Section II. OPERATION UNDER UNUSUAL CONDITIONS

TM 5-4320-273-14

Figure 2-4. Performance of pump unit pumping fuel at 0.75 specific gravity.

a. Pump capacities are shown in gallons per

transfer, dispensing, and receiving, it is most desirable

minute. Pump discharge pressures are shown in pounds

that you maintain the engine speed at a constant level.

per square inch and in feet of head of the liquid pumped.

This may be accomplished simply by adjusting the

b. For various operations of the pump unit, that is,

engine throttle control.

Section II. OPERATION UNDER UNUSUAL CONDITIONS

d. Battery. Increase battery PMCS frequency.

2-12. Extreme Heat.

Use distilled water or a good grade of drinking water

Under conditions of extreme heat, you should locate the

(excluding mineral water).

pump in a wellventilated area which will allow a

maximum amount of cool air for cooling the engine.

2-13. Extreme Cold.

a. Cooling System Protection. Be sure that all

shrouding is installed and in good condition. Keep

cylinder head and cylinder fins free from any oil an-or

Under conditions of extreme cold, you should, if

dirt.

possible, locate the unit so as to provide shelter from the

b. Lubrication. Make sure the lubricants used are

elements, using a building, a snowdrift, canvas, or a hill

in accordance with the expected air temperatures and are

as a windbreak. Cover the unit when not in use. You must

in accordance with LO 5432027312.

observe special precautions to obtain satisfactory

performance of the equipment in sub zero temperatures.

c. Fuel System Protection. Fill the fuel tank at the

To help prevent malfunctioning and to assure continuous

end of each day's operations to prevent an accumulation

of vapor in the fuel tank.

operation, observe the following procedures.

Change 4