Description Of Operation - Craftsman Air compressor Part List Manual

DESCRIPTION OF OPERATION
Air Compressor Pump: To compress air, the piston
moves up and down in the cylinder. On the downstroke, air
isdrawn inthrough the air intake valves. The exhaust valves
remain closed. On the upstroke of the piston, air is
compressed. The intake valves close and compressed air is
forced out through the exhaust valves, through the outlet
tube, through the checkvalve and intothe air tank. Working
air is not available until the compressor has raised the air
tank pressure above that required at the air outlet.
Check Valve: When the air compressor is operating, the
check valve is "open", allowing compressed air to enter
the air tank. When the air compressor reaches "cut-out"
pressure, the check valve "closes", allowing air pressure
to remain inside the air tank.
Pressure ReleaseValve: The pressure release valve located
on the side of the pressure switch, is designed to automat-
icallyrelease compressed air from the compressorhead and
the outlet tube when the air compressor reaches "cut-out"
pressure or is shut off. If the air is not released, the motor
will not be able to start. The pressure release valve allows
the motor to restart freely. When the mQtor stops running,
air willbe heard escaping from the valve for a few seconds.
No air should be leaking when the motor is running.
Pressure Switch: The pressure switch automatically starts
themotorwhen the air tank pressure drops belowthe factory
set "cut-in" pressure. It stops the motor when the air tank
pressure reaches the factory set "cut-out" pressure.
SafetyValve: Ifthe pressure switch does notshutoffthe air
compressor at itscut-out press ure setting, the safety valve
will protect the tank against high pressure by =popping out"
at itsfactory set pressure (slightlyhigher than the pressure
switch cut-out setting).
Regulator: The air pressure coming from the air tank is
controlled by the regulator. Turn the regulator knob clock-
wise to increase pressure and counter-clockwise to de-
crease pressure. To avoid minor readjustment after
making a change in pressure setting, always approach
the desired pressure from a lower pressure. When
reducing from a higher to a lower setting, first reduce to
some pressure less than that desired, then bring up to the
desired pressure. Depending on the air requirements of
each particular accessory, the outlet regulated air pres-
sure may have to be adjusted while operating the acces-
sory.
Outlet Pressure Gauge: The outlet pressure gauge indi-
cates the air pressure available at the outlet side of the
regulator. This pressure is controlled by the regulator and
is always less or equal to the tank pressure. See
"Operating Procedures".
Tank Pressure Gauge: The tank pressure gauge indicates
the reserve air pressure in the tank.
Cooling System: This compressor contains an advanced
design cooling system.At the heartofthis cooling system is
an engineered fan. It is perfectly normal for this fan to blow
air through the vent holes in large amounts. You know that
the cooling system is working when air is being expelled.
Tools Needed for Assembly
• a 9/16" socket or open end wrench for attaching the wheels
• a 3/8" open end wrench or socket to tighten handle screws