Parts & Features - Craftsman 921.153101 Owner's Manual

Parts & Features
See figures below for 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.
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.
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 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 ositions for the unit.
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.
Tank Drain Valve
Used to drain condensation from the air tank. Located at bottom of tank.
Pressure
Relief Tube
Oil Fill Cap
Outlet Tube
Oil Sight Gauge
Check Valve
When the pump is not in operation, the valve closes to retain air pressure inside the tank. An internal component.
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