Craftsman 921.164780 Owner's Manual download pdf (Page 5)

Parts & Features

See figures below for reference.

Pressure Relief Tube

Outlet Tube

Oil Sight Gauge

Oil Fill Cap

Pressure Switch

This controls the power to the motor and also the cut-in/

cut-out pressure settings. This switch serves as the

Auto/Off positions for the unit.

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.

Regulator Gauge

Indicates the outgoing air pressure

to the tool and is controlled by

the regulator.

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.

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 internal component.

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.

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.

Tank Pressure Gauge

Indicates the reserve air pressure in the tank.

Tank Drain Valve

Used to drain condensation from the air tank.

Located at bottom of tank.

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Craftsman 921.164780 Owner's Manual Page 5

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