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Summary:PENNSYLVANIA POWER & LIGHT: DIAGRAMS OF AIR COMPRESSORS. GYRO-FLO. MAN POINTS TO PARTS ON YELLOW MACHINE. CHECKING OIL LEVEL. DIP STICK. GAUGE. CHECKING OIL PAN. ENGINE RADIATOR. REMOVES CAP. PREVENTIVE MAINTENANCE. WRENCH. MECHANIC. DRAINING OIL. THE END.