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TM 10-4320-324-14
NOTE
If engine speed decreases, start pumping; engine speed should increase.
(e)
Stop pumping when engine starts.
b.
Extreme Hot Weather.
(1)
Keep cylinder and cylinder head cooling fins clean.
(2)
Inspect cooling blower inlet often for any obstructions.
c.
Dusty or Sandy Areas.
(1)
Keep crankcase oil fill cap tight and dipstick seated to prevent contamination.
(2)
Keep cylinder and cylinder heat cooling fins clean.
(3)
Wipe spilled lubricants from assembly to avoid collecting dust and sand.
(4)
Use care when servicing fuel tank to prevent sand and dirt from entering the fuel system. Ensure that fill cap is
kept tight.
(5)
Pay particular attention to the air cleaner service indicator. Replace elements as required.
d.
Extreme Wet (fresh water) Areas. Except for modifying PMCS time intervals and ensuring that surface under unit is
firm enough to support pumping assembly, no special instructions are required for operation of pumping assembly in
damp or muddy areas.
e.
Salt Water Areas. When it is necessary to operate the pumping assembly near salt water, the following precautions
should be observed to provide maximum protection to the unit and to assure efficient operation.
(1)
Keep all electrical components clean, dry, and free of corrosion.
(4)
Wash unit frequently with fresh, clean water. Dry thoroughly.
(3)
Keep fuel filler cap tight.
(4)
Check all gauges for loose or broken lenses which might permit entry of moisture.
f.
High Altitude Areas. Power output and temperature level of a diesel engine are governed by careful matching of
combustion air and fuel injection volumes, and since the density of the combustion air taken in varies with the
atmospheric pressure and the ambient temperature, full rated power is obtained only at 985 feet (300 m) above sea
level and 68° F (20° C). Where engines are operated at greater altitudes and/or higher ambient temperature, they
must be de-rated (reduced fuel injection and hence engine loading). Therefore, never run the diesel engine in "thin
air" under heavy-duty conditions unless the engine has been de-rated, otherwise the engine's lifespan, reliability, and
exhaust emissions may be affected, especially at altitudes above 3280 feet (1000 m) and/or temperatures above
68°F (20° C).
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