ARMY   TM   9-2805-262-14 AIR  FORCE  TO  38G2-90-1 NAVY   NAVFAC   P-8-613-14E Section IV. OPERATION UNDER UNUSUAL CONDITIONS Paragraph Page 2-11 Operation in Dusty or Sandy Areas.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-11 2-12 Operation in Rainy, Humid, or SaIt Air Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2-13 Operation in Extreme Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . ...2-11 2-14 Operation at Different Altitudes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . ...2-11 2-15 Operation in Extreme Cold . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . ...2-12 2-11. Operation in Dusty or Sandy Areas. The procedures for operating the engine are the same as under  usual  conditions  except  for  the  following  special  precautions: a. Keep fuel, lubrication, ignition and cooling systems free of dust and  sand. b. Check aircleaner indicator more often when operating in dusty or sandy areas. Have unit maintenance service  air  cleaner  element  as  needed. c. In the event of severe dust or sand storms, provide a well protected sheltering device for the engine. d. Remove all dust or sand from the engine and inspecl for damage. 2-12. Operation in Rainy, Humid, or Salt Air Conditions. The procedures for operating the engine are the same as under usual conditions except for the following special precautions: a. b. c. d. 2-13. Remove all visible signs of corrosion as soon as possible. Keep fuel lines, and ignition lines as dry as possible. If  possible,  store  engine  indoors. Use a thin layer of oil or desiccants to keep corrosion to a minimum. Operation in Extreme Heat.  The procedures for starting and operating are the same as under usual conditions  except  for  the  following  special  precautions: a. b. c. d. Check oil level more often when operating in extreme heat. Use appropriate grade oil per LO 9–2805–262-12. Allow engine to cool off longer after removing end item load. In extreme hot temperatures, the engine will run efficiently but at a reduced horse power rating. For each 10°F (12.2°C) above 60°F (15.5°C), a 1 percent loss of power should be expected. 2-14. Operating at Different Altitudes. The procedures for operating the engine are the same as under usual conditions. The engine will operate at altitudes of up to 5000 feet above sea level but at a reduced horse power rating. For every 1000 feet above sea level, a 3.5 percent power loss should be expected. 2-11