OPERATION
20
Operator’s Manual Marine Diesel Engines
Revision 0. 05/2016
1.
Lubrication oil pressure should be from 0,19 to 0,39 MPa (2 to 4 kgf/cm
2
) (2 to 4 bar)
at nominal speed.
2.
Coolant temperature should be 75 to 85ºC.
3.
Oil temperature should be 60 to 95ºC.
4.
Check for leakage of oil, coolant and fuel.
5.
Knocking should die away as coolant temperature rises. No other defective noise
should be heard.
6.
Check for exhaust colour and abnormal odours.
5.3. Stopping Engine
1.
REMOVE ENGINE LOAD.
Before turning off the engine, it
must be freed of all charges (disengaged gearbox to
neutral)
2.
TURN THE KEY TO STOP POSITION.
The key automatically
returns to the OFF position. All instruments are off.
3.
CLOSE THE SEACOCK.
If the needle of tachometer is marking counter rpm when the engine is off, turn the key
back to ON and then OFF again.
5.4. Engine Operation at Low Temperatures
Whenever the atmospheric temperature drops below zero, the following series of
circumstances occur:
The cooling liquids may freeze.
The oil becomes thicker.
There is a drop in the voltage at the battery terminals.
The inlet air temperature is low and the engine has difficulty in starting.
The fuel loses fluidity.
To prevent the damage caused by low temperature operation, the engine should be
prepared:
1.
Use special low temperature coolant or suitable anti-freezing agent concentration.
2.
Close the seawater cock, when the engine is stopped. Open the seawater filter
cover and start the engine adding a mixture of freshwater and suitable anti-freezing
agent concentration (see package labels) until the seawater circuit is filled
completely. Stop the engine and replace the seawater filter cover. Before starting
the engine again, open the seawater cock.
Repeat this operation whenever the engine is used at temperatures below 0ºC.
3.
Use oil with suitable quality and viscosity. SAE 15W40 is recommended.
Under
extreme conditions contact with technical support.
4.
Cover battery with an adequate material to protect it against the cold. Check that
the battery is fully charged.
It is also advisable to use a dielectric spray on the electrical connections.
5.
When starting the engine, make sure that the glow plugs become hot enough.
6.
If necessary, replace the diesel oil by a specified diesel oil type for low temperatures.
The accumulation of impurities in the fuel tank could cause faulty firing.
