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 TM 55-1905-221-14-1
2-10.
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.
a. Engines.
Keep engine compartment as cool as possible by use of ventilaton fans.
i
b. Batteries.
(1) Check electrolyte level often and fill as necessary.
(2) Keep terminals free of corrosion.
(3) Reduce specific gravity (TM 9-6140-200-14).
c. Cooling System.
Check water temperature gage often. Temperature should not rise above 185'F (74 ). If this temperature is
C
exceeded, check for the following:
(1) Insufficient supply of fresh water in the Keel cooling system. If so, fill expansion tank and check for
leakage.
(2) Engine coolant thermostat faulty. Remove and inspect; replace if found faulty.
(3) Sea water (raw water) inlet clogged at sea chest. Blow out sea chest with compressed air.
(4) Engine fresh water pump faulty. Remove and inspect; replace if found faulty.
(5) Scale or deposits in raw water side of heat exchanger. If present, clean heat exchanger.
d. Lubricating Oil System.
(1) Check lubricating oil pressure gage often. Pressure will drop slightly as water temperature rises.
(2) Refer to LO 55-1905 for instructions concerning lubrication of engines during operation in hot weather.
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