Craftsman 921.166400 - Manual (Page 5)

Parts & Features
See figures below for reference.
r
V
Tank Pressure Gauge
Indicates the reserve air pressure in the tank
Regulator Gauge
Indicates the outgoing air pressure to the
tool and is controlled by the regulator.
Quick Connect
Offers a quick release feature for
attaching and removing the air hose.
Regulator
The air pressure coming from the air
tank is controlled by the regulator.
To Increase the pressure, turn the
knob clockwise and to decrease the
pressure turn the knob
counterclockwise.
Tank Safety Valve
Used to allow excess tank pressure
to escape into the atmosphere. This
valve should only open when the
tank pressure is above the
maximum rated pressure.
Air Intake Filter
Provides clean air to the pump and must always
be kept free of debris. Check on a daily basis or
before each use.
Pressure Switch
This controls the power to the motor and also
the cut-in/cut-out pressure settings. This switch
serves as the Auto-On/Off positions for the unit.
Pressure Relief Valve
The pressure relief valve, located on
the side of the pressure switch, is
designed to automatically release
compressed air when the air
compressor reaches cut-out
pressure. The released air should
only escape momentarily and the
valve should then close.
Pressure Relief Tube
Check Valve
When the pump is not in operation, the valve closes to retain
air pressure inside the tank. An internal component.