Craftsman 919.724591 User Manual
Owner’s Manual
Permanently Lubricated
Single Stage
Portable
AIR COMPRESSOR
Model No.
919.724591
• Safety Guidelines
• Assembly
• Operation
• Maintenance
• Service and Adjustments
• Troubleshooting
• Repair Parts
CAUTION: Read the Safety Guidelines and
All Instructions Carefully Before Operating.
Sold by Sears Canada, Inc. Toronto, Ont. M5B 2B8
A14841 Rev. 0 10/14/05
TABLE OF CONTENTS
WARRANTY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SPECIFICATION CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SAFETY GUIDELINES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
GLOSSARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
DUTY CYCLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-12
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-15
MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-17
SERVICE AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-19
STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-23
REPAIR PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-27
HOW TO ORDER REPAIR PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
WARRANTY
FULL ONE YEAR WARRANTY
If this CRAFTSMAN Inflator fails due to a defect in material or workmanship
within one year from the date of purchase, Sears will at its option repair or
replace it free of charge. Contact your nearest Sears Service Center (1-8004-MY-HOME®) to arrange for product repair, or return the CRAFTSMAN
product to the place of purchase for replacement.
If this Air Compressor is used for commercial or rental purposes, this warranty
applies for only ninety days from the date of purchase.
This warranty gives you specific legal rights and you may also have other
rights which vary from province to province.
Sears Canada, Inc. Toronto, Ont. M5B 2B8
A14841
2- ENG
SPECIFICATION CHART
Model No. 919-724591
Running Horsepower 1.6
Bore 2.375"
Stroke 1.35"
Voltage-Single Phase 120
Minimum Branch Circuit Requirement 15 amps
Fuse Type Time Delay
Air Tank Capacity 33
Approx. Cut-In 120
Approx. Cut-out 150
SCFM @ 40 psig 7.8
SCFM @ 90 psig 5.5
Refer to Glossary for abbreviations.
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 below. Please read the manual and pay
attention to these symbols.
Indicates an
imminently hazardous
situation which, if not avoided, will result
in death or serious injury.
which, if not avoided, may result in minor
or moderate injury.
Indicates a potentially
hazardous situation
Indicates a potentially
hazardous situation
which, if not avoided, could result in
death or serious injury.
indicates a potentially hazardous situation
which, if not avoided, may result in
property damage.
Used without the
safety alert symbol
IMPORTANT SAFETY INSTRUCTIONS
Some dust created by power sanding, sawing, grinding,
chemicals known (to the State of California) to cause cancer, birth defects
or other reproductive harm. Some example of these chemicals are:
• lead from lead-based paints
• crystalline silica from bricks and cement and other masonry products
• arsenic and chromium from chemically-treated lumber
Your risk from these exposures varies, depending on how often you do
this type of work. To reduce your exposure to these chemicals: work in
a well ventilated area, and work with approved safety equipment, al ways
wear MSHA/NIOSH approved, properly fit ting face mask or res pi ra tor when
us ing such tools.
When using air tools, basic safety precautions should always be followed
to reduce the risk of of personal injury.
drilling, and other construction activities contains
3 - ENG
A14841
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 operation instructions before
using this equipment.
HAZARD
WARNING: Risk of explosion or fire
What Could 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. To reduce the risk
of fire, do not allow the compressor to
operate unattended.
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 obstruction 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.
Always disconnect electrical power by
moving pressure switch lever to the off
position and drain tank daily or after
each use.
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4- ENG
HAZARD
WARNING: Risk of Bursting
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 Could Happen
Failure to properly drain condensed
water from tank, causing rust and
thinning of the steel tank.
Modifications or attempted repairs to
the tank.
Unauthorized modifications to the
unloader valve, safety valve, or any
other components which control tank
pressure.
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.
HAZARD
How To Prevent It
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 (if not
equipped) 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.
WARNING: Risk from Flying Objects
What Could 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.
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.
5 - ENG
A14841
HAZARD
WARNING: Risk of Electrical Shock
What Could 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 grounding instructions.
HAZARD
WARNING: Risk to Breathing
What Could Happen
The compressed air directly from your
compressor is not safe for breathing.
The air stream may contain carbon
monoxide, toxic vapors, or solid
particles from the tank. Breathing these
contaminants can cause serious injury
or death.
Sprayed materials such as paint, paint
solvents, paint remover, insecticides,
weed killers, may contain harmful
vapors and poisons.
How To Prevent It
Never operate the compressor outdoors
when it is raining or in wet conditions.
Never operate compressor with
protective covers 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.
How To Prevent It
Air obtained directly from the compressor
should never be used to supply air for
human consumption. In order to use air
produced by this compressor for
breathing, suitable filters and in-line
safety equipment must be properly
installed. In-line filters and safety
equipment used in conjunction with the
compressor must be capable of treating
air to all applicable local and federal
codes prior to human consumption.
Work in an area with good cross
ventilation. Read and follow the safety
instructions provided on the label or
safety data sheets for the materials
you are spraying. Use a NIOSH/MSHA
approved respirator designed for use
with your specific application.
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6- ENG
HAZARD
WARNING: Risk of Burns
What Could Happen
Touching exposed metal such as the
compressor head or outlet tubes, can
result in serious burns.
HAZARD
WARNING: Risk from Moving Parts
What Could 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.
HAZARD
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.
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.
WARNING: Risk of Falling
A portable compressor can fall from
a table, workbench, or roof causing
damage to the compressor and could
result in serious injury or death to the
operator.
How To Prevent ItWhat Could Happen
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.
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A14841
HAZARD
WARNING: Risk of Serious Injury or Property Damage
When Transporting Compressor
(Fire, Inhalation, Damage to Vehicle Surfaces)
What Could 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.
HAZARD
WARNING: Risk of Unsafe Operation
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.
What Could Happen
Unsafe op er a tion of your air compressor
could lead to se ri ous in ju ry or death to
you or others.
SAVE THESE INSTRUCTIONS
How To Prevent It
Review and understand all instructions
and warnings in this manual.
Be come fa mil iar with the op er a tion and
con trols of the air compressor.
Keep operating area clear of all persons,
pets, and obstacles.
Keep chil dren away from the air
compressor at all times.
Do not operate the product when
fatigued or under the influence of
alcohol or drugs. Stay alert at all times.
Never defeat the safety fea tures of this
prod uct.
Equip area of operation with a fire
extinguisher.
Do not op er ate machine with missing,
broken, or un au tho rized parts.
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8- ENG
GLOSSARY
Become familiar with these terms
before operating the unit.
CFM: Cubic feet per minute.
SCFM: Standard cubic feet per
minute; a unit of measure of air
delivery.
PSIG: Pounds per square inch
gauge; a unit of measure of pressure.
Code Certification: Products that
bear one or more of the following
marks: UL, CUL, ETL, CETL, have
been evaluated by OSHA certified
independent safety laboratories and
meet the applicable Underwriters
Laboratories Standards for Safety.
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 the motor will restart
automatically. The low pressure
at which the motor automatically
restarts is called "cut-in" pressure.
Cut-Out Pressure: When an air
compressor is turned on and 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.
Branch Circuit: Circuit carrying
electricity from electrical panel to
outlet.
ACCESSORIES
This unit is capable of powering the following Accessories. The accessories are
available through the current Power and Hand Tool Catalog or full-line Sears
stores.
Accessories
• In Line Filter
• Tire Air Chuck
• Quick Connector Sets (various
sizes)
Refer to the selection chart located on the unit to select the tools this unit is
capable of powering.
• Air Pressure Regulators
• Oil Fog Lubricators
• Air Hose:1/4", 3/8" or 1/2" I.D. in
various lengths
DUTY CYCLE
Air compressors should be operated
on not more than a 50% duty cycle.
This means an air compressor that
pumps air more than 50% of one
hour is considered misuse, because
the air compressor is undersized for
the required air demand. Maximum
compressor pumping time per hour is
30 minutes.
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A14841
ASSEMBLY
Contents of Carton
1 - Air Compressor
1 - Handle
1 - Grip Handle
4 - Self Tapping Screw
2 - Wheels
2 - Shoulder Bolts, 3/8-16
2 - Hex Nuts, 3/8-16
1 - Rubber Strip
Tools Required for Assembly
1 - 9/16" socket or open end wrench
1 - 1/2" socket or open end wrench
Assemble Handle
1. To make installation easier,
submerge handle grip into warm
soapy water. Remove handle
grip from soapy water and slide
onto handle.
2. Insert the handle inside the
compressor saddle and line up
the two bolt holes on each side.
Handle
Grip
Screw
Handle
Nut
Shoulder
Wheel
Rubber Strip
Bolt
3. Install the four screws, two on
each side.
4. Tighten securely.
Assemble Wheels
It will be necessary
to brace or
support one side of the unit when
installing the wheels because the
compressor will have a tendency
to tip.
1. Attach wheels with shoulder
bolts and nuts as shown. NOTE:
Place the bolts in the bottom
hole of the wheel bracket on
units 20-29 gallons and in the
top hole on units 30 gallons and
up.
2. Tighten securely. NOTE: The
unit will sit level if the wheels are
properly installed.
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.
Assemble Rubber Strip
1. Clean and dry underside of air
tank leg opposite wheels.
2. Remove the protective paper
strip from the adhesive backed
rubber foot strip.
3. Attach the rubber foot strip to
the bottom of leg. Press firmly
into place.
A14841
10- ENG
INSTALLATION
HOW TO SET UP YOUR
UNIT
Location of the Air Compressor
Locate the air compressor in a
clean, dry and well ventilated area.
The air compressor should be
located at least 12" away from the
wall or other obstructions that will
interfere with the flow of air. The
air compressor pump and shroud
are designed to allow for proper
cooling. The ventilation openings
on the compressor are necessary
to maintain proper operating
temperature. Do not place rags or
other containers on or near these
openings.The air filter must be kept
clear of obstructions which could
reduce air flow to the air compressor.
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.
The portable air compressor is
equipped with a cord having a
grounding wire with an appropriate
grounding plug (see following
illustrations). The plug must be used
with an outlet that has been installed
and grounded in accordance with all
local codes and ordinances.
1. The cord set and plug with this
unit contains a grounding pin.
This plug MUST be used with a
grounded outlet.
IMPORTANT: The outlet being used
must be installed and grounded in
accordance with all local codes and
ordinances.
2. Make sure the outlet being used
has the same configuration
as the grounded plug. DO
NOT USE AN ADAPTER. See
illustration.
Plug
Grounded
Outlets
Grounding Pin
3. Inspect the plug and cord before
each use. Do not use if there are
signs of damage.
4. 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.
IMPROPER
GROUNDING CAN
RESULT IN ELECTRICAL SHOCK.
Do not modify the plug provided. If
it does not fit the available outlet,
a correct outlet should be installed
by a qualified electrician.
Repairs to the cord set or plug
MUST be made by a qualified
electrician.
11 - ENG
A14841
Extension Cords
Use extra air hose instead of an
extension cord to avoid voltage drop
and power loss to the motor, and to
prevent overheating.
If an extension cord must be used,
be sure it is:
• 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
• in good condition
• no longer than 50 feet
• 12 gauge (AWG) or larger. (Wire
size increases as gauge number
decreases. 10 AWG and 8 AWG
may also be used. DO NOT USE
14 OR 16 AWG.)
Voltage and Circuit Protection
Refer to the Parts Manual for the
voltage and minimum branch circuit
requirements.
Certain air compressors can be
operated on a 15 amp circuit if the
following conditions are met.
1. Voltage supply through branch
circuit is 15 amps.
2. Circuit is not used to supply any
other electrical needs (lights,
appliances, etc.).
3. Extension cords comply with
specifications.
4. Circuit is equipped with a
15 amp circuit breaker or 15
amp time delay fuse. NOTE: If
compressor is connected to a
circuit protected by fuses, use
only time delay fuses. Time delay
fuses should be marked "D" in
Canada and "T" in the US.
If any of the above conditions
cannot be met, or if operation of
the compressor repeatedly causes
interruption of the power, it may be
necessary to operate it from a 20
amp circuit. It is not necessary to
change the cord set.
A14841
12- ENG
OPERATION
Know Your Air Compressor
READ THIS OWNER’S MANUAL AND SAFETY RULES BEFORE OPERATING
YOUR UNIT. Compare the illustrations with your unit to familiarize yourself with
the location of various controls and adjustments. Save this manual for future
reference.
Pressure
Switch
Outlet
Pressure Gauge
Regulator
"On/Auto/
Off" Switch
Safety Valve
Tank
Pressure Gauge
Description of Operation
Become familiar with these controls
before operating the unit.
On/Auto/Off Switch: Turn this
switch "ON/AUTO" to provide
automatic power to the pressure
switch and "OFF" to remove power
at the end of each use.
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.
Safety Valve: If the pressure switch
does not shut off the air compressor
at its "cut-out" pressure setting, the
safety valve will protect against high
pressure by "popping out" at its
factory set pressure (slightly higher
than the pressure switch "cut-out"
setting).
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 regulator and is
always less than or equal to the tank
pressure.
Tank Pressure Gauge: The tank
pressure gauge indicates the reserve
air pressure in the tank.
Regulator: Controls the air pressure
shown on the outlet pressure
gauge. Pull the knob out and turn
clockwise to increase pressure
and counterclockwise to decrease
pressure. When the desired pressure
is reached push knob in to lock in
place.
Drain Valve:
The drain valve
is located at
the base of the
air tank and is
Drain
Valve
used to drain
condensation
at the end of each use.
13 - ENG
A14841
Cooling System (not shown): 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.
Air Compressor Pump (not
shown): Compresses air 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.
Check
Valve:
When the air
compressor
is operating,
the check
valve is
"open",
Check Valve
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
Pressure
Release
Valve
the side of
the pressure switch, 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. The pressure release valve allows
the motor to restart freely. When the
motor stops running, air will be heard
escaping from this valve for a few
seconds. No air should be heard
leaking when the motor is running, or
continuous leaking after unit reaches
"cut-out" pressure.
Air Intake Filter (not shown): This
filter is designed to clean air coming
into the pump. This filter must
always be clean and ventilation
openings free from obstructions. See
"Maintenance".
How to Use Your Unit
How to Stop:
1. Set the "On/Auto/Off" lever to
"OFF".
Before Starting
Break-in Procedure
Serious damage
following break-in instructions are
not closely followed.
This procedure is required before the
air compressor is put into service and
when the check valve or a complete
compressor pump has been replaced.
1. Make sure the "On/Auto/Off"
lever is in the "OFF" position.
NOTE: If quick connect is installed,
pull coupler back until it clicks to
prevent air from escaping through the
quick connect.
Pressure
Switch
Outlet
Pressure
Gauge
may result if the
"On/Auto/
Off" Switch
Safety
Valve
Tank
Pressure
Gauge
Regulator
Quick
Connect
A14841
14- ENG
2.
Plug the power cord into the
correct branch circuit receptacle.
(Refer to Voltage and Circuit
Protection paragraph in the
Installation section of this
manual.)
3. Open the drain valve fully
(counter-clockwise) to permit
air to escape and prevent air
pressure build up in the air tank
during the break-in period.
4. Move the "On/Auto/Off" lever
to "ON/AUTO" position. The
compressor will start.
5. Run the compressor for 15
minutes. Make sure the drain
valve is open and there is
minimal air pressure build-up in
tank.
6. After 15 minutes, close the drain
valve (clockwise). The air receiver
will fill to "cut-out" pressure and
the motor will stop.
The compressor is now ready for use.
Before Each Start-Up:
1. Place "On/Auto/Off" lever to
"OFF".
2. Pull regulator knob out, turn
counter-clockwise until it stops.
Push knob in to lock in place.
3. Attach hose and accessories.
NOTE: The hose or accessory
will require a quick connect plug
if the air outlet is equipped with a
quick connect.
Too much
air pressure
causes a hazardous risk
of bursting. Check the
manufacturer’s maximum
pressure rating for air tools
and accessories. The regulator
outlet pressure must never
exceed the maximum pressure
rating.
How to Start:
1. Turn the "On/Auto/Off" lever
to "ON/AUTO" and allow tank
pressure to build. Motor will stop
when tank pressure reaches "cutout" pressure.
2. Pull the regulator knob out
and turn clockwise to increase
pressure. When the desired
pressure is reached push knob in
to lock in place. The compressor
is ready for use.
NOTE: Always operate the air
compressor in well-ventilated areas
free of gasoline or other combustible
vapors. If the compressor is being
used to operate a sprayer DO NOT
place near the spray area.
15 - ENG
A14841
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