Dewalt DXCMH1393075 Instruction Manual - Page 11
Air Tank Drain Valve, Throttle Control, Low Oil Shut Down Sensor
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English mined level. The valve is preset by the manufacturer and must not be removed or modified in any way. CHECK VALVE When the air compressor is operating, the check valve (O) is open, allowing compressed air to enter the air tank. When the air O compressor reaches cut-out pressure, the check valve closes, allowing air pressure to remain inside the air tank. AIR INTAKE FILTER A The filter (A) is designed to clean air entering the pump. To ensure the pump continually receives a clean, cool, and dry air supply the filter must always be clean and the filter intake must be free from obstructions. AIR TANK DRAIN VALVE The drain valve (H) is located at the base of the air tank and is used to drain condensation at the end of each use. See H Draining Air Tank under Maintenance. TANK PRESSURE GAUGE The tank pressure gauge (D) indicates the D reserve air pressure in the tank. GLOBE VALVE/AIR DISCHARGE VALVE: (sold separately, not shown) Opens and closes air distribution from compressor. REGULATOR (sold separately, not shown): An air pressure regulator or a separate air transformer which combines the functions of air regulation and/or moisture and dirt removal is recommended for most applications. AIR COMPRESSOR PUMP The pump compresses air into the air tank. Working air is not available until the compressor has raised the air tank pressure above that required at the air outlet. GASOLINE ENGINE The gasoline engine powers the pump. The engine drives a pulley and belt, which transfers power from the engine to the pump pistons via a flywheel and a crankshaft. The flywheel fan helps cool the pump. THROTTLE CONTROL When maximum air tank pressure is reached and the unloader valve vents air, it activates the throttle control on the engine. This gas saving feature holds the engine at a factory-set idling speed until air pressure in the air tank drops to reset pressure. The unloader valve then reactivates the throttle control and accelerates the engine to full throttle. LOW OIL SHUT DOWN SENSOR The air compressor engine is equipped with a low oil shutdown sensor. This is a safety device designed to protect your engine from damage in the event the oil level in the crankcase is below minimum. If the oil in the engine gets low while the air compressor is running it will automatically shut down the engine and will not restart until oil is added to the engine. If the oil is low before start-up, the engine will not start until oil is added. NOTE: The low oil shutdown sensor is very sensitive. You must fill the engine to the full mark on the dipstick to inactivate this safety device. 11
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