Installation manual
ZF
MARINE
TRANSMISSIONS
INITIAL
OPERATION
All
ZF
marine
transmissions
are
test-run
on a
test
stand
with
the engine
at
the
factory
prior
to
delivery.
For
safety
reasons
the
fluid
is
drained
before
shipment.
Fill
the
gearbox
with
Automatic
Transmission Fluid
(DEXRON
II
or
DEXTRON
III).
The
fluid
level
should
be
up
to
the
index
mark
on
the
dipstick.
To
check
the
fluid
level,
just
insert
the
dipstick,
do
not
screw
it
in.
Screw
the
dipstick
into
the
case
after
the
fluid
level
is
checked
and
tighten.
Do
not
forget
the
sealing
ring
under
the
hexhead
of
the
dipstick.
Check
for
leaks
and
change
the
fluid
after
the
first
25
hours,
also
make
a
visual
inspection
ofthe coupling,
oil
cooler
and
hoses,
and
shift
cables.
VENT~--I':;~
I
.
11\1
1
'1
1
l~
"
FLUID
DRAIN
.
FLUID
CHANGE
KEEP
VENT
OPENING
CLEAR
FLUID
LEVEL
Change
the
fluid
for
the
first
time
after
about
25
hours of
operation,
then
every
250
operating
hours
or
at
least once a
year
or
when
you
change
engine
oiL
Removing
the
fluid
Push a
suction
pump
hose
down
through the dipstick hole
to
the bottom
of
the
housiag
and
suck
out
the
fluid.
(If
space
allows,
use
the
tranSmission
drain).
Remove the drain plug
from
the
bottom of
the
transmission
and
allow
the
fluid
to
drain
into
a container,
then
reinstall
the
plug
with
its
sealing
washer.
Wipe
down
the
transmission
and properly dispose of
the used
fluid.
After
running
the
engine,
shut down
and
recheck
the
fluid
leveL
DRAIN
PLUG
TORQUE
20
-
2511/1bs
NOTE:
When
changing
the
fluid,
take
care
not to
lose
the
drain
plug
sealing
washer.
The
drain
plug will leak without
this
sealing
washer.
A
WARNING:
Never
pullout
the
dipstick
while
the
engine
Is
running.
Hot
fluid
wIll
splash
from
the
dipstick
hole.
This
could
cause
severe
burns.
LOCKING
THE
PROPELLER
Locking
of
the
propeller
shaft
by
an
additional
brake
is
not
required:
use
the
gear shift lever
position
opposite
your
direction
of
travel
for
this
purpose.
Never
put
the
gear shift
in
the
position
corresponding
to
the
direction
of
travel of
the
boat.
WHEN
UNDER
SAIL
OR
BEING
TOWED
Rotation
of
the
propeller without
load,
such
as
when
the
boat
is
being
sailed,
being
towed,
or
anchored
in
a'river.
as
well
as
operation of
the
engine
with
the propeller stopped (for
charging
the
battery),
will
have
no
detrimental effects
on
the
transmission
DAILY
OPERATION
o Check
the
transmission
fluid.
o
Visually
check
the
gear
shift linkage
and
transmission.
o Start the engine in neutral, allowing a
few
minutes at
idle to
warm
the
fluid.
o Shift
into
gear.
NOTE:
Too
Iowan
idle
speed
will
produce
a chattering noise
from
the
transmission
gear
and
damper.plate.
In such cases
the
idle
speed
should
be
increased
For
adrlitional
iaformation refer to
the
following
text
in
this
Transmission
Section:
SHAFT
COUPUNGS,
MAINTENANCE
AND
TRANSMISSION
TROUBLESHOOTING.
ZF
TRANSMISSIONS
SPECIFICATIONS
General
Gear
Ratio
(optional)
No1e:
There
are
a
variety
of
gear
ratios
available.
Only
a
few
are
listed.
Fliud
Quantities
(approximale)
Lubricating
Fluid
Propeller
Shall
DIrection
01
Rotation
(ZF
Standard
Transmission)
Case
hardened
helical
gears,
with
a
servo-operated
multiple
disc
clutch
ZF
25M
(1.88:1
or
2.27:1
or
2.73:1)
ZF
25MA
(2.22:1
or
2.73:1)
ZF
30M
(2.14:1)
ZF
25M
-
1.58
pints
(0.75
litres)
ZF
25MA
-1.58
pints
(0.75
litres)
ZF
30M
-
1.90
pints
(0.90
litres)
ATF
-
Type
A
or
Dextron
-
II
or
III
Right-hand
rotation
lor
above
models
listed.
Engines & Generators
39