Sears 919.727321 User Manual
CRAFTSMAN
Model No.
OWNERS MANUAL FOR
CRAFTSMAN
PERMANENTLY LUBRICATED
919.727321
IMPORTANT:
Read the Safety Guidelines
and All Instructions Carefully
Before Operating
TANK MOUNTED
AIR COMPRESSOR
SAFETY GUIDELINES
ASSEMBLY
OPERATION
MAINTENANCE
TROUBLESHOOTING
REPAIR PARTS
Record in the spaces provided.
(1) The Model Number can be found on the
maintenance label on top of the motor
shroud or on the bar code label on the
rear of air tank.
(2) The Date Code Number can be found on
the bar code label on the rear of the air
tank.
(3) The Serial Number can be found on the
bar code label on the rear of the tank.
(4) The Tank Registration Number is located
on the metal data plate which is welded
onto the backside of the air tank. (This
data plate is painted the same color as the
tank.)
Retain these numbers for future reference.
Model No_______________________________
Serial No________________________________
Date Code_______________________________
Tank Registration No______________________
D20015 Rev. 1 6/28/00
Sold by Sears Canada, Inc., Toronto, Ont. M5B 2B8
TABLE OF CONTENTS
WARRANTY ......................................................... 2
SAFETY GUIDELINES ......................................... 2
WARNING CHART ............................................ 3-5
GENERAL INFORMATION ................................... 6
GLOSSARY .......................................................... 6
SPECIFICATION CHART ..................................... 7
DESCRIPTION OF OPERATION .......................... 7
TOOLS NEEDED FOR ASSEMBLY ...................... 7
ASSEMBLY .......................................................... 8
BREAK-IN PROCEDURES ................................... 8
Location of Air Compressor ............................ 8
Lubrication and Oil ......................................... 8
Grounding Instructions .................................... 8
Voltage and Circuit Protection ......................... 9
OPERATING PROCEDURES ....................................... 9
MAINTENANCE ........................................................... 10
Air Filter - Inspection and Replacement .................. 10
Check Valve -Replacement .................................... 10
Safety Valve - Inspection ........................................ 10
Motor ...................................................................... 10
Storage ................................................................... 10
TROUBLESHOOTING GUIDE ................................ 11-12
AIR COMPRESSOR DIAGRAM ................................... 14
PARTS LIST ................................................................. 15
COMPRESSOR PUMP DIAGRAM .............................. 16
PARTS LIST ................................................................. 17
SERVICE NOTES .......................................................... 18
HOW TO ORDER REPAIR PARTS ................ Back Cover
Break-in Procedure ......................................... 9
FULL ONE YEAR WARRANTY ON AIR COMPRESSORS
If this air compressor fails due to a defect in material or workmanship within one year from the date
of purchase, RETURN IT TO THE NEAREST SEARS SERVICE CENTER THROUGHOUT CANADA AND
SEARS WILL REPAIR IT, FREE OF CHARGE.
If this air compressor is used for commercial or rental purposes, the warranty will apply for ninety
days (90) from the date of purchase.
This Craftsman Air Compressor warranty gives you specific legal rights and you may have other
rights which vary from province to province.
Sears Canada, Inc., Toronto, Ont. M5B 2B8
SAFETY GUIDELINES - DEFINITIONS
This manual contains information that is important for you to know and understand. This information relates to protecting
YOUR SAFETY and PREVENTING EQUIPMENT PROBLEMS. To help you recognize this information, we use the symbols
to the right. Please read the manual and pay attention to these sections.
DANGER indicates an imminently hazardous situation which, if
not avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation which, if
not avoided, could result in death of serious injury.
CAUTION indicates a potentially hazardous situation which, if
not avoided, may result in minor or moderate injury.
CAUTION used without the safety alert symbol indicates a
potentially hazardous situation which, if not avoided, may result
in property damage.
D20015 Rev. 1 6/28/00
2 ENG
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
IMPROPER OPERATION OR MAINTENANCE OF THIS PRODUCT COULD RESULT IN SERIOUS INJURY AND PROPERTY
DAMAGE. READ AND UNDERSTAND ALL WARNINGS AND OPERATING INSTRUCTIONS BEFORE USING THIS EQUIPMENT.
HAZARD
RISK OF EXPLOSION OR FIRE
WHAT CAN HAPPEN
IT IS NORMAL FOR ELECTRICAL CONTACTS WITHIN THE
MOTOR AND PRESSURE SWITCH TO SPARK.
IF ELECTRICAL SPARKS FROM COMPRESSOR COME INTO
CONTACT WITH FLAMMABLE VAPORS, THEY MAY IGNITE,
CAUSING FIRE OR EXPLOSION.
RESTRICTING ANY OF THE COMPRESSOR VENTILATION
OPENINGS WILL CAUSE SERIOUS OVERHEATING AND
COULD CAUSE FIRE.
UNATTENDED OPERATION OF THIS PRODUCT COULD
RESULT IN PERSONAL INJURY OR PROPERTY DAMAGE.
RISK OF BURSTING
HOW TO PREVENT IT
ALWAYS OPERATE THE COMPRESSOR IN A WELL VENTILATED AREA FREE OF COMBUSTIBLE MATERIALS,
GASOLINE OR SOLVENT VAPORS.
IF SPRAYING FLAMMABLE MATERIALS, LOCATE COMPRESSOR AT LEAST 20 FEET AWAY FROM SPRAY AREA. AN
ADDITIONAL LENGTH OF HOSE MAY BE REQUIRED.
STORE FLAMMABLE MATERIALS IN A SECURE LOCATION
AWAY FROM COMPRESSOR.
NEVER PLACE OBJECTS AGAINST OR ON TOP OF COMPRESSOR. OPERATE COMPRESSOR IN AN OPEN AREA AT
LEAST 12 INCHES AWAY FROM ANY WALL OR OBSTRUC-
TION THAT WOULD RESTRICT THE FLOW OF FRESH AIR TO
THE VENTILATION OPENINGS.
OPERATE COMPRESSOR IN A CLEAN, DRY, WELL VENTILATED AREA. DO NOT OPERATE UNIT INDOORS OR IN ANY
CONFINED AREA.
ALWAYS REMAIN IN ATTENDANCE WITH THE PRODUCT
WHEN IT IS OPERATING.
AIR TANK: THE FOLLOWING CONDITIONS COULD LEAD TO A WEAKENING OF THE TANK, AND RESULT IN A
VIOLENT TANK EXPLOSION AND COULD CAUSE PROPERTY DAMAGE OR SERIOUS INJURY.
WHAT CAN HAPPEN
1. FAILURE TO PROPERLY DRAIN CONDENSED WATER
FROM THE TANK, CAUSING RUST AND THINNING OF THE
STEEL TANK.
2. MODIFICATIONS OR ATTEMPTED REPAIRS TO THE TANK.
3. UNAUTHORIZED MODIFICATIONS TO THE UNLOADER
VALVE, SAFETY VALVE, OR ANY OTHER COMPONENTS
WHICH CONTROL TANK PRESSURE.
4. EXCESSIVE VIBRATION CAN WEAKEN THE AIR TANK
AND CAUSE RUPTURE OR EXPLOSION.
ATTACHMENTS & ACCESSORIES:
EXCEEDING THE PRESSURE RATING OF AIR TOOLS, SPRAY
GUNS, AIR OPERATED ACCESSORIES, TIRES AND OTHER
INFLATABLES CAN CAUSE THEM TO EXPLODE OR FLY
APART, AND COULD RESULT IN SERIOUS INJURY.
DRAIN TANK DAILY OR AFTER EACH USE. IF TANK DEVELOPS A LEAK, REPLACE IT IMMEDIATELY WITH A NEW TANK OR
REPLACE THE ENTIRE COMPRESSOR.
NEVER DRILL INTO, WELD, OR MAKE ANY MODIFICATIONS
TO THE TANK OR ITS ATTACHMENTS.
THE TANK IS DESIGNED TO WITHSTAND SPECIFIC OPERATING
PRESSURES. NEVER MAKE ADJUSTMENTS OR PARTS
SUBSTITUTIONS TO ALTER THE FACTORY SET OPERATING
PRESSURES.
FOR ESSENTIAL CONTROL OF AIR PRESSURE, YOU MUST
INSTALL A PRESSURE REGULATOR AND PRESSURE GAUGE
TO THE AIR OUTLET OF YOUR COMPRESSOR. FOLLOW THE
EQUIPMENT MANUFACTURERS RECOMMENDATION AND
NEVER EXCEED THE MAXIMUM ALLOWABLE PRESSURE
RATING OF ATTACHMENTS. NEVER USE COMPRESSOR TO
INFLATE SMALL LOW-PRESSURE OBJECTS SUCH AS
CHILDREN’S TOYS, FOOTBALLS, BASKETBALLS. ETC.
3 ENG
HOW TO PREVENT IT
D20015 Rev. 1 6/28/00
HAZARD
RISK FROM FLYING OBJECTS
WHAT CAN HAPPEN
THE COMPRESSED AIR STREAM CAN CAUSE SOFT TISSUE
DAMAGE TO EXPOSED SKIN AND CAN PROPEL DIRT, CHIPS,
LOOSE PARTICLES AND SMALL OBJECTS AT HIGH SPEED,
RESULTING IN PROPERTY DAMAGE OR PERSONAL INJURY.
RISK TO BREATHING
WHAT CAN HAPPEN
THE COMPRESSED AIR FROM YOUR COMPRESSOR IS NOT
SAFE FOR BREATHING! THE AIR STREAM MAY CONTAIN
CARBON MONOXIDE, TOXIC VAPORS OR SOLID PARTICLES
FROM THE TANK.
HOW TO PREVENT IT
ALWAYS WEAR ANSI Z87.1 APPROVED SAFETY GLASSES
WITH SIDE SHIELDS WHEN USING THE COMPRESSOR.
NEVER POINT ANY NOZZLE OR SPRAYER TOWARD ANY
PART OF THE BODY OR AT OTHER PEOPLE OR ANIMALS.
ALWAYS TURN THE COMPRESSOR OFF AND BLEED PRESSURE FROM THE AIR HOSE AND TANK BEFORE ATTEMPTING
MAINTENANCE, ATTACHING TOOLS OR ACCESSORIES.
HOW TO PREVENT IT
ALWAYS OPERATE AIR COMPRESSOR OUTSIDE IN A CLEAN,
WELL VENTILATED AREA. AVOID ENCLOSED AREAS SUCH AS
GARAGES, BASEMENTS, STORAGE SHEDS, WHICH LACK A
STEADY EXCHANGE OF AIR. KEEP CHILDREN, PETS AND
OTHERS AWAY FROM AREA OF OPERATION.
NEVER INHALE AIR FROM THE COMPRESSOR EITHER
DIRECTLY OR FROM A BREATHING DEVICE CONNECTED TO
THE COMPRESSOR.
SPRAYED MATERIALS SUCH AS PAINT, PAINT SOLVENTS,
PAINT REMOVER, INSECTICIDES, WEED KILLERS, CONTAIN
HARMFUL VAPORS AND POISONS.
RISK OF ELECTRICAL SHOCK
WHAT CAN HAPPEN
YOUR AIR COMPRESSOR IS POWERED BY ELECTRICITY.
LIKE ANY OTHER ELECTRICALLY POWERED DEVICE, IF IT IS
NOT USED PROPERLY IT MAY CAUSE ELECTRIC SHOCK.
REPAIRS ATTEMPTED BY UNQUALIFIED PERSONNEL CAN
RESULT IN SERIOUS INJURY OR DEATH BY ELECTROCUTION.
ELECTRICAL GROUNDING: FAILURE TO PROVIDE ADEQUATE
GROUNDING TO THIS PRODUCT COULD RESULT IN SERIOUS
INJURY OR DEATH FROM ELECTROCUTION. SEE GROUND-
ING INSTRUCTIONS.
WORK IN AN AREA WITH GOOD CROSS-VENTILATION. READ
AND FOLLOW THE SAFETY INSTRUCTIONS PROVIDED ON
THE LABEL OR SAFETY DATA SHEETS FOR THE MATERIAL
YOU ARE SPRAYING. USE A NIOSH/MSHA APPROVED
RESPIRATOR DESIGNED FOR USE WITH YOUR SPECIFIC
APPLICATION.
HOW TO PREVENT IT
NEVER OPERATE THE COMPRESSOR OUTDOORS WHEN IT IS
RAINING OR IN WET CONDITIONS.
NEVER OPERATE COMPRESSOR WITH COVER COMPONENTS
REMOVED OR DAMAGED.
ANY ELECTRICAL WIRING OR REPAIRS REQUIRED ON THIS
PRODUCT SHOULD BE PERFORMED BY AUTHORIZED
SERVICE CENTER PERSONNEL IN ACCORDANCE WITH
NATIONAL AND LOCAL ELECTRICAL CODES.
MAKE CERTAIN THAT THE ELECTRICAL CIRCUIT TO WHICH
THE COMPRESSOR IS CONNECTED PROVIDES PROPER
ELECTRICAL GROUNDING, CORRECT VOLTAGE AND
ADEQUATE FUSE PROTECTION.
D20015 Rev. 1 6/28/00
4 ENG
HAZARD
RISK FROM MOVING PARTS
WHAT CAN HAPPEN
MOVING PARTS SUCH AS THE PULLEY, FLYWHEEL AND BELT
CAN CAUSE SERIOUS INJURY IF THEY COME INTO CONTACT
WITH YOU OR YOUR CLOTHING.
ATTEMPTING TO OPERATE COMPRESSOR WITH DAMAGED
OR MISSING PARTS OR ATTEMPTING TO REPAIR COMPRESSOR WITH PROTECTIVE SHROUDS REMOVED CAN
EXPOSE YOU TO MOVING PARTS AND CAN RESULT IN
SERIOUS INJURY.
RISK OF BURNS
WHAT CAN HAPPEN
TOUCHING EXPOSED METAL SUCH AS THE COMPRESSOR
HEAD OR OUTLET TUBES, CAN RESULT IN SERIOUS BURNS.
HOW TO PREVENT IT
NEVER OPERATE THE COMPRESSOR WITH GUARDS OR
COVERS WHICH ARE DAMAGED OR REMOVED.
ANY REPAIRS REQUIRED ON THIS PRODUCT SHOULD BE
PERFORMED BY AUTHORIZED SERVICE CENTER PERSONNEL.
HOW TO PREVENT IT
NEVER TOUCH ANY EXPOSED METAL PARTS ON COMPRESSOR DURING OR IMMEDIATELY AFTER OPERATION. COMPRESSOR WILL REMAIN HOT FOR SEVERAL MINUTES AFTER
OPERATION.
DO NOT REACH AROUND PROTECTIVE SHROUDS OR ATTEMPT
MAINTENANCE UNTIL UNIT HAS BEEN ALLOWED TO COOL.
RISK OF FALLING
WHAT CAN HAPPEN
A PORTABLE COMPRESSOR CAN FALL FROM A TABLE,
WORKBENCH OR ROOF CAUSING DAMAGE TO THE COM-
PRESSOR AND COULD RESULT IN SERIOUS INJURY OR
DEATH TO THE OPERATOR.
RISK OF PROPERTY DAMAGE WHEN TRANSPORTING
COMPRESSOR
(Fire, Inhalation, Damage to Vehicle Surfaces)
WHAT CAN HAPPEN
OIL CAN LEAK OR SPILL AND COULD RESULT IN FIRE OR
BREATHING HAZARD, SERIOUS INJURY OR DEATH CAN
RESULT. OIL LEAKS WILL DAMAGE CARPET, PAINT OR OTHER
SURFACES IN VEHICLES OR TRAILERS.
HOW TO PREVENT IT
ALWAYS OPERATE COMPRESSOR IN A STABLE SECURE
POSITION TO PREVENT ACCIDENTAL MOVEMENT OF THE
UNIT. NEVER OPERATE COMPRESSOR ON A ROOF OR
OTHER ELEVATED POSITION. USE ADDITIONAL AIR HOSE
TO REACH HIGH LOCATIONS.
HOW TO PREVENT IT
ALWAYS PLACE COMPRESSOR ON A PROTECTIVE MAT WHEN
TRANSPORTING TO PROTECT AGAINST DAMAGE TO VEHICLE
FROM LEAKS. REMOVE COMPRESSOR FROM VEHICLE
IMMEDIATELY UPON ARRIVAL AT YOUR DESTINATION.
ESW-99 9/26/99
5 ENG
D20015 Rev. 1 6/28/00
GENERAL INFORMATION
You have purchased an air compressor unit consisting
of a one cylinder, single-stage air compressor pump
and air tank. Included are wheels, regulator, gauges,
and handle.
This air compressor requires no oil. Now you can enjoy
all the benefits of having an air compressor without
ever having to purchase, add or change oil.
Your air compressor can be used for operating paint
spray guns, air tools, blow guns, nailers/staplers, air
brushes, and inflator kits. An air pressure regulator is
required for most of the applications.
GLOSSARY
CFM: Cubic Feet per Minute.
SCFM: Standard Cubic Feet per Minute; a unit of mea-
sure of air delivery.
PSI: Pounds per Square Inch; a unit of measure of pressure.
An inline air filter which removes moisture and dirt from
compressed air should be used where applicable.
An inline regulator can be used if a more precise
adjustment of air pressure is needed downstream.
Cut-Out Pressure: When you turn on your air compressor and it begins to run, air pressure in the air tank begins to build. It builds to a certain high pressure before
the motor automatically shuts off - protecting your air tank
from pressure higher than its capacity. The high pressure at which the motor shuts off is called “cut-out pressure.”
ASME: American Society of Mechanical Engineers; made,
tested, inspected and registered to meet the standards
of the ASME.
Cut-In Pressure: While the motor is off, air tank pressure drops as you continue to use your accessory. When
the tank pressure drops to a certain low level and the
pressure switch lever is in "Auto", the motor will restart
automatically. The low pressure at which the motor automatically restarts is called “cut-in pressure.”
SPECIFICATION CHART
Model No.
Bore
Stroke
Voltage - Single Phase
Minimum Branch Circuit Requirement
Fuse Type
Amperage at Maximum Pressure
Air Tank/Capacity
Approximate Cut-in Pressure
Approximate Cut-out Pressure
SCFM @ 40 psi
SCFM @ 90 psi
CSA: Electrical products sold in Canada are required to
be certified to the applicable CSA standard (s). Canadian
Standards Association (CSA) is a standards writing and
safety testing organization. Products that are CSA certified have been evaluated and tested and found to meet
or exceed the applicable CSA standard (s) for safety and
electrical performance.
919.727321
2 3/8"
1.35"
120
15 amps
Time Delay
15.0
ASME/25 gal. (U.S.)
100
130
7.8
5.5
D20015 Rev. 1 6/28/00
6 ENG
DESCRIPTION OF OPERATION
Air Compressor Pump: To compress air, the piston
moves up and down in the cylinder. 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 compressed. The intake valves close and compressed
air is forced out through the exhaust valves, through the
outlet tube, through the check valve and into the air tank.
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 “closes”, allowing air pressure to remain inside the air tank.
Pressure Switch: The pressure switch is fitted with a
small lever. It is labeled "Auto/O" for automatic run or
off. In the "O" position, the motor will not run. In the "Auto"
position, it 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 valve located on the side of the pressure switch is designed to
automatically release compressed air trapped within the
compressor head and outlet tube. This short release of
air will occur when the air compressor reaches "cut-out"
pressure or the unit is shut off. If the air is not released,
the motor will not be able to start when next required.
Flow Valve: The flow valve allows air to flow from the
head as the motor is getting “up to speed”. Once the
motor reaches normal operating speed, the flow valve
closes and the pump begins to compress air, thus requiring less amp draw on initial start.
Regulator: The air pressure coming from the air tank is
controlled by the regulator. The regulator control knob is
a vibration proof design. Lift the regulator knob to engage and depress the knob to lock. 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 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 accessory, the outlet regulated air pressure may have to be adjusted while operating the accessory.
Regulator Gauge: The outlet pressure gauge indicates
the air pressure available at the outlet side of the regulator. This pressure is controlled by the regulator and is
always less than 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.
Drain Valve: This valve is located at the bottom of the
tank. To drain accumulated moisture from the tank, pull
on the safety valve until tank pressure is 15 PSI. Unscrew the drain valve and allow the water to drain.
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 “popping out” at its factory set pressure (slightly higher than
the pressure switch cut-out setting).
TOOLS NEEDED FOR ASSEMBLY
• a 9/16" socket and an open end wrench for attaching
the wheels
• a 3/8" open end wrench or socket to tighten handle
screws
7 ENG
D20015 Rev. 1 6/28/00
ASSEMBLY
Installing Wheels, Handles, Rubber Foot
Strip
THE WHEELS AND HANDLE DO NOT PROVIDE
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.
BREAK-IN PROCEDURES
Location of the Air Compressor
Locate the air compressor in a clean, dry and well ventilated area. The air filter must be kept clear of obstructions which could reduce air delivery of the air compressor. The air compressor should be located at least 12"
away from the wall or other obstructions that will interfere
with the flow of fresh intake and cooling air.
Lubrication and Oil
1. Attach the handle to the compressor saddle by
inserting the handle
and lining up the two bolt holes on each side. Install
the four screws, two on each side. Tighten securely.
2. Install one shoulder bolt and one nut for each wheel.
Tighten securely. The compressor will sit level if the
wheels are properly installed.
3. Clean and dry underside of air tank leg opposite
wheels. Remove the protective paper strip from the
adhesive backed rubber foot strip. Attach the rubber
foot strip to the bottom of leg. Press firmly into place.
If repairing or replacing cord or plug, the grounding wire
must be kept separate from the current-carrying wires.
Never connect the grounding wire to a flat blade plug
terminal. The grounding wire has insulation with an outer
surface that is green with or without yellow stripes.
If these grounding instructions are not completely understood, or if in doubt as to whether the compressor is
properly grounded, have the installation checked by a
qualified electrician.
inside
the compressor saddle
This unit needs no lubrication or oiling.
Grounding Instructions
RISK OF ELECTRICAL SHOCK. In the event of a
short circuit, grounding reduces the risk of shock
by providing an escape wire for the electric
current. This air compressor must be properly
grounded.
This portable air compressor is equipped with a cord having a grounding wire with an appropriate grounding plug.
The plug must be used with an outlet that has been installed and grounded in accordance with all local codes
and ordinances. The outlet must have the same configuration as the plug. DO NOT USE AN ADAPTER.
Inspect the plug and cord before each use. Do not use if
there are signs of damage.
IMPROPER GROUNDING CAN RESULT IN
ELECTRICAL SHOCK.
Do not modify the plug that has been provided. If it
does not fit the available outlet, the correct outlet
should be installed by a qualified technician.
Voltage and Circuit Protection
Refer to page 5 (Specification Chart) for the voltage and
circuit protection requirements of your compressor. Use
only a fuse or circuit breaker that is the same rating as
the branch circuit the air compressor is operated on. If
the compressor is connected to a circuit protected by
fuses, use only dual element time delay fuses.
Refer to Parts List Manual for your compressor. Certain
air compressor models can be operated on a 15 amp
circuit if:
1. Voltage supply to circuit is normal.
D20015 Rev. 1 6/28/00
8 ENG
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