Installation manual
TRANSMISSION
TROUBLESHOOTING
(ZF
MODELS)
Problem
Chattering
transmission
noise,
mainly
at
low
engine
speed.
Transmission
shifts
into
gear,
but
fails
to
propel
the
boat.
Problem
High
fluid
temperature.
Fluid
on
transmission
housing.
Fluid
and
water
mixed,
shifts
hard.
Slow
engagement.
No
movement
of
the
boat.
Probable
Cause
1.
The
engine
or
propeller
generates
torsional
vibrations
in
the
drive
unit
which
produces
a
"chattering"
noise
in
the
transmission.
1.
Oufput
coupling
is
not
turning.
2.
Propeller
shaft
is
not
turning.
Output
coupling
is
turning.
3.
Output
coupling
and
propeller
shaft
are
turning.
Verilicatlon/Remedy
1.
Mount
a
flexible
coupling
with
another
stiffness
factor
between
the
transmission
and
engine.
A
coupling
with
a
higher
stiffness
factor
might
be
sufficient.
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.
HSW
TROUBLESHOOTING
Probable
Cause
Verllication/Remedy
1.
Fluid
level
high
during
operation.
1.
Pump
out
fluid
to
the
maximum
and
mark
on
dipstick.
2.
Fluid
level
low.
2.
Add
fluid.
3.
Plugged
or
restricted
fluid
cooler.
3.
Replace
cooler
and
flush
water
system.
4.
No
water
in
cooling
system.
4.
Check
cooling
system
and
repair.
5.
Filter
clogged
(if
applicable).
5.
Replace
element.
1.
Loose
screws.
1.
Tighten
to
specification.
2.
Loose
screw
connections.
2.
Tighten,
replace.
.
3.
Loose
dipstick.
3 •
Tighten,
replace.
4.
Loose
fluid
filter.
4.
Tighten,
replace.
5.
Fluid
level
high
during
operation.
5.
Pump
out
fluid
to
the
maximum
and
mark
on
dipstick.
1.
Oamage
to
fluid
cooler
..
1.
Replace
cooler
and
flush
transmission
and
hoses.
2.
Selector
control
linkage.
2.
Refer
this
manual.
1.
Selector
control.
1.
Refer
this
manual.
2.
I.cw
fluid
level.
2.
Add
fluid.
3.
Unkage.
3.
Adjust
(refer
this
manual.
1.
Selector
control.
1.
Consult
service
station.
2.
Improper
selector
position.
2.
Adjust
(see
this
manual).
3.
Low
fluid
level.
3.
Add
fluid.
4.
Propeller
missing.
4.
Replace.
5.
Propeller
shaft
broken.
5.
Contact
marine
repair.
6.
Transmission
malfunction.
6.
Contact
manufacturer.
7.
Engine
malfunction.
7.
ContaCt
marine
repair.
NOTE:
If
you
suspect a major
prt}Q.!em
·iWYour
transmission,
immediately
contact your
WESTERBEKE
dealer or
an
authorized
marine
transmission facility
..
~
WESTERBEKE
Engines & Generators
48