Craftsman 919.724321 User manual

Owner’s Manual
Permanently Lubricated
Single Stage
Portable
AIR COMPRESSOR
• Safety Guidelines
• Assembly
• Operation
• Maintenance
• Service and Adjustments
• Troubleshooting
• Repair Parts
Model No.
919.724321
CAUTION: Read the Safety Guidelines
and All Instructions Carefully Before
Operating.
Sold by Sears Canada, Inc. Toronto, Ont. M5B 2B8
A14411 Rev. 0 9/08/05

2- ENG
A14411
TABLE OF CONTENTS
WARRANTY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SPECIFICATION CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SAFETY GUIDELINES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
GLOSSARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
DUTY CYCLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
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 (1-800-
4-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

3- ENG A14411A14411
SPECIFICATION CHART
Model No. 919-724321
Running HP -----
Bore 2.375"
Stroke 1.35"
Voltage-Single Phase 120
Minimum Branch Circuit Requirement 15 amps
Fuse Type Time Delay
Air Tank Capacity 30
Approx. Cut-In 120
Approx. Cut-out 150
SCFM @ 40 psig 7.8
SCFM @ 90 psig 5.5
SAFETY GUIDELINES - DEFINITIONS
Indicates an imminent-
ly hazardous 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 potentially
hazardous situation
which, if not avoided, may result in minor
or moderate injury.
Used without the
safety alert symbol
indicates a potentially hazardous situation
which, if not avoided, may result in
property damage.
This manual contains information that is important for you to know and under-
stand. 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.
IMPORTANT SAFETY INSTRUCTIONS
Some dust created by power sanding, sawing, grinding,
drilling, and other construction activities contains chemi-
cals 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, always
wear MSHA/NIOSH approved, properly fitting face mask or respirator when
using such tools.
When using air tools, basic safety precautions should always be followed
to reduce the risk of of personal injury.
Refer to Glossary for abbreviations.

4- ENG
A14411
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
How To Prevent It
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 explo-
sion.
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.
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.

5- ENG A14411
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.
How To Prevent It
What Could Happen
WARNING: Risk from Flying Objects
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.
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.
HAZARD
HAZARD
Drain tank daily or after each use. If tank
develops a leak, replace it immediately
with a new tank or replace the entire
compressor.
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.
Never drill into, weld, or make any
modifications to the tank or its
attachments.
Excessive vibration can weaken the
air tank and cause rupture or
explosion
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.
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.
How To Prevent It
What Could Happen

6- ENG
A14411
WARNING: Risk to Breathing
WARNING: Risk of Electrical Shock
HAZARD
HAZARD
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.
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 pro-
tection.
Sprayed materials such as paint, paint
solvents, paint remover, insecticides,
weed killers, may contain harmful
vapors and poisons.
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.
How To Prevent It
What Could Happen
How To Prevent It
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.
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.

7- ENG A14411
WARNING: Risk of Burns
Touching exposed metal such as the
compressor head or outlet tubes, can
result in serious burns.
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.
WARNING: Risk from Moving Parts
Never operate the compressor with
guards or covers which are damaged or
removed.
Moving parts such as the pulley,
flywheel, and belt can cause serious
injury if they come into contact with you
or your clothing.
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.
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.
HAZARD
HAZARD
HAZARD
Any repairs required on this product
should be performed by authorized
service center personnel.
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.
How To Prevent It
What Could Happen
How To Prevent It
What Could Happen
How To Prevent It
What Could Happen

8- ENG
A14411
Review and understand all instructions
and warnings in this manual.
Become familiar with the operation and
controls of the air compressor.
Keep operating area clear of all persons,
pets, and obstacles.
Keep children 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 features of this
product.
Equip area of operation with a fire
extinguisher.
Do not operate machine with missing,
broken, or unauthorized parts.
WARNING: Risk of Unsafe Operation
Unsafe operation of your air compressor
could lead to serious injury or death to
you or others.
HAZARD
WARNING: Risk of Serious Injury or Property Damage
When Transporting Compressor
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.
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.
(Fire, Inhalation, Damage to Vehicle Surfaces)
HAZARD
SAVE THESE INSTRUCTIONS
How To Prevent It
What Could Happen
How To Prevent It
What Could Happen

9- ENG A14411A14411
ACCESSORIES
GLOSSARY
Become familiar with these terms
before operating the unit.
CFM: Cubic feet per minute.
SCFM: Standard cubic feet per min-
ute; 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 acces-
sory. When the tank pressure drops
to a certain low level the motor will
restart automatically. The low pres-
sure 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 auto-
matically 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 elec-
tricity from electrical panel to outlet.
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
This air compressor pump is capable
of running continuously. However,
to prolong the life of your air com-
pressor, it is recommended that a
50%-75% average duty cycle be
maintained; that is, the air compres-
sor pump should not run more than
30-45 minutes in any given hour.

10- ENG
A14411
Assemble Wheels
It will be neces-
sary to brace or
support one side of the outfit when
installing the wheels because the
compressor will have a tendency
to tip.
1. Attach wheels with shoulder
bolts and nuts as shown.
2. Tighten securely. NOTE: The out-
fit will sit level if the wheels are
properly installed.
The wheels and
handle do not
provide adequate clearance, stabil-
ity or support for pulling the unit
up and down stairs or steps. The
unit must be lifted, or pushed up a
ramp.
Assemble Rubber Feet
1. Attach rubber feet with the
screws provided as shown in
previous figure.
2. Tighten securely.
Rubber
Feet
Screw
Nut
Wheel Shoulder
Bolt
ASSEMBLY
Tools Required for Assembly
1 - 9/16" socket or open end wrench
1 - 1/2" socket or open end wrench
Unpacking
1. Remove all packaging leaving
the air compressor on the pallet.
2. Remove and discard the (4)
screws holding the air compres-
sor to the pallet.
It may be neces-
sary to brace or
support one side of the air com-
pressor when removing the pallet
because the air compressor will
have a tendency to tip.
3. Carefully remove the air com-
pressor from the pallet.
Screws
Contents of Carton
1 - Air Compressor
2 - Wheels
2 - Shoulder Bolts, 3/8-16
2 - Hex Nuts, 3/8-16
2 - Rubber Bumpers
2 - Screws, 1/4-20 x .75"

11- ENG A14411
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 ventila-
tion openings on the compressor are
necessary to maintain proper operat-
ing 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 pro-
viding an escape wire for the elec-
tric 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 illustra-
tions). 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.
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 ground-
ed, have the installation checked
by a qualified electrician.
Risk of Electrical
Shock. 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.
Grounding Pin
Grounded
Outlets
Plug

12- ENG
A14411
Extension Cords
Using extension cords is not recom-
mended. The use of extension cords
will cause voltage to drop resulting
in power loss to the motor and over-
heating.
Instead of using an extension cord,
increase the working reach of the air
hose by attaching
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.
Risk of Unsafe
Operation. Certain
air compressors can be operated
on a 15 amp circuit if the following
conditions are met.
1. Voltage supply to circuit must
comply with the National
Electrical Code.
2. Circuit is not used to supply any
other electrical needs.
3. Extension cords comply with
specifications.
4. Circuit is equipped with a 15
amp circuit breaker or 15 amp
time delay fuse. NOTE: If com-
pressor 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 can-
not be met, or if operation of the
compressor repeatedly causes inter-
ruption of the power, it may be nec-
essary to operate it from a 20 amp
circuit. It is not necessary to change
the cord set.

13- ENG A14411
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 counter-
clockwise to decrease pressure.
When the desired pressure is reached
push knob in to lock in place.
Universal Quick-Connect Body:
The universal quick-connect body
accepts the three most popular styles
of quick-connect plugs- Industrial,
automotive (Tru-flate), and ARO. One
hand push-to-connect operation
makes connections simple and easy.
Drain Valve: The drain valve is locat-
ed at the base of the air tank and is
used to drain condensation at the
end of each use.
Description of Operation
Become familiar with these controls
before operating the unit.
On/Auto/Off Switch: Turn this switch
ON 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" pres-
sure. 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 fac-
tory set pressure (slightly higher than
the pressure switch "cut-out" setting).
Outlet Pressure Gauge: The outlet
pressure gauge indicates the air pres-
sure 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
Safety Valve
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.
On/Auto/Off
Switch
Regulator
Outlet
Pressure
Gauge
Tank Pressure Gauge
Pressure
Switch
Drain
Valve
Universal
Quick-
Connect
Body

14- ENG
A14411
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 compres-
sor is operating, the check valve is
"open", allowing compressed air to
enter the air tank. When the air com-
pressor reaches "cut-out" pressure,
the check valve "closes", allowing air
pressure to remain inside the air tank.
Pressure Release Valve: The pres-
sure release valve located on 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 escap-
ing 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.
Check Valve
Pressure
Release
Valve
Before Starting
Break-in instructions
Risk of Unsafe
Operation. Serious
damage may result if the follow-
ing 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 com-
plete 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.
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 (coun-
ter-clockwise) to permit air to
escape and prevent air pressure
build up in the air tank during the
break-in period.
NOTE: Always drain tank on a wash-
able surface or in a suitable container
to prevent damaging or staining sur-
faces.
4. Move the On/Auto/Off lever to
"ON/AUTO" position. The com-
pressor will start.
How to Use Your Unit
How to Stop:
1. Set the On/Auto/Off lever to
"OFF".

15- ENG A14411
How to Start:
1. Turn the On/Auto/Off lever to
"AUTO" and allow tank pressure
to build. Motor will stop when
tank pressure reaches "cut-out"
pressure.
2. Pull the regulator knob out and
turn clockwise to increase pres-
sure. When the desired pressure
is reached push knob in to lock
in place. The compressor is
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.
5. Run the compressor for 15 min-
utes. 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.
Risk of Bursting.
Too much air pres-
sure causes a hazardous risk of
bursting. Check the manufacturer’s
maximum pressure rating for air
tools and accessories. The regu-
lator outlet pressure must never
exceed the maximum pressure rat-
ing.

16- ENG
A14411
MAINTENANCE
Customer Responsibilities
Daily
or after
each
use
Before
each
use
●
●
●
Every
40
hours
Every
100
hours
Yearly
●(1)
1- more frequent in dusty or humid conditions
Check Safety Valve
Drain Tank
Air Filter
NOTE: See "Operation" section for
the location of controls.
To ensure efficient operation and lon-
ger life of the air compressor outfit, a
routine maintenance schedule should
be prepared and followed. The fol-
lowing routine maintenance schedule
is geared to an outfit in a normal
working environment operating on a
daily basis. If necessary, the schedule
should be modified to suit the condi-
tions under which your compressor is
used. The modifications will depend
upon the hours of operation and the
working environment. Compressor
outfits in an extremely dirty and/or
hostile environment will require a
greater frequency of all maintenance
checks.
Risk of Unsafe
Operation. Unit
cycles automatically when power
is on. When servicing, you may
be exposed to voltage sources,
compressed air, or moving parts.
Before servicing unit unplug or
disconnect electrical supply to the
air compressor, bleed tank of pres-
sure, and allow the air compressor
to cool.
To Check Safety Valve
Risk of Bursting.
If the safety valve
does not work properly, over-
pressurization may occur, causing
air tank rupture or an explosion.
1. Before starting compressor, pull
the ring on the safety valve to
make sure that the safety valve
operates freely. If the valve
is stuck or does not operate
smoothly, it must be replaced
with the same type of valve.
Air compressor pump intake
and exhaust valves ●
To Drain Tank
1. Set the On/Auto/Off lever to
"OFF" and unplug unit.
2. Pull the regulator knob out and
turn counterclockwise to set the
outlet pressure to zero.
3. Remove the air tool or accessory.
4. Pull ring on safety valve allowing
air to bleed from the tank until
tank pressure is approximately
20 psi. Release safety valve ring.
5. Drain water from air tank by
opening drain valve (counter-
clockwise) on bottom of tank.
Risk of Bursting.
Water will con-
dense in the air tank. If not drained,
water will corrode and weaken the
air tank causing a risk of air tank
rupture.

17- ENG A14411
6. After the water has been drained,
close the drain valve (clockwise).
The air compressor can now be
stored.
NOTE: If drain valve is plugged,
release all air pressure. The valve
can then be removed, cleaned, the
reinstalled.
Air Filter - Inspection and
Replacement
Risk of Burns.
Hot surfaces.
Compressor heads are exposed
when filter cover is removed.
Allow compressor to cool prior to
servicing.
A dirty air filter will not allow the com-
pressor to operate at full capacity.
Keep the air filter clean at all times.
1. Remove the air filter and make
sure it is clean.
IMPORTANT: Do not operate
the compressor with the air filter
removed.
Motor
The motor has an automatic reset
thermal overload protector. If the
motor overheats for any reason, the
overload protector will shut off the
motor. The motor must be allowed
to cool down before restarting. The
compressor will automatically restart
after the motor cools.
If the overload protector shuts the
motor off frequently, check for a pos-
sible voltage problem. Low voltage
can also be suspected when:
1. The motor does not get up to full
power or speed.
2. Fuses blow out when starting
the motor; lights dim and remain
dim when motor is started and is
running.
Air Compressor Pump Intake
and Exhaust Valves
Once a year have a Trained Service
Technician check the air compressor
pump intake and exhaust valves.
2. If dirty, rinse air filter with warm
water and squeeze dry.
3. Replace air filter.
4. Replace filter cover.
NOTE: If the air filter is extremely
dirty it will need to be replaced. Refer
to the "Repair Parts" for the correct
part number.
Air Filter

18- ENG
A14411
SERVICE AND ADJUSTMENTS
5. Using an adjustable wrench
loosen pressure relief tube nut
at air tank and pressure switch.
Carefully move pressure relief
tube away from check valve.
6. Unscrew the check valve (turn
counterclockwise) using a 7/8"
open end wrench. Note the ori-
entation for reassembly.
7. Using a screwdriver, care-
fully push the valve disc up and
down. NOTE: The valve disc
should move freely up and down
on a spring which holds the valve
disc in the closed position, if
not the check valve needs to be
cleaned or replaced.
8. Clean or replace the check valve.
A solvent, such as paint or var-
nish remover can be used to
clean the check valve.
9. Apply sealant to the check valve
threads. Reinstall the check valve
(turn clockwise).
10. Replace the pressure release
tube. Tighten nut.
11. Replace the outlet tube and
tighten nut.
12. Replace the shroud and air filter.
13. Perform the Break-in Procedure.
See "Break-in Procedure" in the
Operation section.
Risk of Unsafe
Operation. Unit
cycles automatically when power
is on. When servicing, you may
be exposed to voltage sources,
compressed air, or moving parts.
Before servicing unit unplug or
disconnect electrical supply to the
air compressor, bleed tank of pres-
sure, and allow the air compressor
to cool.
To Replace or Clean Check
Valve
1. Release all air pressure from air
tank. See "To Drain Tank" in the
Maintenance section.
2. Set the On/Auto/Off lever to
"OFF" and unplug unit.
3. Remove shrouds.
4. Using an adjustable wrench
loosen outlet tube nut at air tank
and pump. Carefully move outlet
tube away from check valve.
Outlet Tube
Check
Valve
Nut
Nut
Pressure
Relief
Tube
In closed position
disc is visible.
In open
position
nothing is
visible.
Screwdriver
All maintenance and repair opera-
tions not listed must be performed
by Trained Service Technician.

19- ENG A14411
6. Assemble the regulator and ori-
ent as shown.
NOTE: Arrow indicates flow of air.
Make sure it is pointing in the direc-
tion of air flow.
7. Reapply pipe sealant to outlet
pressure gauge and quick con-
nect.
8. Reassemble outlet pressure
gauge and quick connect. Orient
outlet pressure gauge to read
correctly. Tighten quick connect
with wrench.
To Replace Regulator
1. Release all air pressure from air
tank. See "To Drain Tank" in the
Maintenance section.
2. Set the On/Auto/Off lever to
"OFF" and unplug unit.
3. Remove the outlet pressure
gauge and quick connect (if
equipped) from the regulator.
4. Remove the regulator.
5. Apply pipe sealant tape to the
nipple.
Nipple
Outlet
Pressure
Gauge
Quick
Connect
Regulator
Regulator
Arrow
Regulator

20- ENG
A14411
STORAGE
Before you store the air compressor,
make sure you do the following:
1. Review the "Maintenance" sec-
tion on the preceding pages and
perform scheduled maintenance
as necessary.
2. Set the On/Auto/Off lever to
"OFF" and unplug unit.
3. Turn the regulator counterclock-
wise and set the outlet pressure
to zero.
4. Remove the air tool or accessory.
5. Pull ring on safety valve allowing
air to bleed from the tank until
tank pressure is approximately
20 psi. Release safety valve ring.
6. Drain water from air tank by
opening drain valve on bottom of
tank.
Risk of Bursting.
Water will con-
dense in the air tank. If not
drained, water will corrode and
weaken the air tank causing a risk
of air tank rupture.
7. After the water has been drained,
close the drain or drain valve.
NOTE: If drain valve is plugged,
release all air pressure. The valve
can then be removed, cleaned, then
reinstalled.
8. Protect the electrical cord and
air hose from damage (such as
being stepped on or run over).
Wind them loosely around
the compressor handle. (If so
equipped)
Store the air compressor in a clean
and dry location.