Zinc Anode; Air Intake/Silencer; Filter Cartridge - Westerbeke 10.0 EGTD Operator's Manual

COOliNG .SYSTEM
Zinc Anode
A zinc anode, or pencil, is located in the raw water cooling
circuit within the heat exchanger. The purpose of having the
zinc anode is to sacrifice itself to electrolysis action taking
pJace in the raw water cooling circuit, thereby reducing the
effects of electrolysis on other components of the system.
The condition of the zinc should be checked monthly to
determine its service life. Once that is established, the zinc
replacement period can be noted in your maintenaJ;Jce log.
Spare zinc anodes should be carried on board.
NEW
REPlACE REPlACE
ZINC ANODES
CLEAN AND
REUSE
NOTE:
Electrolysis action is the result of each particular
installation and vessel location; not that of the engine.
If the zinc anodes need replacement, hold the hex boss into
which the zinc anode is threaded with a wrench while loos-
ening the anode with another wrench. This prevents the hex
boss from possibly tearing off the exchanger shell. After
removing the zinc, note the condition of
it. If
the zinc is in
poor condition, there are probably a lot of zinc
flakes within
the exchanger. Remove the end of the heat exchanger and
clean the inside of all zinc debris. Always have a spare heat
exchanger end gasket in case the present one becomes darn-
aged when removing the end cover. Replace the gasket (refer
· to your engine model's heat exchanger end gasket part num-
ber), 0-ring and cover, and install a new zinc anode.
NOTE:
Th£4 threads of the zinc anodes are pipe threads and
~o
not require_ sealant. Sealant should not be used as
it
may
msulate the zmc from the metal of the heat exchanger hous-
ing preventing electrolysis action on the zinc.
Heat Exchanger Service
After approximately 1000 hours of operation, remove; clean
and pressure test the engine's heat exchanger. (A local auto-
motive radiator shop should be able to clean and test the heat
exchanger.)
NOTE:
Operating in silty and/or tropical waters may require
that a heat exchanger cleaning be performed more often than
every JOOO"hours.
AIR INTAKE
I
SILENCER
DESCRIPTION
A marine diesel engine running at 1800 fPID will typically
consume as much as 6,000 cubic feet of air per hour. Not
only must the engine room be well ventilated, the air flow
into the engine must be unrestricted.
AIR INTAKE FILTER/SILENCER
The replaceable canister contains a paper element that should
be inspected every
100
operating hours. Dirt in the element'
can be shaken off or cleaned with compressed air, however,
if the element is greasy or black with dirt, the canister must
be replaced, cany a spare. ·
NOTE:
To operate efficiently
a
diesel engine must intake a
continuous volume of clem·
ail:
Hard stm1ing,
an
erratic idle,
and black exhaust smoke are all symptoms of a restricted ait
inrake.
FILTER CARTRIDGE INSTALLATION
Remove the two bolts that secure the air intake silencer
housing to the base exposing the air filter element. Remove
the filter element, inspect, clean and/or replace. Reinstall and
secure the housing to the base with the two bolts.
NOTE:
Regular inlet filter cartridge maintenance is essential
for proper engine operation. Failure to maintain the inlet
filter cartridge will result in air obstruction into the engine,
causing poor fuel combustion and resulting in smokey/sooty
exhaust discharge-along with lube oil consumption and
possible filter dete1ioration which could result in internal
engine damage.
FILTER CARTRIDGE
PNIID39705
Engines'& Gj;nerators
16 .