TM 9-4310-397-142-5. OPERATINGPROCEDURES. - ContinuedFigure 2-3. Unit Operation, Usual(6)Depress SAFETY BYPASS switch (6) and hold. Pull IGNITION-START switch (4) and release whenengine starts. When pressure is indicated on ENGINE OIL PRESSURE gauge (7) release SAFETYBYPASS switch (6).(7)If engine oil pressure does not register within three seconds after engine starts, release SAFETY BYPASSswitch (6), push IGNITION-START switch (4) in and notify supervisor.(8)When engine water temperature reaches 140° F (60° C), as indicated on ENGINE WATER TEMPeraturegauge (8), close the hose reel valve (1) and double discharge valve (2) and turn COMPRessorUNLOADER AND IDLE CONTROL knob (3) counterclockwise until it stops. This action increases enginespeed and opens compressor intake valve to start compression.CAUTIONOperating the equipment unattended for prolonged periods of time can result in seriousdamage to the unit.(9)Unit is now ready for use and will cycle through load and unload automatically in relation to air demand.As demand increases, the engine will accelerate and the compressor will replenish compressed air supplyin the separator tank. As demand decreases, or stops, engine will return to idle and compressor will run inan unloaded condition until demand for air again causes unit to load.(10)Perform all the DURING PMCS as outlined in table 2-1.2-28
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