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SERVICE BULLETIN
DATE:
December 6, 1983
BULLETIN NUMBER: 133
MODEL:
W10Two, W13, W2l, W27, W30, W33, W40, W50, W52, W58, W70,
W80, W100, W120 (All Related Generators)
SUBJECT: Z inc Pencil - #11885
A zinc pencil PN 11885 is located in the sea water cooling circuit of
all primary heat echangers on the above models.
The purpose of the
zinc pencil is to sacrifice itself to electrolysis action taking place
in
the
salt
water
cooling
circuit.
This
zinc
pencil
should
be
per iodically checked by unscrewing it from its mounting boss on the
exchanger.
For the lcoation of the zinc on your model, refer to the
cooling system section of your parts manual.
Replace the zinc pencil
as inspection dictates.
(Refer to Illustration A.)
Should material be flaking off the zinc, it should be scraped clean,
or be replaced by a good solid zinc pencil.
If it appears that a lot of material has been flaking off the zinc,
then it is advised that the end cap of the exchanger be removed, and
the flaked material be cleaned from that area of the exchanger.
A new
end cap gasket should be on hand in case it is needed when replacing
the end cap.
Refer to Service Bulleting #84 when removing end caps made of rubber.
ZINC #11885
PIN:
ILLUSTRATION A
REPLACE
CLEAN/REPLACE
J.
H. WESTERBEKE CORP.
AIION INDUSTRIAL PARK, AIION, MASS. 0232:1· (8171 588-7700
CABLE: WESTCORP, AIION· TELEX: 82-4444
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