TM 5-4310-452-141-16. LUBRICATION SYSTEM (Con't).KeyComponentDescription1Inlet Air CleanerPrevents foreign particles such as dirt and water from being inducted into thecompressor air inlet.2Air ActuatingActs in unison with the pressure regulator to adjust the engine governor to loadGovernor Controldemand.3CompressorA positive displacement, helical-type compressor consisting of two, one-piecemeshing helical rotors within a compression chamber. Operating at high speedwithin a tight casing, the rotors draw air in from the top inlet, compress it axially, anddischarge it from the bottom at the opposite end. Cooled oil is injected into thecompression chamber under controlled pressure to cool the air, seal the rotorclearances, and lubricate the rotor surfaces. Pressure lubrication is also supplied tothe gears and bearings. The oil which mixes with the air during compression passesinto the oil separator.4Unloader ValveControls the compressor capacity by throttling the volume of air admitted to theAssemblycompressor. Unloader valve assembly is air-operated.5Oil CoolerCools compressor lubricating and cooling oil to prevent over-heating of thecompressor.6Oil TemperatureRegulates cooling and lubricating oil flow to partially bypass the oil cooler when oilBypass Valveis cold. Valve modulates oil flow between bypass and oil cooler to maintain anoptimum oil temperature.7Oil Filter AssemblyRemoves foreign particles from the compressor lubricating and cooling oils.8Manual Blowdown Valve The hand-operated valve can relieve the oil separator system of all pressure. Useonly if the safety relief valve does not work,9Safety Relief ValveReleases compressed air from the oil separator system to the atmosphere when airpressure exceeds 150 psi (1034 kPa).10Oil SeparatorReceives compressed air and oil mist from the compressor. Most of the oilimmediately falls to the bottom of the oil separator tank. Any oil remaining in the airis removed by the oil separator. In addition to lubricating and cooling oils, the oilseparator stores compressed air. The pressure of the compressed air in the oilseparator tank is indicated by the discharge pressure gage.11Automatic BlowdownVents compressed air from the oil separator to the atmosphere when the engine isValveturned off.12Regulating ValveAutomatically regulates engine speed and air volume passing through the inletunloader valve by sensing air pressure in the oil separator system and actingpneumatic cylinder.13Minimum PressureEnsures that excess lubricating and cooling oil is not drawn into the air service linesand Service Valveby closing automatically when the pressure in the oil separator system drops below75 psi (517 kPa).1-17
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