Zinc Anodes, Check and Change
WARNING!
Risk of water entry. Close the seawater cocks before
doing any work on the seawater system.
1 Close the seawater tap.
2 Open the heat exchanger drain tap (1) and drain off
the seawater.
3 Remove the zinc anodes (Z) (2 pcs.) from the heat
exchanger.
Check that the O-ring is in good condition,
otherwise change it.
4 Check the zinc anodes and change them if they
have been consumed below 1/3 of their original
size. If not, clean the zinc anodes with emery cloth
to remove the oxide layer before re-installing them.
IMPORTANT:
Use emery paper. Do not use a wire brush or other
steel tools when cleaning, as these may damage the
galvanic protection.
5 Install the zinc anodes. When installing, make sure
there is good metallic contact between the anode
and the casting.
6 Close the drain tap (1 ).
7 Open the sea cock before starting the engine.
8 Check that there are no leaks.
Maintenance
47708638 09-2016 © AB VOLVO PENTA 109
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