Raw Water System
WARNING!
Risk of water entry. Close and drain the raw water
system before starting any work on the system.
Raw Water System, Draining
1 Close the raw water in- and outlet cocks.
2 Open the drains, refer to chapter
, and allow the water to drain.
IMPORTANT!
Check that the raw water really drains. Deposits may
need to be removed from inside the drain plugs/taps.
Impeller, raw water pump
Checking and changing
IMPORTANT!
Always keep a spare impeller and gasket in store
aboard the ship.
1 Close the raw water cocks and drain the external
cooling water as described in the chapter draining
the raw water system.
2 Remove the pump end cover (1), the seal (2), and
the impeller(3).
3 Inspect the impeller. Change the impeller if there
are any visible cracks or other defects.
4 Clean the inside of the housing. Lubricate the pump
housing and the inside of the cover with water-
resistant grease (non-aggressive on rubber).
5 Push the impeller into position while rotating it in the
normal operating direction.
6 Fit the cover with a new seal.
7 Open the raw water cocks.
1
2
3
P0003701
Maintenance
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