TM 3-4230-218-12&PSection IV.OPERATION UNDER UNUSUAL CONDITIONSOperation in unusualEmergencyProcedures . . . . ..2-12Weather Conditions. . . . . . 2-112-11. OPERATIONINUNUSUALWEATHER CONDITIONS.This paragraph contains procedures for the following:Operation in Extreme Heat and Different Altitudes (page 2-39)Operation in Freezing Weather (page 2-40)Shutdown in Freezing Weather (page 2-42)Storage in Freezing Weather (page 2-42.2)Thawing Procedures (page 2-42.4)Thawing Hoses and Accessories (page 2-42.5)Operation in High Scale Deposit Environments (page 2-42.5)Operation in Salt and High Humidity Areas (page 2-42.5).a.Operationin ExtremeHeatandDifferentAltitudes.Keep equipment shielded from hot rays ofarea when operating. Never position onedirected toward another unit.When operating at elevated temperatures,sun by moving into a shadedunit so that the exhaust isthe condition "vapor lock"may occur causing either the engine or burner unit to stop function-ing.Vapor lock is the forming of vapor or bubbles in the suctionfuel lines, thereby preventing fuel from flowing.If vapor lock is suspected with the burner and the burner is beingoperated on gasoline, switch to one of the alternate fuels specified.If vapor lock is suspected with the engine, try to cool the fuelcontainer by covering with a wet towel, and start fuel flow by pump-other rubber components once aRubber deteriorates rapidly inChange 12-39
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