Vetus COMBI4 Manuel D'utilisation Et Instructions D'installation page 27

5.2.7 Maintenance
Using the Blanking Plug
To protect the paddlewheel, use the blank-
ing plug:
• When the boat will be kept in salt water
for more than a week.
• When the boat will be removed from
the water.
• When aquatic growth build-up on the
paddlewheel is suspected due to inac-
curate readings from the instrument.
Warning
The O-rings must be intact and well
lubricated to make a watertight seal.
1 On the blanking plug, inspect the O-
rings (replace if necessary) and lubri-
cate them with the silicone lubricant
supplied or petroleum jelly (Vaseline®)
(see figure).
2 Remove the insert from the housing by
removing the safety wire and unscrew-
ing the cap nut (see figure under 5.2.5).
This will jack out the insert.
 With the blanking plug ready in one
hand, pull the insert most of the way
out. Remove the insert and rapidly
replace it with the blanking plug. With
practice, only 250ml (10oz.) of water
will enter the boat.
Warning
Be sure the blanking plug is fully inserted
into the housing, and the cap nut is
screwed on completely.
4 Screw the cap nut several turns until
the threads are engaged.
Continue to tighten the cap nut. HAND-
TIGHTEN only. Do not over tighten.
COMBI 4
BOW
1
1 Insert
2 Blanking plug
 Arrow
4 Large O-ring
5 Small O-ring(s)
6 Shaft
7 Flat side of blade faces bow
Replacing the paddlewheel and O-
rings
Warning
Always attach the safety wire to prevent
the blanking plug from backing out in the
unlikely event that the cap nut fails or is
screwed on incorrectly.
5 Reattach the safety wire.
Servicing the Insert
Aquatic growth can accumulate rapidly
on the depth transducer's surface and
impede or freeze the paddlewheel's rota-
tion reducing performance within weeks.
Clean the insert with a Scotch-Brite®
scour pad and mild household detergent,
being careful to avoid scratching the depth
transducer. If fouling is severe, remove the
paddlewheel (see step #1 below). Lightly
wet sand it with fine grade wet/dry paper.
The water lubricated paddlewheel bear-
ings have a life of up to 5 years on low-
speed boats (less than 10 knots) and 1
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