Operation
0620−1/A1
Winterthur Gas & Diesel Ltd.
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Prepare the Engine for a Long Shutdown Period
1. General
When you prepare the engine for a long shutdown period, make sure that you know
the correct precautions to protect the engine from corrosion. There are two conditions
as follows:
D Condition One has the procedures for when there is less crew on board for a
period of some weeks.
D Condition Two has the procedures when for some months there is no crew on
board.
2. Condition One
2.1 Procedure
Note: It is recommended that you operate the engine on diesel oil as an
alternative to heavy fuel oil for some time before engine shutdown (see
Change−over from Diesel Oil to Heavy Fuel Oil and Back 0270−1).
Note: The numbers (e.g. 30-8605_E0_7) refer to items shown in the control
diagrams 4003−2 and 4003−3.
1) Close the stop valves on the starting air bottles.
2) Turn the handwheel on the starting air shut-off valve 30-4325_E0_1 to the
position CLOSED.
3) Open the ball valves 30-8605_E0_6 and 30-8605_E0_7.
4) Make sure that the pressure gages show zero pressure.
WARNING
Injury Hazard: Before you operate the turning gear, make sure
that no personnel are near the flywheel.
5) Engage the turning gear.
Note: The water and oil pumps must operate for a minimum of 20 minutes after
the engine has stopped. This is to make sure that when the engine
temperature has decreased, the temperature of engine parts become as
stable as possible.
6) Open the indicator valves on the cylinder covers.
Post-lubrication starts automatically during the slow-down of the engine.
7) Close the stop valves on the fuel tanks.
8) Open the drain valves of the exhaust gas manifold and on the exhaust gas pipe
to drain the condensate.
9) Close the drain valves of the exhaust gas manifold and the exhaust gas pipe.
10) Put a cover (e.g. a tarpaulin) on the exhaust gas manifold and the turbocharger
silencer to make an airtight seal. This will prevent a flow of air through the engine
and thus condensation.
11) For the scavenge air coolers (SAC), see the recommended procedures in the
documentation of the manufacturer. If this is not available, it is recommended that
the SAC are fully drained, or the cooling water pump is operated daily for
approximately 30 minutes (with the flow quantity control valves in the same
position as for usual operation conditions).
12) Keep the cylinder cooling water at approximately room temperature (monitor the
temperature for a risk of frost).
Special Procedures Before and After Operation
2015-03
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