Craftsman 921166370 Owner’s Manual
Owner's Manual
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AIR COt
AIR COMPRESSOR
4-gallon
1HP
Oil Lubricated
Model No. 921.166370
CAUTION:
Before using this product,
read this manual and follow
all its Safety Rules and
Operating Instructions.
Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.
www.sears.com
3/2112005
Part No, E101375
o Safety instructions
• Installation & Operation
• Maintenance & Storage
° Troubleshooting Guide
• Parts List
• Espa_ol, p. 10
Table of Contents
Page
Warranty ................................................................................ See Below
Safety Symbols ............................................................................ 1
Important Safety instructions & Guidelines .......................................... 1
Specifications ............................................................................... 2
Glossary ................................................................................... 2
Duty Cycle ........................................................................ 2
Parts & Features ..................................................................... 3
Installation & AssembLy ;.................................................................... 4
Operating Procedures ....................................................................... 5
Detaching Unit from Dolly .............................................................. 6
Maintenance ............................................................................ 6
Storage ............................................................................... 6
Troubleshooting Guide ......................................................................... 7
Exploded View .............................................................................. 8
Parts List .......................................................................... 9
Espa_ot .......................................................................... 10
ONE YEAR FULL WARRANTY ON CRAFTSMAN AIR COMPRESSOR
If this Craftsman Air Compressor fails due to manufacturer's defects in material or workmanship
within one year of the date of purchase, RETURN IT TO THE NEAREST SEARS STORE OR
SERVICE CENTER IN THE UNITED STATES and it will be replaced or repaired (at our option),
free of charge,,
If this Air Compressor is used for commercial or rental purposes, this warranty applies for only 90
days from the date of purchase, This warranty gives you specific legal rights and you may also
have other rights which vary from state to state,,
Sears, Roebuck and Co,, Dept, 817WA,
Hoffman Estates, IL 60179
Safety Symbols
The information listed below should be read and understood by the operator° This information is given to protect the
user while operating and storing the air compressor°We utilizethe symbols below to allow the reader to recognize important
information about their safety**
Indicates an imminentlyhazardous situation which, if not
avoided, will result in death or serious injury_
Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury
Indicates a potentiaIfy hazardous situation which, if not
avoided, may result in minor or moderate injury
When used without the safety alert symbol indicates a
potentially hazardous situation which, if not avoided, may
result in property damage.
Important Safety Instructions and Guidelines
• Save all instructions
Improper operation or maintenance of this product could result in serious injury and/or property damage. Read and
understand all of the warnings and safety instructions provided before using this equipment.
The air compressor should be operated on a dedicated 15 amp circuit. If the circuit does
not have 15 free amps available, a larger circuit must be used. Always use more air
hose before utilizing extension cords. Att extension cords used must be 12 gauge with a
maximum length of 25 if. The circuit fuse type must be a time delay. Low voftage could
cause damage to the motor_
Risk of Moving Parts
If the air compressor is in operation, all guards and covers should be attached or
installed correctty_ If any guard or cover has been damaged, do not operate the
equipment until the proper personnelhas correctly repaired the equipment. The power
cord should be free of any moving parts, twisting and/or crimping while in use and while
in storage°
Risk of Burns
Risk of Falling
Riskfrom Flying Objects
There are surfaces on your air compressor that while in operation and thereafter can
cause serious burns if touched. The equipment should be allowed time to cool before
any maintenance is attempted° Items such as the compressor pump and the outlet tube
are normalty hot during and after operation°
Operation of the air compressor should always be in a position that is stable. Never use
the air compressor on a rooftop or elevated position that could allow the unit to fall or be
tipped over.Use additional air hose for elevated jobs°
Always wear ANSI Z87ol approved safety glasses with side shields when the air
compressor is in use. Turn off the air compressor and drain the air tank before
performing any type of maintenance or disassembly of the hoses or fittings_ Never point
any nozzle or sprayer toward any part of the body or at other people or animals,,
Important SafetyInstructions& Guidelines
Risk of Breathing Avoid using the air compressor in confined areas. Always have adequate space
(12 inches) on all sides of the air compressor° Also keep children, pets, and others out of
i_._,o the area of operation..This air compressor does not provide breathable air for anyone or
_2_: any auxiliary breathing device Spraying material will always need to be in another area
away compressor
from the air to not allow intake air to damage the air filter..
compressor
Risk of Never utilize the air compressor in the rain or wet conditions. Any electrical issues or
Electrical Shock repairs should be performed by authorized personnel such as an electrician and should
comply with all national and local electrical codes. The air compressor should also have
"__ the proper three prong grounding plug, correct voltage, and adequate fuse protection.
I
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Risk of Never operate the compressor near combustible materials, gasoline or solvent vapors. If
Explosion or Fire spraying flammable materials, locate the air compressor at least 20 feet away from the
Risk of Bursting
! '
k
spray area. Never operate the air compressor indoors or in a confined area
Always drain the air compressor tank daily or after each use. If the tank develops a leak,
then replace the air compressor. Never use the air compressor after a leak has been
found or try to make any modifications to the tank. Never modify the air compressor's
factory settings which control the tank pressure or any other function..
Specifications
Pump ................................ Oil-lube direct drive
Motor .................................... lt0 HP (Induction)
Bore ......................................................... 1..65"
Stroke ................................................. 1..26"
Voltage Single Phase ........................... 120 VAC
Minimum Circuit Requirement .................. 15 Amps
Air Tank Capacity ................................. 4 Gallons
Cut-in Pressure ...................................... 95 PSI
Cut-out Pressure .................................. 125 PSI
SCFM @ 90 PSI ........................................... 2.4
Oil Capacity ............................... 90 mL or 3 oz_
Oil Type .............................. SAE30 Non-detergent
Glossary
CFM: Cubic feet per minute.
SCFM: Standard cubic feet per minute; a unit of measure
for air delivery
PSIG: Pounds per square inch gauge; a unit of measure
for pressure.,
ASME: American Society of Mechanical Engineers.
California Code: Unit may comply with California Code
462 (I) (2)/(M) (2).,
Cut-In Pressure: The air compressor will automatically
start to refill the tank when the pressure drops
below the prescribed minimum.
Duty Cycle
This is a 50% duty cycle air compressor,
could damage the air compressor_
Do not run the air compressor more than 30 minutes of one hour.. Doing so
Cut-Out Pressure: The point at which the motor stops
when the tank has reached maximum air
pressure°
Code Certification: Products thatbear one or more of
the following marks: UL, ULc, ETL, CSA, have
been evaluated by OSHA-certified independent
safety laboratories and meet the applicable
Underwriters Laboratories Standards for Safety
Parts & Features
See figures below for reference_
i Regulator Gauge
Indicates the outgoing air pressure to the tool and is
controlled by the regulator..
When the pump is not in operation the valve closes to
retain air pressure inside the tank..An internal
I Check Valve
component.
'Tank Pressure Gauge
L Indicates the air pressure in the tank°
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
i
pressure.
Pressure Switch
This controls the power to the motor and also the
cut-in!cut-out pressure settings. This switch serves as
the Auto-On/Off positionsfor the uniL
reserve
Outlet Tube
f
Offers a quick release feature for
Quick Connect
attaching and removing the air hose°
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
closer
Pressure Relief Tube,
I Regulator
The air pressure coming from the air tank is controlled
by the regulator, To increasethe pressure turn the
knob clockwise and to decrease the pressure turn the
knob counterclockwise.,
Used to drain condensation from the air tank.
Tank Drain Valve t
Locatedat bottom of tank. .,
! eachAirIntake Filter
Provides clean air to the pump and must always be
kept free of debris. Check on a daily basis or before
use.
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I
Oil Fill Cap
Oil Sight
3
installation & Assembly
The air compressor should be turned off, unplugged from
the power source, the air bled from the tank and the unit
allowed time to cool before any maintenance is performed_
Personal injuries could occur from moving parts, electrical
sources, compressed air or hot surfaces. The quick connect
assembly must be attached before use. Failure to assemble
correctly could result in leaks and possible injury. If unsure
of assembly instructions or you experience difficulty in the
assembly please call your local service department for
further instruction..
Assembly
1. Remove air compressor, handle assembly, hardware,
oil bottle, intake filter, manual and accessories from
the styrofoam,
2.. Remove the plastic plug from the compressor intake
port° (seediagrambelow)
3.. Install the filter in the compressor intake port°
(see diagram below)
4_ Remove the oil fill cap from the crankcase and fill until
the oil reaches the top of the red dot in the sight glass.
Oil capacity is 3 oz. (seebelow)Use SAE-30 non-deter
gent (API CG/CD heavy duty motor oil)..Under extreme
cold weather conditions, 32° F (0°C) or below, use
SAE-10 weight oil,
5. Replace the oil cap..
6 Attach the handle to the frame with the saddle bolts
from the outside of the handle and the knobs on the
inside°
all local codes and ordinances_ Check with a qualified
electrician or service personnel if these instructions are not
completely understood or if in doubt as to whether the tool
is properly grounded_
__ rounded
Grounding Pin
Improper installation of the grounding plug will result in a
risk of electric shock,.If repair or replacement of the cord
or plug is necessary, do not connect the grounding wire to
either flat blade terminal. The wire with insulation having an
outer surface that is green with or without yellow stripes is
the grounding wire. Check with a qualified electrician or
serviceman if the grounding instructions are not completely
understood, or if in doubt as to whether the product is
properly grounded. Do not modify the plug provided,.
If it wil! not fit the outlet, have the proper outlet installed
by a qualified electrician.
This product is for use on a circuit having a nominal rating
of 120 volts and is factory-equipped with a specific electric
cord and plug to permit connection to a proper electric
circuit. Make sure the product is connected to an outlet
having the same configuration as the plug, An adapter
should not be used with this product. If the product must be
reconnected for use on a different type of electric circuit,
qualified service personnel should make the reconnection,
Gouttet
Estimated Assembly Time: Approximately 5 minutes
Getting Started - Location of the Air Compressor
The air compressorshould always be located in a clean,
dry and well ventilated environment. The unit should have
at minimum, 12 inches of space on each side, The air filter
intake should be free of any debris or obstructions,.
Check the air filter on a dally basis to make sure it is clean
and in working order,.
Grounding instructions
This product should begrounded. Inthe event of anelectrical
short circuit, grounding reduces the risk of electric shock by
providingan escape wire for the electric current°
This product is equipped with a cord having a grounding
wire with an appropriate grounding plug. (See the figure at
top right corner,.)The plug must be plugged into an outlet
that is properly installed and grounded in accordance with
Extension Cords
Use only a 3-wire extension cord that has a 3-blade
grounding plug and a 3-slot receptacle that will accept the
plug on the product. Make sure your extension cord is in
good condition. When using an extension cord, be sure to
use one heavy enough to carry the current your product will
draw°Cords must not exceed 25 feet and Noo12 AWG size
must be used. An undersized cord will cause a drop in tine
voltage resulting in loss of power and overheating_
Break In Procedures
No break in procedure is required by the user.
This product isfactory tested to ensure proper operation and
performance..
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