improper
fluid.
2.
Filter
is
dirty
(if
applicable).
3.
Water
in
transmission
fluid.
4.
Transmission
fluid
too
low.
5.
Air
vent
is
clogged.
1.
Fluid
level
too
low,
so
that
pump
sucks
in
air.
OIL
COOLERS
The continued flow of raw water through the cooler will,
in
time, erode the inside of the cooler causing cross
leaks
to
occur.
These internal cooler leaks will cause
one
of the
fol-
lowing two problems:
1. Transmission fluid
will
leak into the
flow
of
raw
water
and
be
discharged overboard through the engine exhaust.
A
loss
of
transmission fluid will
cause
the
transmission
to
fail.
2.
The raw water
will
leak into the transmission
fluid
caus-
ing
an
increase
in
transmission fluid. This contaminated
fluid
will
appear
as
strawberry cream.
The
transmission
will eventually
fail.
Either case requires
an
immediate response:
1. Install a
new
oil
cooler.
2.
Refill the transmission with DEXTRON III
ATF.
If
water has contaminated the fluid, the transmission fluid
needs to be cleaned out and replaced
with
fresh
fluid.
It
will
take several fluid changes
to
get rid of the contamination.
Check your dipstick each time until it appears
as
pure trans-
mission fluid. Change the transmission filter
and
clean out
the fluid lines that connect
to
the cooler.
If
the transmission fails to shift properly, it
will
most likely
need the attention
of
a qualified transmission service
facility.
A transmission cooler may last ten years or more
but,
in
some circumstances, depending
on
operating
hours,
tropical
waters, maintenance, etc. it might only last half that
time.
WESTERBEKE recommends having a spare cooler aboard
VerificationJRemedy
1.
Tighten
damping
bolt
on
shifting
lever.
2.
Check
the
cable,
reattach
or
replace.
3.
Check
for
leaks
at
transmission
seal
and
output
shaft.
Tighten
gear
case
bolts.
Check
all
oil
hoses
for
leaks.
Oil
cooler
leak
-
see
OIL
COOLER.
4.
Replace
oil
cooler
(see
OIL
COOLEFf).
High
water
in
engine
compartment,
remedy
cause.
Shifting
pressure
too
low,
see
item
2.
1.
Replace
with
DEXTRON
11/
ATF.
2.
Replace
filter.
3.
Replace
oil
cooler
-
see
OIL
COOLER.
4.
Add
fluid.
5.
Remove
paint/dirt
from
vent.
1.
Top
up
with
fluid
to
marking
on
dipstick.
2.
Damage
starting
on
flexible
coupling
due
2.
Replace
flexible
coupling.
Check
alignment
between
engine
to
wear
or
fatigue,
possibly
due
to
misalign-
and
transmission.
ment
between
engine
and
transmission.
3.
Beginning
damage
of
bearings
in
trans-
3.
Transmission
needs
professional
attention.
mission
due
to
torsional
vibrations,
running
without
fluid,
overload,
wrong
alignment
of
transmission,
or
excessive
engine
output.
Engines & Generators
46
Seitenansicht 51
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