Nanni Q2400 Series, Руководство пользователя

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S 07 MAINTENANCE
RAW WATER AND COOLANT SCREWS,
CLAMPS, AND HOSES TIGHTENING
IMPORTANT!
Check that the hoses are correctly attached during the
first maintenance visit (20 hours or at the latest 30 days
after commissioning whichever comes first) and then
every 250 hours of use or every year, whichever comes
first.
If the hose clamps are loose, apply oil to the threads and
tighten them securely.
The hoses are rubber made, in contact with heat, oil, fuel,
etc.... and tend to age. They should be inspected and re-
placed if necessary. If any cracks appear replace imme-
diately. Also replace the collars and tighten them firmly.
CAUTION!
To avoid serious engine damage, prevent dust and foreign
object from getting inside hoses.
RAW WATER IMPELLER PUMP REPLACEMENT
CAUTION!
Before replacing the seawater pump impeller, make sure
that the sea water valves are all closed and the engine is
stopped.
Close the seawater suction and discharge valves.
Unscrew and remove the 6 screws from the cover ( 1)and
the cover (2) from the seawater pump.
Remove the paper seal and clean the contact surface.
Pull the impeller (3) out of the seawater pump using a pli-
ers.
Inspect the inside of the pump for wear, and clear away
debris. Change worn out components as necessary.
Change the impeller shaft seal as necessary.
Lubricate the lip seal with glycerin (do not lubricate me-
chanical seal).
Lubricate the inside of the pump with the glycerin includ-
ed in the kit. 6. Install the new impeller with a rotating
movement in the direction that the impeller will turn in,
please refer to the illustration.