,i"t' '
':~
30. CHECKING ZINC ANODE (At least once annually):
i,
1. Oose gate valve and open water pump drain :
cocks. Loosen cover plate (3), allowing air ' 3
into container to assist draining., ~~~
" 2. t!nscrew zinc anode (1) from forward end of ~~
~~~~~)""'" r 2
;: sllencer(2). ~"~~ ~
3. If a deposit bas formed on the anode, this ~ ~ ~
shouldbescrapedoH. ",~
~Il" // /'1
If more than half the anode bas been cor- . cC
roded away, it should be renewed. "'- I III~» I ,/ '~;
Spare Part No 516.006. '-""" d ~
.. zmc anode and sllencerbody. 1
5. Oase drain cocks. Tighten down silencer "
cover plate. Open gate valve,
In the case of fresh water cooled engines, top Fig. 44
~ up with anti-freeze.
,..
,:, 31. REPLACEMENT OF IMPELLER (as required):
The pump is self-priming and self-lubricating and it requires no maintenance apart
from replacement of impeller.
The impeller (4) is made of neoprene rubber
and it will be damaged if run dry as a resultof a 5' 2
cooling water block~e.
.
1. Oose gate valve. Undo screws (1) and remove
coverplate (2) and gasket (3).
2. Insert a screwdriver (6) from one side, lever- ~
~'; ó ing .against the pump housing (5) to ease oH :';
. thelmpeller. "'~. ':"
" , -ti
.,3. Fit new impeller, (Part No 947.010), replace '
. pump coverplate and tighten screws evenly. ~
. Open gate valve. I
6 1
"l If there is a risk ot trost:
, Oase gate valve and slacken oH pump cover-
l'" plate(2). Fig. 45
c'
35
t~,.'
~
c~
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