Craftsman 921.153100 - Manual (Page 5)

Parts & Features
See figures below tor reference.
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.
Regulator Gauge
Indicates the outgoing air pressure to the tool and is controlled
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 vaive iocated on the
side of the pressure switch, is designed to
automatically release compressed air when
the air compressor reaches cut-out pressure.
The reieased air should only escape
momentarily and the valve should then close.
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.
R^ulator
me 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.
Tank Drain Valve
Used to drain condensation from the air tank. Located at bottom of tank.
Check Valve . . , *
When the pump is not in operation the valve closes to retain air pressure inside the tank. An internal component.