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TM 10-4320-256-14&P
d Keep the engine air passages dean and free of accumulated dirt or sand that may obstruct the flow of air.
2-17. Operation In Rainy or Humid Conditions.
a. If the pump is installed outdoors in conditions of rain or high humidity, erect a shelter to protect the unit.
Cover the unit with a tarpaulin when inoperative if erection of a shelter is not possible.
b. Keep the fuel tank as full as possible at all times to prevent condensation.
c. Inspect the unit closely for corrosive action. Clean and paint chipped areas.
d. Refer to TM 9-2805-257-14 and lubricate the gasoline engine frequently. Always lubricate after operation.
2-18. Operation in Salt Water Areas.
a. Keep all components as clean and free of moisture as possible. Keep a thin coat of oil on all exposed
machined surfaces.
b. Clean and repaint all pre-painted surfaces as required.
c. If the pump assembly has been exposed to excessive salt water spray, wash all exposed areas with clean,
fresh water as soon as possible.
2-19. Operation at High Altitudes.
a. General. As the altitude increases, the thinning of air decreases decreases engine efficiency, reducing the pumping
efficiency. For this reason, it is important to maintain systems at peak efficiency to assure that all available power
is applied to the pump.
b. Engine Carburetor. Decreased air pressure at high altitudes will upset the calibratibn of the carburetor,
causing an excessively rich fuel-air mixture. Adjust the carburetor as instructed in TM 9-2805-257-14.
c. Engine Air Cleaner. Take care that the air cleaner is operating efficiently. Sevice the air cleaner as
necessary (TM 9-2805-257-14)
d. Ventilation. Provide adequate fresh air supply to keep the engine from overheating.
2-16
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