TM 5-4320-302-142-8. OPERATION IN EXTREME HEATThe engine of the centrifugal pump unit is air cooled. Heat is removed from the engine in three ways: engine exhaust,engine oil, and the passage of ducted air across and through cylinder cooling fins. Therefore, when operating in highambient temperatures, observe the following:a. Exhaust Valve. Be sure that exhaust valve moves easily and does not restrict the outflow of exhaust gases morethan absolutely necessary. Exhaust valve should be checked to be sure that when engine is not in operation it closes toprotect exhaust system from entry of debris and/or rain.b. V-Belt. Be sure that V-belts driving air blower assembly are properly adjusted and drive air blower withoutslipping. Check V-belts through screen on V-belt guard.2-63
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