Kohler 4EF Operatie - Pagina 27
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3.7.3
Seawater Pump
The direct-driven seawater pump is located on the
generator end of the generator set. Check and change
the seawater pump impeller at the interval specified in
the service schedule. Follow the instructions included
with the impeller kit. If the instructions are not included
with the kit, use the following procedure:
Impeller Inspection and Replacement Procedure:
1. Close the seacock.
2. Remove the seawater pump coverplate.
Figure 3-6.
3. Remove the impeller.
4. Inspect the impeller for damaged, cracked, broken,
missing or flattened vanes. The impeller vanes
should be straight and flexible. See Figure 3-7.
Replace the impeller if it is damaged.
1
10
9
8
7
1. Seawater pump
2. Coverplate
3. Gasket
4. Impeller
5. Bearing
6. Housing
Figure 3-6 Seawater Pump, Typical
TP-5985 10/02
11
2
3
4
5
6
TP-6053
7. Pulley
8. Drive shaft
9. Washer
10. Nut
11. Mechanical seal,
if equipped
1. Flattened vane
2. Crack
See
3. Broken vane
Figure 3-7 Worn Impeller
5. Lubricate the impeller with soapy water before
installation.
6. Install the impeller.
Note: During installation push and rotate the
impeller in the same direction as the engine
rotation until it is thoroughly seated in the
impeller housing.
7. Inspect the coverplate and gasket for corrosion
and/or damage.
necessary.
8. Lubricate the gasket with silicon grease and attach
the gasket and coverplate to the seawater pump
housing.
9. Open the seacock.
10. Start the generator set and check for leaks.
11. Stop the generator set and repair leaks or replace
damaged or worn components.
1
2
3
Replace components as
Section 3 Scheduled Maintenance
TP-6053
m:sm:003:008
15