Sears 921.16471 User Manual
Owner's Manual
iCRRFT$14RN i
AIR COMPRESSOR
26-gallon
1.5 HP
Oil-Free, Direct Drive
Model No. 921.164710
R#°
CA UTION:
Before using this product, read this
manual and follow all its Safety
Rules and Operating Instructions.
Sears Brands Management Corporation, Hoffman Estates, IL 60179 U.S.A.
www.sears.com/craftsman
9/08/2011
Part No. 101-3344
• Safety Instructions
• Installation & Operation
• Maintenance & Storage
• Troubleshooting Guide
• Parts List
TABLE OF CONTENTS
Page
Warranty ................................................................ see below
Safety Symbols ................................................................... 3
Important Safety Instructions & Guidelines .............................................. 3
Specifications .................................................................... 4
Glossary ........................................................................ 4
Duty Cycle ....................................................................... 4
Parts & Features .................................................................. 5
Installation & Assembly ............................................................. 6
Operating Procedures .............................................................. 7
Maintenance ..................................................................... 8
Storage ......................................................................... 8
Troubleshooting Guide ............................................................. 9
Exploded View .................................................................. 10
Parts List ...................................................................... 12
Service Number ........................................................... back cover
CRAFTSMAN ONE YEAR FULL WARRANTY
FOR ONE YEAR from the date of purchase, this product is warranted against any defects in material or
workmanship. Defective product will receive free repair or free replacement if repair is unavailable For
warranty coverage details to obtain repair or replacement, visit the web site: www.craftsman.com This
warranty does not cover the air filter or drive belt, which are expendable parts that can wear out
from normal use within the warranty period.
This warranty is void if this product is ever used while providing commercial services or if rented to
another person.
This warranty gives you specific legal rights, and you may also have other rights which vary from state
to state.
Sears Brands Management Corporation, Hoffman Estates, IL 60179 U.S.A.
Safety Instructions
The information listed below should be read and
understood by the operator, This information is
given to protect the user while operating and stor-
Indicates an imminently hazardous situation
which, if not avoided, will result in death or seri-
ous injury.
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Indicates a potentially hazardous situation
which, if not avoided, could result in death or
serious injury.
ing the air compressor. We utilize the symbols
below to allow the reader to recognize important
information about their safety.
W_,.TmJl_e];l
Indicates a potentially hazardous situation
which, if not avoided, may result in minor or
moderate injury.
When used without the safety alert symbol indi-
cates a potentially hazardous situation which, if
not avoided, may result in property damage,
Important Safety Instructions and Guidelines
• Save all instructions
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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
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Risk of Movin_l Parts
Risk of Burns
used. Always use more air hose before utilizing extension cords. All exten-
sion cords used must be 12 gauge with a maximum length of 25 ft. The
circuit fuse type must be a time delay. Low voltage could cause damage to
the motor.
If the air compressor is in operation, all guards and covers should be
attached or installed correctly. If any guard or cover has been damaged,
do not operate the equipment until the proper personnel has correctly re-
paired the equipment. The power cord should be free of any moving parts,
twisting and/or crimping while in use and while in storage.
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 normally hot during and after
operation.
Risk of Falling
Risk fr_Objects
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 Z87.1 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.
3
Important Safety Instructions & Guidelines
Risk to Breathing
Risk of Electrical Shock
Risk of
Explosion or Fire
Risk of Bursting
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 the area of operation. This air compressor does
not provide breathable air for anyone or any auxiliary breathing device.
Spraying material will always need to be in another area away from the air
compressor to not allow intake air to damage the air compressor filter.
Never utilize the air compressor in the rain or wet conditions. Any electrical
issues or 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.
Never operate the compressor near combustible materials, gasoline or
solvent vapors. If spraying flammable materials, locate the air compressor
at least 20 feet away from the spray area. Never operate the air compres-
sor 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 com-
pressor 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-Free, Direct Drive
Motor ............................ 1.5 HP
Bore ............................... 2.48"
Stroke .............................. 0.87"
Voltage Single Phase .............. 120 VAC
Minimum Circuit Requirement ....... 15 Amps
Air Tank Capacity ................ 26 Gallons
Cut-in Pressure ................... 120 PSI
Cut-out Pressure .................. 150 PSI
SCFM @ 90 PSI ....................... 3.8
SCFM @ 40 PSI ....................... 5.1
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.
Cut-Out Pressure: The point at which the motor
stops when the tank has reached maximum
air pressure.
Code Certification: Products that bear one or more
of the following marks: UL, CUL, ETL, CSA,
have been evaluated by OSHA-certified
independent safety laboratories and meet
the applicable Underwriters Laboratories
Standards for Safety.
Duty Cycle
This is a 50% duty cycle air compressor. Do not run the air compressor more than 30 minutes of
one hour. Doing so could damage the air compressor.
4
Parts & Features
See figures below for reference
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 pressure.
Tank Pressure Gauge
Indicates the reserve air
pressure in the tank.
I Regulator Pressure Gauge
Indicates the outgoing air pressure to _.
the tool and is controlled by the regulator.J
Quick Connect
Offers a quick release feature for attaching
and removing the air hose.
Regulator
The air pressure coming from the air tank is
controlled by the regulator. To increase the pressure,
turn the knob clockwise, and to decrease the
pressure, turn the knob counter-clockwise.
Provides clean air to the pump
and must always be kept free of
debris. Check on a daily basis or
I Air Intake Filter
before each use.
I
Outlet
Tube
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
positions for the unit.
F
The pressure relief valve located on the
side of the pressure switch, is designed to
automatically release compressed airwhen
the air compressor reaches cut-out
pressure. The released air should only
I Pressure Relief Valve !
escape momentarily and the valve should
then close.
k.
• .... ...... II Pressure
[!_Cs__)/_ Relief Tube
Used to drain condensation from the air tank.
I Tank Drain Valve 1
Located at bottom of tank.
When the pump is not in operation the valve
closes to retain air pressure inside the tank. An
I heck Valve
internal component.
I
5
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 information,
Getting Started -
Location of the Air Compressor
The air compressor should 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 daily basis to make sure it is clean
and in working order.
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Risk Of Fire Or Explosion
This product incorporates snap action switch
contacts and a universal electric motor which
tend to produce arcs and sparking and therefore
should not be exposed to flammable liquids or
vapors. This product is not intended for instal-
lation or use in a commercial garage or shop
environment.
Grounding Instructions
This product must be grounded. In the event of
an electrical short circuit, grounding reduces the
risk of electric shock by providing an escape wire
for the electric current. This product is equipped
with a cord having a grounding wire with an ap-
propriate grounding plug. (See the figure below.)
The plug must be plugged into an outlet that is
properly installed and grounded in accordance
with 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.
Plug
Grounded
Outlet
Grounding Pin
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Improper installation of the grounding plug will result in a risk of electric shock, If repair or replace-
ment 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 will 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 that the
product is connected to an outlet having the same configuration as the plug. No adapter should 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.
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 No. 12 AWG size must be used. An undersized cord will cause a drop in
line voltage resulting in loss of power and overheating.
Break In Procedures
No break in procedure is required by the user. This product is factory tested to ensure proper opera-
tion and performance.
6
Operating Procedures
Daily Start-Up Procedures
1. Set the Auto/Off switch to the Off position.
2. inspect the air compressor, air hose, and any
accessories/tools being used for damage or
obstruction, if any of these mentioned items
are in need of repair/replacement, contact
your local authorized dealer before use.
3. Close the drain valve.
4. Connect the air hose to the quick connect
socket on the regulator assembly by inserting
the quick connect plug on the air hose into
the quick connect socket. The quick connect
socket collar will snap forward and lock
the plug into place providing an air tight seal
between the socket and plug. To release the
air hose push the collar back on the quick
connect socket.
5. Plug the power cord into the proper receptacle.
6. Turn the Auto/Off switch to the Auto
position and the compressor will start and
build air pressure in the tank to cut-out
pressure and then shut off automatically.
7. Adjust the regulator to a PSi setting that is
needed for your application and be sure it is
within the safety standards required to
perform the task. if using a pneumatic tool,
the manufacturer should have recommendations
in the manual for that particular tool on
operating PSi settings.
8. The air compressor is now ready for use.
®
Daily Shut-Down Procedures
1. Set the Auto/Off switch to the Off position.
2. Unplug the power cord from the receptacle.
3. Set the outlet pressure to zero on the regulator.
4. Remove any air tools or accessories.
5. Open the drain valve allowing air to bleed
from the tank. After all of the air has bled from
the tank, close the drain valve to prevent
debris buildup in the valve.
CLOSED _ _ OPEN
When draining the tank, always use ear and eye
protection. Drain the tank in a suitable location;
condensation will be 3resent in most cases of
draining.
Water that remains _n the tank during storage
will corrode and weaken the air tank which could
cause the tank to rupture. To avoid serious
injury, be sure to drain the tank after each use
or daily.
7
Maintenance
NOTE: Any service procedure not covered in the maintenance schedule should be performed
by qualified service personnel.
The air compressor should be turned off,
unplugged from the power source, air bled from
the tank and allowed time to cool before any
maintenance is performed.
Check the safety valve by performing these three
steps:
1. Plug the compressor in and run until shut-off
pressure is reached.
2. Wearing safety glasses, pull out on the safety
valve ring to release pressure from the tank.
3. The safety valve should close automatically at
approximately at 40-50 PSI. Ifthe safety valve
does not allow air to be released when you pull
out on the ring, or does not close automatically, it
must be replaced.
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Do not attempt to remove or adjust the safety valve.
From time to time, the air filter needs to be removed
and cleaned,
1, Turn the air compressor off,
2, Unplug the air compressor,
3, Turn the air filter cover counterclockwise to
remove.
4. Remove air filter from air filter housing.
5. Blow compressed air through the air filter for
10-15 seconds.
Items to Check/Change
Check Tank Safety Valve
Overall Unit Visual Check
Drain Tank
Check Power Cord for Damage
NOTE: The motor will automatically restart
without warning if the unit is left plugged in to an
outlet with the Auto/Off switch in the on position.
Before each use
or daily
X
X
X
X
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To ensure efficient operation and longer life of
the air compressor unit, a routine maintenance
schedule should be followed. The following
schedule is geared toward a consumer whose
compressor is used in a normal working environ-
ment on a daily basis.
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This compressor is equipped with an automatic
reset thermal overload protector which will shut
off motor if it becomes overheated. If the thermal
overload protector is actuated, the motor must
be allowed to cool down before start-up is pos-
sible.
For more details, see Troubleshooting Guide
(page 9),
Storage
For storing the air compressor, be sure to do the following:
1, Turn the unit off and unplug the power cord 4. Open the drain valve to bleed all air from the tank.
from the receptacle, 5, Close the drain valve,
2, Remove all air hoses, accessories, and air tools 6, Store the air compressor in a clean and dry
from the air compressor, location,
3, Perform the daily maintenance schedule,
8
Troubleshooting Guide
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The air compressor should be turned off and unplugged from the power source before any mainte-
nance is performed as well as the air bled from the tank and the unit allowed time to cool. Personal
injuries could occur from moving parts, electrical sources, compressed air, or hot surfaces.
PROBLEM POSSIBLE CORRECTION
Air leaks at the check A defective check valve results in a constant air leak at the pressure relief
valve or at the pres- valve when there is pressure in the tank and the compressor is shut off.
sure relief valve. Drain the tank, then remove and clean or replace the check valve.
Air leaks between Be sure of proper torque on head bolts. If leak remains, contact a service
head and cylinder, technician.
Air leak from safety
valve.
Pressure reading on
the regulated pressure
gauge drops when an
accessory is used.
Excessive tank pres-
sure.
Motor will not start.
Thermal overload
protector cuts
out repeatedly.
Excessive moisture in
the discharge air.
Operate the safety valve manually by pulling on the ring. If the valve con-
tinues to leak when in the closed position, it should be replaced.
If there is an excessive amount of pressure drop when the accessory is
used, replace the regulator.
NOTE:
Adjust the regulated pressure under flow conditions (while accessory is
being used). It is normal for the gauge to show minimal pressure loss
during initial use of the tool.
Move the Auto/Off lever to the Off position. If the unit doesn't shut off,
unplug it from the power source and contact a service technician.
Make sure power cord is plugged in and the switch is on. Inspect for the
proper size fuse in your circuit box. If the fuse was tripped, reset it and
restart the unit. If repeated tripping occurs, replace the check valve or
contact a service technician.
Make sure the Thermal Overload Switch has not tripped. The motor has
a built in thermal cut out that trips when necessary to protect the motor
from damage when overheated.
To reset the motor overload toggle turn the pressure switch Auto/Off lever
to the Off position and unplug the unit from the power outlet. Allow 10
minutes (minimum) for motor overload cut-out to cool and reset. Unit can
then be plugged in and re-started.
1. Lack of ventilation, room temperature too high. Move to cooler
environment.
2. Excessive air usage, compressor too small for this application. Lower
rate of consumption.
Remove the water in the tank by draining after each use. High humidity
environments will cause excessive condensation. Utilize water filters on
your air line.
NOTE:
Water condensation is not caused by compressor malfunction. Be sure
the compressor's air output is greater than your tool's air consumption
rate.
Air leaks from the tank Never drill into, weld or otherwise modify the air tank or it will weaken.
body or tank welds. The tank can rupture or explode. Compressor cannot be repaired. Dis-
continue use of the air compressor.
9
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