TM 5-4310-452-142-21. OPERATION IN SALT AIR AND SEA SPRAY.a.Operations in salt air and sea spray can be damaging to the unit because of saltwater's corrosive effects. Beparticularly aware of the potential for rust.b.Check twice daily for water in the oil of both the engine and the compressor.c.Drain the fuel/water separator whenever water is visible in the sightbowl (see paragraph 3-6).d.Keep the engine throttle control cylinder rod clean and free of rust.2-22. OPERATION AT HIGH ALTITUDES.a.Due to the thinner air at higher altitudes, the unit will operate at reduced capacity (i.e., the higher the altitude, thelower the capacity). This means the engine will produce less power and the compressor will have less air to compress; itwill take longer to arrive at operating pressure; and it will be slower to replenish.b.Since the engine and compressor of this unit are air-cooled, operating temperatures may increase.CAUTIONDO NOT turn off the unit If It overheats. Turning It off will stop the flow of cooling air throughthe unit.c.Frequently check the COMPRESSOR OIL TEMP gage. If the unit overheats, stop the use of all tools and allowthe unit to run, unloaded, until it cools down to a more acceptable operating temperature, 185°F (85°C).2-23. FORDING.CAUTIONTo prevent severe damage and contamination of internal components, DO NOT ford this unit inwater with a depth greater than 30 in. (76 cm).a.BeforeFording.(1)Ensure that all filler caps, plugs, and valves are closed and secure.(2)Probe the area to be forded with a stick, and thoroughly check to ensure that there are no sudden dropoffs,boulders, or potholes which could overturn or damage the unit.(3)Do not attempt to ford an area that has a swift current, high banks, or overhanging trees or boulders thatappear to be in danger of toppling.b.DuringFording.(1)At a safe operating speed, carefully move across the area to be forded.(2)Do not stop or attempt to back up.c.AfterFording.(1)Check oil levels of engine and compressor, and test for water. If oil levels are too high, water has enteredand the oil must be replaced (see LO 5-4310-452-12).(2)Open housing and wipe off water from the engine and compressor components.(3)Wipe dry and/or allow time to dry, all electrical components and wires, (4) When you move on, lightly applythe brakes to aid in drying. If brakes malfunction after fording and drying, notify your supervisor,2-30
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