Sears 919.72633 User Manual
CRAFTSMAN
OWNERS MANUAL FOR
Model No.
919.726330
CRAFTSMAN
• TWIN-V OILFREE •
T ANK MOUNTED
AIR COMPRESSOR
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.
IMPORTANT :
Read the Safety Guidelines
and All Instructions Carefully
Before Operating
MGP-726330 10/1/96
SAFETY GUIDELINES
ASSEMBLY
OPERATION
MAINTENANCE
TROUBLESHOOTING
REP AIR P ARTS
Model No________________________
Serial No________________________
Date Code_______________________
Tank Registration No______________
Sold by Sears Canada, Inc., Toronto, Ont. M5B 2B8
TABLE OF CONTENTS
Page
WARRANTY ..........................................................................................................................2
SAFETY GUIDELINES ..........................................................................................................3
WARNING CHART................................................................................................................3
GENERAL INFORMATION.................................................................................................... 5
GLOSSARY ...........................................................................................................................5
SPECIFICATION CHART ......................................................................................................5
DESCRIPTION OF OPERATION .......................................................................................... 6
TOOLS NEEDED FOR ASSEMBLY......................................................................................6
ASSEMBLY............................................................................................................................7
BREAK-IN PROCEDURES ...................................................................................................7
Location of Air Compressor.............................................................................................. 7
Lubrication and Oil ...........................................................................................................7
Grounding Instructions ..................................................................................................... 7
Voltage and Circuit Protection..........................................................................................8
Break-in Procedure ..........................................................................................................8
OPERATING PROCEDURES ............................................................................................... 8
MAINTENANCE.....................................................................................................................9
Air Filter - Inspection and Replacement........................................................................... 9
Check Valve -Replacement..............................................................................................9
Safety Valve - Inspection .................................................................................................9
Motor................................................................................................................................ 9
Storage............................................................................................................................. 9
TROUBLESHOOTING GUIDE .............................................................................................. 10
AIR COMPRESSOR DIAGRAM ............................................................................................ 12
COMPRESSOR PUMP DIAGRAM........................................................................................ 14
HOW TO ORDER REPAIR PARTS.......................................................................................18
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
2
SAFETY GUIDELINES
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 following symbols. Please read the manual
and pay attention to these sections.
URGENT SAFETY INFORMA TION - A
HAZARD THA T WILL CAUSE SERIOUS
INJURY OR LOSS OF LIFE.
Information for preventing damage
to equipment.
HAZARDS CAN OCCUR IF EQUIPMENT IS NOT USED PROPERLY.
PLEASE READ THE FOLLOWING CHART.
WHAT TO
LOOK FOR
Hot Parts
Flammable
Vapors
WHAT COULD HAPPEN
The metal compressor components, such as
manifold , tubes, etc. become hot when the air
compressor is running. If you touch them, you
may be seriously burned.
It is normal for the motor and pressure switch to
spark when compressor starts or stops. A spark
can ignite vapors from gasoline or solvents,
causing a fire or explosion.
IMPORT ANT SAFETY INFORMATION - A
HAZARD THA T
MIGHT
CAUSE SERIOUS
INJURY OR LOSS OF LIFE.
NOTE
Information that you should pay
special attention to.
HOW TO PREVENT IT
Avoid contact with metal components of the
compressor during or immediately after operation.
Reaching under or removing portions of the plastic
enclosures such as the console cover exposes hot
surfaces. Allow compressor to cool prior to
servicing.
If spraying a flammable material, provide ample
ventilation. Never spray in a closed area. There
must be a flow of fresh air at all times.
Always operate the air compressor in well-ventilated
areas, free of gasoline or other solvent vapors. Do
not operate the compressor near the spray area.
Air Tank
Modifications to air compressor components in an
attempt to reach higher air pressure can cause the
air tank to rupture or explode.
Incompatibility between tank and compressor will
cause the tank to rupture.
Modifications to the air tank will cause it to weaken.
3
Do not adjust, remove or tamper with the safety
valve or pressure switch. If safety valve or pressure
switch replacement is necessary, a part with the
same ratings must be used.
Never replace the air tank with a different model or
a larger tank. Return to Sears Service Center if
replacement is required.
Never drill into, weld or in any way modify the air
tank. The tank may rupture or explode. If leaks
develop due to corrosion or tank is damaged, return
to Sears Service Center for replacement.
WHAT TO
LOOK FOR
SAFETY GUIDELINES
WHA T COULD HAPPEN HOW TO PREVENT IT
Compressed
Air
Electricity
Toxic Vapors
Compressed air can propel dust, dirt or loose
particles. These propelled particles may cause
serious injury or damage.
Too much air pressure applied to air tools or
accessories can cause damage or risk of bursting.
Your air compressor is powered by electricity. Like
any other electrically powered device, if it is not
used properly it may cause electrical shock.
It is normal for compressed air to contain toxic or
irritating vapors. Such vapors are harmful if
inhaled.
Never point any nozzle or sprayer toward a person
or any part of the body.
Always wear safety goggles or glasses when using
the air compressor.
Always turn the air compressor off before attaching
or removing accessories.
Check the manufacturer’s pressure rating for air
tools and accessories. Regulator outlet pressure
must never exceed the maximum pressure rating.
Always unplug the air compressor prior to maintenance or repair.
Never use the air compressor outdoors when it is
raining.
Always plug the cord into an electrical outlet with
the specified voltage and adequate fuse protection.
Never directly inhale the compressed air produced
by this unit.
Unsuitable
Solvents
Certain materials you are spraying (like paint, weed
killer, sand or insecticide) can be harmful if you
inhale them.
The solvents 1,1,1 - Trichloroethane and Methylene
Chloride can chemically react with aluminum used
in paint spray guns, paint pumps, etc., and cause
an explosion. These solvents can also react with
galvanized components and cause corrosion and
weakening of parts. This does not affect your air
compressor - but it may affect the equipment being
used.
Read labels and safety data for all materials you
spray. Follow all safety precautions.
Use a mask or respirator if there is a chance of
inhaling toxic sprayed materials. Masks and
respirators have limits and will only provide protection against some kinds and limited amounts of
toxic material. Read mask and respirator instructions carefully. Consult with a safety expert or
industrial hygienist if you are not sure about the use
of a certain mask or respirator.
If the material you intend to spray contains the
solvents listed at left (read the label or data sheet),
do not use accessories that contain aluminum or
galvanized parts. You must either change the
material you intend to spray, or use only stainless
steel spray equipment.
4
GENERAL INFORMATION
Y ou have purchased an air compressor unit consisting of a
one cylinder, single-st age air compressor pump and air
tank.
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,
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.
and inflator kits. An air pressure regulator is required for
most of the applications.
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.
Number of Cylinders
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.
919.726330
2
2 3/8"
1.2"
240
15 amps
Time Delay
15.0
ASME/33 gal. (U.S.)
100
125
15.0
1 1.5
5
DESCRIPTION OF OPERATION
Air Compressor Pump: T o 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.
Safety Valve: If the pressure switch does not shut of f 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).
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. T o 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 t ank 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 t ank.
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.
TOOLS NEEDED FOR ASSEMBLY
• a 9/16" socket and an open end wrench for removing
shipping boards.
• a 3/8” open end wrench or socket to tighten handle
screws.
6
REMOVAL OF SHIPPING BOARDS AND INSTALLATION
FOR STATIONARY (PERMANENTLY MOUNTED) UNITS
2. This compressor is designed to be bolted directly to a
It may be necessary to brace or support one
side of the outfit when removing the shipping
boards because the air compressor will have a
tendency to tip.
1. Remove all packaging such that only the compressor
on the pallet remains. Remove and discard the (4)
screws and washers that hold the compressor to the
pallet.
level floor. Prior to inst alling, place the new washers
which are supplied with the compressor, between the
feet and floor such that the ring base at the bottom of
the tank does not contact the floor . Tighten bolts 15-20
ft. lbs.
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
This unit needs no lubrication or oiling.
Grounding Instructions
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.
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.
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.
Inspect the plug and cord before each use. Do not use if
there are signs of damage.
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.
240 VOLT MODELS
7
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.
Break-in Procedure
Serious damage may result if the following
break-in instructions are not closely followed.
This procedure is required only once, before the air compressor is put into service.
OPERATING PROCEDURES
1. Set the pressure switch "AUTO/O" lever in the "O"
position for "Off".
2. Plug the power cord into the correct branch circuit
receptacle.
3. Do not attach hose to outlet. Leave the outlet open to
the atmosphere.
4. Turn the regulator
prevent air pressure build-up in the tank.
5. Move the "AUTO/O" lever to "AUTO". The compressor will start.
6. RUN THE COMPRESSOR FOR 15 MINUTES. Make
sure the regulator is open and there is no tank pressure
build-up.
7. After 15 minutes, close the regulator by turning it
counterclockwise
pressure and then the motor will stop.
clockwise
. The air tank will fill to cut-out
, opening it fully , to
1. Before attaching air hose or accessories, make sure
the "AUTO/O" lever is set to “O” and the air regulator
is closed.
2. Attach hose and accessories.
TOO MUCH AIR PRESSURE CREATES A
HAZARDOUS RISK OF BURSTING. CAREFULL Y FOLLOW STEPS 3 AND 5 BELOW
EACH TIME THE COMPRESSOR IS USED.
Compressed air from the outfit may
contain water condensation. Do not
spray unfiltered air at an item that
could be damaged. Some air operated
tools or devices may require filtered
air. Read the instructions for the air
tool or device.
3. Check the manufacturer’s maximum pressure rating
for air tools and accessories. The regulator outlet
pressure must never exceed the maximum pressure
rating.
4. Turn the "AUTO/O" lever to “AUTO” and allow tank
pressure to build. Motor will stop when tank pressure
reaches “cut-out” pressure.
6. Always operate the air compressor in well-ventilated
areas; free of gasoline or other solvent vapors. Do not
operate the compressor near the spray area.
WHEN YOU ARE FINISHED:
7. Set the “AUTO/O” lever to “O”.
8. Turn the regulator
outlet pressure to zero.
9. Remove the air tool or accessory.
10. Open the regulator and allow the air to slowly bleed
from the tank. Close the regulator when tank pressure
is approximately 20 psi.
11. Drain water from air tank.
WA TER WILL CONDENSE IN THE AIR
TANK. IF NOT DRAINED, WATER WILL
CORRODE AND WEAKEN THE AIR TANK
CAUSING A RISK OF AIR TANK RUPTURE.
counterclockwise
and set the
NOTE:
If drain cock valve is plugged, release
all air pressure. The valve can then be
removed, cleaned, then reinstalled.
5. Open the regulator by turning it clockwise. Adjust
the regulator to the correct pressure setting. Y our
compressor is ready for use.
12. After the water has been drained, close the drain
valve. The air compressor can now be stored.
8
MAINTENANCE
UNIT CYCLES AUT OMA TICALLY WHEN POWER IS ON. WHEN DOING MAINTENANCE, YOU MA Y BE EXPOSED TO VOLTAGE SOURCES, COMPRESSED AIR OR MOVING PARTS. PERSONAL INJURIES CAN
OCCUR. BEFORE PERFORMING ANY MAINTENANCE OR REPAIR, UNPLUG THE COMPRESSOR AND
BLEED OFF ALL AIR PRESSURE.
ALL MAINTENANCE AND REP AIR OPERA TIONS NOT LISTED MUST BE DONE BY A QUALIFIED SERVICE TECHNICIAN.
Air Filter - Inspection and Replacement
Hot surfaces. Risk of burn. Compressor
heads are exposed when filter cover is
removed. Allow compressor to cool prior to
servicing.
Keep the air filter clean at all times. Do not operate the compressor with the air filter removed.
A dirty air filter will not allow the compressor to operate at full
capacity. Before you use the compressor, check the air filter
to be sure it is clean.
Check Valve Cleaning - Replacement
Risk of personal injury. Manifold assembly contains
compressed air which can be hazardous.
Manifold gets hot during operation.
Before servicing:
•Unplug or disconnect electrical supply
to compressor.
•Bleed tank of pressure.
•Allow compressor to cool.
1. Release all air pressure from air tank and unplug outfit.
2. Remove shroud. (Key Nos. 1 and 2)
3. Loosen the top and bottom nuts and remove the outlet
tube. (Key Nos. 31, 33, and 34)
4. Remove the pressure release tube, fitting, and
connector. (Key Nos. 25, 26 and 27)
5. Unscrew the check valve (turn counterclockwise) using
a socket wrench. (Key No. 17)
6. Check that the valve disc moves freely inside the check
valve and that the spring holds the disc in the upper,
closed position. The check valve may be cleaned with a
solvent, such as paint and varnish remover.
7. Apply a Teflon based pipe sealant to the check valve
threads. Reinstall the check valve (turn clockwise).
8. Replace the pressure release tube and fitting.
9. Replace the outlet tube and tighten top and bottom nuts.
10. Replace the shroud.
Safety Valve - Inspection
If the safety valve does not work properly,
over-pressurization may occur, causing air tank
rupture or an explosion. 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.
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 possible 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.
Storage
Before you store the air compressor, make sure you do the
following:
1. Review the Maintenance and “Operating Procedures”
sections and perform maintenance as necessary. Be
sure to drain water from the air tank.
2. Protect the electrical cord and air hose from damage
(such as being stepped on or run over). Wind them
loosely around the compressor handle.
Store the air compressor in a clean and dry location.
9
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