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EXTREME   COLD   WEATHER   MAINTENANCE - TM-9-2350-238-10_201
Cooling   System   Maintenance

TM-9-2350-238-10 Semi Trailer Tank 5000-Gallon Fuel Dispensing Automotive M969A 2 (NSN 2330-01-377-9337) Manual
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TM   9-2350-238-10 EXTREME   COLD   WEATHER   MAINTENANCE–CONTINUED (5) Fill   fuel   cell   with   fuel,   grade   DF-A (NATO   F-56)   and   install   fuel   fill   cap. (6)   Provide   suitable   container   and   drain approximately   one   quart   of   fuel   from   each   of the   low   pressure   and   high   pressure   fuel   filters (2   and   3).   Close   drain   valves. (7)   prime   fuel   system.   Refer   to   page 3-32. (8)   Use   fuel   cycle   switch   (4)   and   pump and   heater   igniter   switch   (5)   for   approximate- ly   2   minutes   and   then   idle   engine   at   1200 rpm   for   5   minutes   to   warm   up   engine. c.  Coolant   System   Maintenance.   Refer   to FM   9-207   for   instructions   on   draining   and cleaning   coolant   system   and   selection,   ap- plication   and   checking   of   antifreeze   comounds to   suit   anticipated   conditions. (1)   Check   and   make   sure   antifreeze   in coolant   is   correct   for   lowest   anticipated temperature.   When   adding   water   to   system, make   sure   antifreeze   protection   is   maintained. Operate   engine   to   mix   coolant. (2)   Operate   coolant   heater   when   vehicle is   parked,   if   installed   (Chapter   5). (3)   Make   sure   fan   well   deck   is   covered when   vehicle   is   parked   to   keep   out   blowing snow.   Check   and   remove   any   accumulated snow   from   fan   well   before   starting   engine. d.   Battery   Maintenance.   Refer   to   FM 9-207   for   method   of   correcting   specific   gravi- ty   readings   for   batteries   exposed   to   extreme cold. (1)   Start   and   run   engine   for   approx- imately   30   minutes   at   1200   rpm   to   charge batteries   immediately   after   adding   water   to batteries   so   water   will   combine   with   battery acid  and  not  freeze. (2)   Keep   batteries   fully   charged   during extreme   cold   weather.   The   colder   batteries become   the   more   battery   electric   power   out- put   is   diminished. (3)   Operate   coolant   heater,   if   installed (Chapter  5),  when  vehicle  is  to  be  parked  for  several hours.  If  coolant  heater  is  not  installed,  have  unit maintenance  personnel  remove  batteries  and  store  in a   warm   place.   When   reinstalling   batteries,   make sure  cables  and  terminals  are  clean  and  tight. Change   3 3-55







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