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 TM 55-1905-222-14
2-7 HOT WEATHER OPERATION.
WARNING
Fuel oil and other similar materials are highly volatile In hot
weather and these vapors increase the possibility of an
explosion. Be sure all spilled petroleum products are wiped up.
Inspect for leaks in fuel lines and fittings. Pump bilges regularly.
2-7.1 Engines. Keep engine compartment as cool as possible by use of ventilation fans.
2-7.2 Batteries.
a
Check electrolyte level often and fill as necessary.
b
Keep terminals free of corrosion.
c.
Reduce specific gravity (TM 9-6140-200-14)
2-7.3 Cooling System. Check water temperature gauge often Temperature should not rise above 185F
(74C). If this temperature is exceeded, check for the following:
a.
Insufficient supply of fresh water in the engine cooling system. If so, fill expansion tank and check for
leakage.
b.
Engine coolant thermostat faulty. Refer to TM 5-2815-231-14.
c.
Sea water (raw water) inlet clogged at sea chest Blow out sea chest with compressed air
d.
Engine fresh water pump faulty Refer to TM 5-2815-231-14.
2-7.4 Lubricating Oil.
a.
Check lubricating oil pressure gauge often. Pressure will drop slightly as water temperature rises.
b.
Refer to LO 55-2815-231-14 for instructions concerning lubrication of engines during operation in hot
weather.
2-8 FOUL WEATHER OPERATION.
a.
Check to see that all gear and equipment are properly stowed and secured.
b
Should the engines be operated at high speed in rough water, the engines will surge when the
propellers leave the water, causing excessive vibration. The governor may be overworked under these
conditions, and it will be necessary for the protection of the engines and safety of the vessel to reduce
the speed of the engines until a safe operating speed is attained, as determined by the state of the sea.
Change 6
2-62
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