Westerbeke 38B FOUR Betreibershandbuch PDF herunterladen (Seite 57)

Sea

Waler

Circuit

The sea water flow

created by a bel!-

driven, positive displacement, neoprene

impeller pump, The pump draws sea

water directly from the ocean through the

sea

cock

and sea water strainer and pas-

ses the water

the heat exchanger's sea

water

inlet. The sea water passes through

the heat exchanger's lUbes, from which

heat

from the fresh water system

ab-

sorbed, and then the sea water

dis-

charged

from

the

cooling

system

overboard through the water-injected wet

exhaust system, Be sure to clean zinc

debris from the area inside of the heat ex-

changer where the zinc anode

posi-

tioned,

. :.;

;

::~

NEW

ANODE

.....

CLEAN

REPLACE

Zinc Anode Condttions

A zinc anode,

pencil,

located in the sea water cooling circuit within the heat exchanger, The purpose

of the zinc anode

sacrifice itsell

electrolysis action taking place

the sea water cooling circuit, there-

reducing the effects of electrolysis on other components

the system, The condition of the zinc anode

should be checked monthly and the anode cleaned or replaced as required, Spare anodes should be car-

ried on board,

Sea Water

Pump

The sea water pump

a self-priming, gear-driven rotary pump with a non-ferrous housing and a neoprene

impeller. The impeller has flexible vanes 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), Sea water failures

occur

when lubricant (sea

water) is not present.

Such failures are not warrantable and the operator's are cautioned

make sure sea

waler flow is present at start-up.

Alternator

and

Waler

Pump

Drive Bel! Tension

IWARNING!

Never attempt

adjust the drive belt's tension while the engine

in operation,

CAUTION

Excessive alternator and water pump drive belt tension can cause rapid wear of the belt and

reduce the service

lile of the fresh water pump and alternator shaft bearings, Excessive slack

or the presence

oil on the belt can cause belt slipping, resulting

high operating tempera-

ture, as well as insufficient alternator output.

Weslerbeke Diesel Engines

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