TM 5-4310-451-141-13. ENGINE.The engine for this air compressor unit is a Detroit Diesel, six-cylinder, two-cycle engine. For information onengine technical principles of operation, refer to TM 9-8000.1-14. AIR COMPRESSOR ASSEMBLYa.General.(1)The air compressor assembly is a single stage,positive displacement, flood lubricated type whichprovides continuous pulse-free compression.(2)Oil is injected into the air compressor and mixesdirectly with the air as the rotors turn, compressing theair.(3)The oil flow has three primary functions:(a)As a coolant, it controls the rise of airtemperature normally associated with theheat of compression.(b)Seals the leakage paths between therotors and stator, and also between therotors them- selves.TYPICAL CROSS-SECTION(c)Acts as a lubricating film between the rotors, allowing one rotor to directly drive the other, which acts as anidler.(4)After the air/oil mixture is discharged from the air compressor, the oil is separated from the air. At this time, the airflows to the service line and the oil is cooled in preparation for reinjection.TA7046791-13
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