© Scania Industrial & Marine Engines
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6. Every 400 hours:
CHECKING CORROSION
PROTECTION RODS
- Drain the seawater circuit and check the corrosion protection rods
(sacrificial anodes). Location as per drawing on page 11.
- Scrape away all loose material from the anode.
- Change if less than half the rod remains.
New rods are 55 mm long, diameter 17 mm.
If the corrosion protection rods are highly eroded, they should be checked
more often, e.g. every 200 hours.
7. Every 400 hours:
CHECKING SEAWATER PUMP
IMPELLER
- Close the bottom valve if the seawater pump is below the water line.
- Drain the seawater circuit.
- Remove the cover from the seawater pump.
- Check that the impeller vanes are not worn or damaged.
If the impeller often requires changing, it is necessary to improve
the purity of the seawater.
Changing the impeller
- Extract the impeller using extractor 98 482 (Scania special tool).
- Fit a new impeller and the cover. Check that the cover seal is not
hard or damaged.
Note:
A spare impeller should be carried on board.
- The impeller can become deformed after long periods of standstill.
Change before starting or remove the impeller before long periods of
disuse. Also see “Mothballing”.
