TM 5-4320-300-142-8.OPERATION IN HIGH ALTITUDESThe operating efficiency of the engine diminishes at higher altitudes. Ensure that engine is operating at peak efficiency.2-9.OPERATION IN SANDY OR DUSTY AREASa.When pump is operated under sandy or dusty conditions, check restriction indicator and service air cleaner morefrequently.(1)To clean air filter, loosen clamp assembly that secures cup assembly to body assembly. Remove baffle assembly and empty dust from the cup assembly.NOTEDo not allow dust to build up in cup assembly. Empty more frequently when operating under dustyconditions.(2)Wipe cup assembly and baffle assembly clean using damp cloth. Unscrew the wing nut and carefully remove the element from body assembly. Wipe the inside of the body assembly clean with a damp cloth. Tap element against palm to loosen larger dirt particles. If filter element must be reused, gently tap filter element against the palm of your hand. Install new filter element when available.CAUTIONThe slightest break in the air cleaner filter element will admit enough airborne dirt to cause rapidfailure of piston rings.(3)Inspect air filter element for breaks, holes, or damaged gasket.2-62
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