Replacing The Sea Water Pump Impeller; Ghecking The Reverse Gear And Reduction Gear; Checking The State Of Charge Of The Battery; Cables And Cable Terminals - Volvo Penta MB 10 A Instruction Book

SERVICING
REPLACING THE
SEA.WATER PUMP
IMPELLER
The pump impeller
is made
of
neoprene rubber and this can
be
damaged in the
case
of
water deficiency
caused
by, for
example, blocking
of
the sea-water
inlet.
The
pump impeller
is
changed
as
fol lows:
1.
Close
the bottom cock.
Remove
the
cover
from
the
sea-water
pump. Note
the
risk
of
water getting
into
the
boat.
With the
help
of
two
screwdrivers
pullthe
shaft
with
the pump impeller out of
the
housing as
far
as
necessary
in order to
reach
the bolt
retaining the impeller.
See
Fig 21.
NOTE. Place
some
kind of
protection
under the screwdrivers in order not to
damage
the impeller
housing.
2.
Pull the impeller
off
the shaft.
Clean
the inside of the pump
housing and
fit
the
new impeller.
3.
Fit
the cover
with
its original gasket which
has
the right
thickness.
Always
have
a spare
impeller on board.
Open
the bottom
cock.
Fig.21
.
Removing impeller.
Arrow points to
impeller
lock bolt
16.
Electrical
system
CHECKING THE STATE
OF CHARGE OF THE BATTERY
The state of
charge
of the battery should
be checked at least once each season. This
is done
by
using a hydrometer
which
shows
the specific gravity of the electrolyte,
this
varying
with
the state
of
charge. (See under
"Technical Data".)
CABLES AND CABLE TERMINALS
At
regular intervals check that
all
cable
terminals
are
properly
tightened and that
none
of the
cables is damaged.
STARTE R-GENERATOR
All work
on the starter-generator (and alternator
lf fitted)
should be carried
out
by
an
authorized service
workshop.
lnspection and
control
should be done when the
engine
is
given
a
qeneral overhaul.
20
SERVICING
NOTE. This is
particularly important when the
engine is
fitted with
an
alternator.
The battery poles and cable clamps should be
well
tightened and smeared
with
grease
or
vaseline.
WARNING!
lf
the alternator and its
regulator are
to
function perfectly,
it
is
extremely
important that
the
following instructions
are
followed:
1.
Never break
the
circuit
between
the
alternator and
battery while
the engine
is
running. The result
will
be a
short-circuit in the regulatorwhich
is
immediately
ru
ined.
The
master
switch must never be switched
off
before the engine
has
completely
stopped.
2.
Never confuse
the battery poles
with
one another.
The poles are generally
stamped
with
a plus and a minus sign respectively. The minus pole must always
be
earthed to the engine block.
3.
Use
only Volvo
Penta
double diode kits when charging
two
batteries
from
one
generator.
4.
ln
the
case
of
starting
by
using
a
spare
battery, this should
be
done
as
follows:
Let the ordinary battery
remain connected
in
circuit.
Connect
the
spare
battery
to the
ordinary battery,
plus
to
plus and minus
to
minus. When the
englne starts disconnect
the
spare battery
but
never break the
circuit to
the
ordinary batlery.
Never
use a
rapid charger
while the alternator
is
connected
to
the battery.
Always disconnect
both battery
cables
before carrying
out
any
work on
the
alternator equipment.
7.
lf
electric welding
work
is
to
be
carried
out on
the engine
or installation units,
disconnect
the charging regulator cables
at the alternator and insulate.
8.
Check vee-belt tension and cable connections
at regular intervals.
17.
Ghecking the
reverse gear and reduction gear
The
reverse gear and reduction gear should be checked regularly
for oil
leakage,
abnormal
noise
or
excessive
operatinq temperature.
When remote
control
is connected,
it
must be so designed
that there
is
no constant
pressure on the control components
of the
reverse
gear. When
reverse gear
is enga-
ged
for "Forward" or "Reverse",
the remote control should be completely off-
loaded.
Adjust
if
necessary
by
loosening
the lock nut
and
turning the cable
"dice".
5.
6.
21