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Page Title: SECTION IV. OPERATION UNDER UNUSUAL CONDITIONS
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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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