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Section   IV. MAINTENANCE  UNDER  UNUSUAL  CONDITIONS
EXTREME   COLD   WEATHER   MAINTENANCE - TM-9-2350-238-10_202

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 GENERAL–CONTINUED (3)    Fording. a. Do  .  .  .  .  .  .  .  .   .Make   sure   all   hull drains   (3   places)   are   closed   and all  hull  covers  and  access  plates are   securely   in   place.   Install power   plant   reservoir   drain   plug in   bottom   of   access   plate,   if removed. b.   Do  .  .  .  .   .  .  Make  sure  basic  issue EXTREME   COLD   WEATHER   MAINTENANCE a.   General.   In   extreme   cold   weather, special   purpose   kits   (Chapter   5)   should   be   in- stalled   and   operated.   Maintenance   in   extreme cold   is   difficult   in   the   field.   Cold   increases maintenance   time.   At   temperatures   below –40°F (–40°C), maintenance requires up to five   times   the   normal   amount   of   time.   Bare hands   stick   to   cold   metal.   Fuel   in   contact with   hands   results   in   super-cooling   due   to evaporation   and   hands   can   become   frostbit- ten.   Engine   oils,   except   subzero   grade,   cannot be   poured   at   temperatures   below   -40°F ( - . 4 0 ° c ). b.   Fuel   System   Maintenance.   When   condi- tions   indicate   that   temperatures   are   going   to be     below     –25°F     (–32°C),     drain,     purge,     and fill   fuel   cell   and   fuel   lines   with   arctic   fuel. NOTE Draining   fuel   system   must   be coordinated   with   unit maintenance   personnel. (1)   Remove   fuel   fill   cap   (1). (2)   Place   suitable   container   under   vehi- cle.   Fuel   cell   contains   260   gal.   (984   l). items   are   properly   stowed   and secured. c. Do  .  .  .  .   .   .   Open   hull   drain   valves and   drain   accumulated   water after   crossing   is   completed. d.    Do  .  .  .  .   .  .  Check  engine  oil  level and   crankcase   for   evidence   of water   as   soon   as   possible   after crossing. NOTE Regular   grade   fuel,   DF-2   (NATO F-54),   will   thicken   or   partially solidify   at   extreme   cold   temper- atures.   The   entire   vehicle   must be  placed  under  cover  and warmed   until   fuel   returns   to   a   li- quid   state. (3)   Remove   fuel   cell   drain   plugs   from bottom   of   hull   and   drain   fuel. (4)   When   fuel   cell   is   drained,   install drain   plugs   and   tighten   securely. 3 - 54







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