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Westerbeke 16.0KW SBEGA-50HZ Specifications Page 24

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COOLING
SYSTEM
RAW
WATER
INTAKE
STRAINER
NOTE:
Always install the strainer at
or
below the waterline so
the strainer will always be self-priming.
A clean raw water intake strainer is a vital component
of
the
engine's cooling system. Include a visual inspection
of
this
strainer when making your periodic engine check.
The
water
in the glass should
be clear.
Perform the following maintenance after every
100 hours
of
operation:
1.
Close the raw water seacock.
2. Remove and clean the strainer filter.
3. Clean the glass.
4.
Replace the sealing washer
if
necessary.
5. Reassemble
and
install the strainer.
6. Open the seacock.
7.
Run
the engine and check for leaks.
NOTE:
Also follow the above procedure after having run hard
aground.
If
the engine temperature gauge ever shows a higher than
normal reading, the cause may
be
that silt, leaves
or
grass
may
have been caught
up
in
the strainer, slowing the flow
of
raw water through the cooling system.
~
SEALING
WASHER~
STRAINER
~~,m:,
RAW
WATER
INTAKE
STRAINER
OWNER
INSTALLED
(TYPICAL)
RAW
WATER
PUMP
The
raw water pump is a self-priming, rotary pump with a
non-ferrous housing and a Neoprene impeller. The impeller
has flexible blades which wipe against a curved cam plate
within the impeller housing, producing the pumping action.
On
no
account
should
this
pump
be
run
dry.
There should
always be a spare impeller and impeller
cover
gasket aboard
(an impeller kit).
Raw
water pump impeller failures occur
when lubricant (raw water) is not present during engine
operation.
Such
failures are not warrantable,
and
operators
are cautioned to make sure raw water flow is present at
start-up.
The
raw water pump should
be
inspected
periodically for broken
or
tom impeller blades. See
MAINTENANCE SCHEDULE.
Changing
the
Raw
Water
Pump
Impeller
Close the raw water intake valve. Remove the pump
cover
and, with the aid
of
two small screwdrivers, carefully pry the
impeller out
of
the pump. Install the new impeller and gasket.
Move
the blades to conform to the curved earn plate and
push the impeller into the pumps housing.
When
assembling,
apply a thin coating
of
lubricant to the impeller and gasket.
Open
the raw water intake valve.
COVER
A
CAUTION:
If
any
of
the
vanes
have
broken
off
the
impeller,
they
must
be
found
to
prevent
blockage
in
the
cooling
circuit.
They
often
can
be
found
In
the
heat
exchanger.
~
WESTERBEKE
Engines & Generators
14
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