Parts & Features - Craftsman 921.153120 Owner's Manual

Parts & Features
See figures below for reference.
Check Valve
When the pump is not in operation the valve closes to
retain air pressure inside the tank. An internal
component.
Quick Connect
Offers a quick release feature for
attaching and removing the air hose.
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.
Regulator
The air pressure coming from the air tank is
by the regulator. To increase the pressure turn the
knob clockwise and to decrease the pressure turn the I_---"__'--'_
knob counterclockwise.
| 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 _,
k pressure, j
Pressure Switch
On/Auto/Off Lever: Turn this lever to On/Auto to provide
power to the pressure switch. Turn lever to Off when
compressor is no longer in use.
Pressure Switch: The pressure switch automatically starts
the motor when the air tank pressure drops below the
factory set cut-in pressure. It stops the motor when the air
tank pressure reaches the factory set cut-out pressure.
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
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 Drain Valve
Used to drain condensation from the air tank.
Located at bottom of tank.