General Information; Description Of Operation; Installation And 8Reakqn Procedures; Location Of Air Compressor - Craftsman 919.175261 Owner's Manual

Youhavepurchased an
air compressor unit consist* spraying weed killers, insecticides, etc. An air pras-
ing of a 2 cy!inder, single stage air compressor pump, sure regulator is usually necessary for most of these
an ASME air tank, associated controls and instru- applications. Regulators can be purchased from most
ments. This air compressor must be permanently Sears stores or through the Sears General Catalog or
mounted in place. Power Toot Catalog.
Your aircompressor can be used foroperating paint
spray guns, air tooJs, cauJking guns, grease guns, air
brushes, eandblasterso inflating tires and pJastio toys,
Separate airtransformerswhich combine the func-
tions of sir regulation and/or moisture and dirt
removat should be used where applicable.
Air Compressor Pump: To compress air, the pistons
move up and down in the cy!inders. On the
downstroke, air is drawn in through the air intake
filter and then through the air intake valves. The
exhaust vatve remains closed. On the upstroke of the
piston, air is compressed. The intake valves close and
compressed airis forced out through the exhaust
valve, through the outlet tube, through the check
valve and into the air tank. Working air is not available
until the compressor has raised 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 "doses," eJlow-
ing air pressure to remain inside the air tank. If the air
is not unloaded, the motor will try to start, but vviil be
unable to. The check vane allows the motor to re-
start freeJy.
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 Release Valve: The pressure release vane is
designed to automatically release compressed air
from the compressor head and the outlet tube when
the air compressor reaches "cut-out = pressure or is
shut off. ff the air is not released, the motor will try
to start but will be unable to. The pressure release
valve allows the motor to restart freely. When the
motor stops running, air will be heard escaping for a
few seconds. No air should be heard leaking when the
motor is running.
Safety Valve: ff the pressure switch does not shut off
the air compressor at or near its cut-out pressure
setting, the safety valve will protect against high
pressure by "popping out" at its factory set pressure
(slighdy higher than the pressure switch cut-out
setting).
Location of the Air Compressor
Operate the air compressor in a clean, dry and we]]
ventilated area. The air intake filter must be kept dear
of obstructions which couJd reduce air delive_ of the
air compressor.The air compressor shouldbe located
at least 12" away from wales or other obstructions
that could interfere with the flow of air through the
fan bladed flywheel The air compressor crankcase
and head are designed wi_h fins to provide proper
cooling. If humidity is high, a Sears sir filter can be
installed on the air outlet adapter to remove exces-
sive moisture.
The air compressor shouJd be
as near to air outlets es
possible in order to avoid long pipe lines. Do not place
the air compressor where heat is excessive.