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SECTION II.
OPERATION AND MAINTENANCE
Lesson 12
Preparations Prior to Starting the engine
Directions for operation and maintenance of engines can be given with much greater de-
finiteness if intended for a single make or design. Nevertheless some directions are given here,
which are of fairly general application. Even where they are not directly applicable, they may
be suggestive as to what can be done in the particular case.
A. If the engine has not been operated since an overhaul: -
1. Make a thorough inspection to insure that all bolts have been properly set up, and that
all devices for preventing the loosening of nuts and pins by vibration have been installed.
2. Examine the piping connections to make sure that they have been properly made up –
this is especially important in the case of high-pressure air piping because serious injury to per-
sonnel may result if air should be turned into a disconnected pipe.
3. Go over the entire engine carefully to find any tools or other objects that may have fal-
len into the working mechanism.
4. With the compression released, jack the engine over by hand several times.
5. Check the cooling system: -
(a) Open the vents at the high point on the cooling system.
(b) Fill the engine jacket spaces completely.
(c) Be sure that there is an adequate supply of cooling water available before the engine
is started.
6. Before the engine is closed, examine the lubricating system: -
(a) See that no rags or other material have been left to plug piping or oil channels.
(b) Check the oil sump for the presence of water.
(c) Make sure that the oil is at the required level for engine operation.
B. If the engine is being started after a routine securing, the checking does not have to be
as extensive as just after an overhaul, but the operator must: -
1. Make certain that the moving parts of the engine are free.
2. See that the cooling system is full of water.
3. Check the lubricating oil in the supply sump.
4. Operate the hand or stand-by lubricating pump before or while the engine is being
jacked – to cover all journals and bearings with a film of oil before the engine is started.
5. Clean the filters before starting the engine if they are not cleaned during operation
routine.
6. Supply oil to all hand lubricated parts.
7. Test low-pressure oil alarm.
8. Fill the engine fuel-oil system.
9. Make sure that no water is present in the fuel.
10. Prime the fuel pumps and line through the priming arrangements, and make sure that
all air is expelled.
11. With the stand-by or hand-operated lubricating oil pump in operation before turning
the engine, jack the engine at least one full turn and disengage the jacking gear.
12. Open the sea-injection and overboard valve, and operate stand-by sea-water circulat-
ing pump.
13. See that there is an adequate flow of water through the cooling system.
14. Make sure that the controls are in stop position.
15. If engines are of reversing type, set the reverse gear in proper position.
33
SECTION II.
OPERATION AND MAINTENANCE
Lesson 12
Preparations Prior to Starting the engine
Directions for operation and maintenance of engines can be given with much greater de-
finiteness if intended for a single make or design. Nevertheless some directions are given here,
which are of fairly general application. Even where they are not directly applicable, they may
be suggestive as to what can be done in the particular case.
A. If the engine has not been operated since an overhaul: -
1. Make a thorough inspection to insure that all bolts have been properly set up, and that
all devices for preventing the loosening of nuts and pins by vibration have been installed.
2. Examine the piping connections to make sure that they have been properly made up –
this is especially important in the case of high-pressure air piping because serious injury to per-
sonnel may result if air should be turned into a disconnected pipe.
3. Go over the entire engine carefully to find any tools or other objects that may have fal-
len into the working mechanism.
4. With the compression released, jack the engine over by hand several times.
5. Check the cooling system: -
(a) Open the vents at the high point on the cooling system.
(b) Fill the engine jacket spaces completely.
(c) Be sure that there is an adequate supply of cooling water available before the engine
is started.
6. Before the engine is closed, examine the lubricating system: -
(a) See that no rags or other material have been left to plug piping or oil channels.
(b) Check the oil sump for the presence of water.
(c) Make sure that the oil is at the required level for engine operation.
B. If the engine is being started after a routine securing, the checking does not have to be
as extensive as just after an overhaul, but the operator must: -
1. Make certain that the moving parts of the engine are free.
2. See that the cooling system is full of water.
3. Check the lubricating oil in the supply sump.
4. Operate the hand or stand-by lubricating pump before or while the engine is being
jacked – to cover all journals and bearings with a film of oil before the engine is started.
5. Clean the filters before starting the engine if they are not cleaned during operation
routine.
6. Supply oil to all hand lubricated parts.
7. Test low-pressure oil alarm.
8. Fill the engine fuel-oil system.
9. Make sure that no water is present in the fuel.
10. Prime the fuel pumps and line through the priming arrangements, and make sure that
all air is expelled.
11. With the stand-by or hand-operated lubricating oil pump in operation before turning
the engine, jack the engine at least one full turn and disengage the jacking gear.
12. Open the sea-injection and overboard valve, and operate stand-by sea-water circulat-
ing pump.
13. See that there is an adequate flow of water through the cooling system.
14. Make sure that the controls are in stop position.
15. If engines are of reversing type, set the reverse gear in proper position.
33
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