SYSTEMS AND SCHEDULED MAINTENANCE
32
Operator’s Manual Marine Diesel Engines
Revision 0. 05/2016
MAINTENANCE TASK. COOLANT FILL / CHANGE
1.
Drain off all the coolant by
opening the two drain plugs, one
in the heat exchanger and the
other in the cylinder block.
2.
Close the drain plugs.
3.
Remove bleeding bolt of thermostat
holder
4.
Refill to the hole in the tank cap with
coolant
MAINTENANCE TASK. SEAWATER FILTER INSPECTION
It is important to install a seawater filter
(supplied as accessory)
between seawater cock
and the seawater pump to avoid that any impurity might clog the seawater circuit or
seawater pump.
To clean this filter:
1.
Loosen the wing nut.
2.
Remove the filtering component.
3.
Clean it.
4.
Fit it again taking care that the cover is well
seated on the o-ring.
5.
Start the engine to check seawater leakages.
MAINTENANCE TASK. SEAWATER PUMP IMPELLER INSPECTION
Seawater pump impeller is neoprene and cannot rotate dried. If operated without water,
the impeller can be broken. It is important therefore that a spare impeller is always available.
Impeller inspection and replacement procedure:
1.
Close the seawater cock.
2.
Remove the seawater pump cover plate.
3.
Remove the impeller from the shaft.
4.
Clean the housing.
5.
Inspect the impeller for damaged,
cranked, broken, missing or flattened
vanes. The impeller vanes should be
straight and flexible.
If it is damaged replace with a new one.
6.
Lubricate the impeller with soapy water
before installation.
7.
Install the impeller.
During installation push and rotate the impeller in the same direction as the engine
rotation until it is thoroughly seated in the impeller housing.
8.
Inspect the cover plate and gasket for corrosion and/or damage. Replace
components as necessary.
9.
Lubricate the gasket with silicon grease and attach the gasket and cover plate to
the seawater pump housing.
10.
Open the seacock.
11.
Start the engine and check for leaks.
