Description Of Operation; Assembly - Craftsman 919.152921 Owner's Manual

DESCRiPTiON OF OPERATION
Air Compressor Pump: To compress air, the piston
moves up and down in the cylinder. On the downstroke,
air isdrawn in through the air intake valves. The exhaust
valves remain closed. On the upstroke of the piston, air
is compressed. The intake valves close and com-
pressed air is forced out through the exhaust valves,
through the outlet tube, through the check valve and into
the air tank. Working air is not available until the
compressor has raised the air tank pressure above that
required at the air outlet.
CheckValve: When the air compressor isoperating, 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 Release Valve: The pressure release valve
located on the side of the pressure switch, is designed
to automatically release compressed air from the com-
pressor head and the outlet tube when the air compres-
sor 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 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 the air tank pressure reaches the factory set "cut-
out" pressure.
SafetyValve: If the pressure switch does not shut offthe
air compressor at its cut-out pressure setting, the safety
valve will protect the tank against high pressure by
"popping 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
clockwise to increase pressure and counter-clockwise
to decrease pressure. To avoid minor readjustment
after making a change in pressure setting, always ap-
proach 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 pressure may have to be adjusted while
operating the accessory.
Outlet Pressure Gauge: The outlet pressure gauge
indicates the air pressure available at the outlet side of
the regulator. This pressure is controlled by the regula-
tor and is always less or equal to the tank pressure. See
"Operating Procedures".
Tank Pressure Gauge: The tank pressure gauge indi-
cates the reserve air pressure in the tank.
Cooling System: This compressor contains an ad-
vanced 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.
ASSEMBLY
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
installing Wheels, Handle, Rubber
Foot Strip
1.
THE WHEELS AND HANDLE DO NOT PRO=
ViDE ADEQUATE CLEARANCE, STABILITY
OR SUPPORT FOR PULLING THE UNIT UP
AND DOWN STAIRS OR STEPS. THE UNIT
MUST BE LIFTED, OR PUSHED UP A RAMP.
Attach the handle to the compressor saddle by
inserting the handle inside the compressor saddle
and lining upthetwo bolt holes on each side. Install
the four screws, two on each side. Tighten securely.
2.
3.
It will be necessary to brace or support one
side of the outfit when installing the wheels
because the compressor will have a ten=
dency to tip.
Install one shoulder bolt and one nut for each wheel.
Tighten securely. The outfit will sit level if the wheels
are properly installed.
Clean and dry underside of air tank leg opposite
wheels. Remove the protective paper strip from the
adhesive backed rubber foot strip. Attach the rub-
ber foot strip to the bottom of leg. Press firmly into
place.