DESCRIPTION OF OPERATION
Air Compressor Pump: To compress air, the pistons move
up and down in the cylinders. On the downstroke, air is
drawn in through the air intake valves. The exhaust valves
remain closed. On the upstroke of the piston, air is com-
pressed. The intake valves close and compressed air is
forced out through the exhaust valves, through the outlet
tubes, through the check valve and into the air tank. Work-
ing 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" pres-
sure, the check valve "closes", allowing air pressure to
remain inside the air tank.
Pressure Release Valve: The pressure release valve lo-
cated on the side of the pressure switch, is designed to
automatically release compressed air from the compressor
head and the outlet tube when the air compressor reaches
"cut-ont" 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 motor stops
running, air will be 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
the motor when the air tank pressure drops below the factory
set "cut-in" pressure. It stops the motor when tl_e air tank
pressure reaches the factory set "cut-out" pressure.
Globe Valve: Turn the knob counter-clockwise to open the
valve and clockwise to close.
Safety Valve: If the pressure switch does not shut off the
air compressor at its cut-out pressure setting, the safety
valve will protect the tank against high pressure by "pop-
ping out" at its factory set pressure (slightly higher 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 acces-
sory, the outlet regulated air pressure may have to be
adjusted while operating the accessory.
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 heart of this 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 9116" socket or open end wrench for attaching the wheels or removing shipping boards
• a 3/8" open end wrench or socket to tighten handle screws
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