Craftsman 921.166390 - Manual (Page 5)

Parts & Features
See figures below tor reference.
Air Intake Filter
Provides dean air to the pump and must always
be kept free ot debris. Check on a daily basis or
before each use,
Regulator Gauge
Indicates the outgoing air pressure to the tool and is
controlied by the regulator.
Tank Pressure Gauge
Indicates the reserve air pressure in the tank.
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 cuPout
pressure. The released air should
only escape momentarily and the
valve should then close.
Tank Drain Valve
Used to drain condensation from the
air tank, Located at bottom of tank.
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.
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.
Quick Connect
Offers a quick release feature for attaching and removing the
air hose.
Check Valve
When the pump is not in operation, the valve closes to retain
air pressure inside the tank. An interna! component.