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TM 10-4320-316-14
SECTION IV. OPERATION UNDER UNUSUAL CONDITIONS
2-12. OPERATION UNDER UNUSUAL WEATHER. The DED pump assembly is designed to operate normally within a
wide range of climatic conditions. However, some extreme conditions require special operating and servicing procedures
to prevent undue loading and excessive wear on the equipment. These unusual conditions and the special steps to be
performed are listed in the following paragraphs.
a. Operation in Extreme Cold. (Refer to Figure 2-7.)
CAUTION
Freezing water can badly damage the DED pump assembly components. When
pumping operations are completed at temperatures near 32°F (0°C), disconnect
each end of all hose assemblies to prevent freezing water from damaging
equipment. This equipment is not designed for operation below 32°F (0°C).
(1)
Be sure to use proper engine oil for cold weather. Refer to Lubrication Order LO10-4320-316-12 for
the correct type of oil to use in the temperatures you will be experiencing.
(2)
Keep fuel tank full to prevent condensation. Condensation can freeze and clog the lines, filters, and
injectors. Water in the fuel can also make the engine hard to start and may make the engine run very roughly.
WARNING
Use of gasoline, paint thinner, or any other volatile liquid either as a fuel or as a
starting aid can result in serious injury to operating personnel. Addition of highly
volatile liquids put directly into engine could cause an explosion or fire.
CAUTION
Do not use more oil than specified as a starting agent or equipment damage could
result. Too much oil could result in engine reversal. Should this occur, engine
exhaust will be emitted from the air intake. Stop engine at once. The oil pump in
the engine does not work in reverse and severe engine damage could result.
CAUTION
If plug is not in place contaminants may enter engine and cause accelerated wear
of internal parts. Keep rubber plug in rocker arm cover except when adding oil for
cold weather starting.
(3)
Cold weather starting can be improved by the addition of engine oil in rocker arm cover.
Remove rubber plug (1) of rocker arm cover and add five or six drops of engine oil before starting.
(4)
Replace rubber plug (1) immediately after oil is added.
(5)
Start the engine immediately as described in paragraph 2-9.
2-20
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