Page 1
SK RS
GENERAL MANUAL FOR
CRAFTSMAN
NOTE: For identification of Re-
pair Parts, see separate Parts
List Manual.
PERMANENTLY LUBRICATED
TANK MOUNTED
AIR COMPRESSOR
Record in the spaces provided.
(1) The model number which can be
found on the maintenance label on
the top of the motor coveroronthe
tank.
(2) The code number which can be
found on the foil label onthe rear of
the air tank.
(3) The Manufacturers Number is lo-
cated onthe metaldata platewhich
is welded onto the backside of the
air tank. (This data plate is painted
the same color as the tank.)
IMPORTANT:
Read the Safety Guidelines
and All Instructions
Carefully Before Operating
MG-OILFREE 1/20/94 I
Retain these numbers for future
reference.
SAFETY GUIDELINES
ASSEMBLY
OPERATION
MAINTENANCE
TROUBLESHOOTING
REPAIR PARTS
Sears, Roebuck and Co., Chicago, IL 60684 U.S.A.
Model No.
Code No.
I Mfg. No.
Page 2
TABLE OF CONTENTS
Page
WARRANTY .......................................................................................................................................... 2
SAFETY GUIDELINES ......................................................................................................................... 3
WARNING CHART ............................................................................................................................... 3
GLOSSARY ........................................................................................................................................... 5
ACCESSORIES FOR USE WITH SEARS AIR COMPRESSORS .................................................. 5
GENERAL INFORMATION .................................................................................................................. 5
DESCRIPTION OF OPERATION ....................................................................................................... 6
ASSEMBLY ........................................................................................................................................... 7
INSTALLATION AND BREAK-IN PROCEDURES ............................................................................ 7
Location of Air Compressor ........................................................................................................... 7
Lubrication and Oil ......................................................................................................................... 7
Extension Cords ............................................................................................................................. 7
Voltage and Circuit Protection ....................................................................................................... 7
Grounding Instructions ................................................................................................................... 8
Break-in Procedure ........................................................................................................................ 8
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
HOW TO ORDER REPAIR PARTS .................................................................................................. 16
FULL ONE YEAR WARRANTY ON AIR COMPRESSORS
tfthis air compressor fails due to a defect in material or workmanship within one year from the date of purchase, RETURN
ITTO THE NEAREST SEARS SERVICE CENTER/DEPARTMENT THROUGHOUT THE UNITED STATES AND SEARS
WILL REPAIR IT, FREE OF CHARGE.
Ifthis air compressoris used for commercialor rental purposes, thewarranty will applyfor ninety days from the date of
purchase.
This warrantygives you specific legal rights and you may have other rights which vary from state to state.
Sears, Roebuck and Co., Sears Tower, Dept. 731CR-W, Chicago, IL 60684
Page 3
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 INFORMATION - A
HAZARD THAT 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
WHAT COULD HAPPEN
Themetalcompressorcomponentssuchasmanifold,
tubes,etc,becomehotwhentheaircompressorisrunning.
Ifyoutouchthem, you
may be seriously burned.
IMPORTANT SAFETY INFORMATION -
A HAZARD THAT MIGHT CAUSE
SERIOUS INJURY OR LOSS OF LIFE.
NOTE
Information that you should pay special
attention to.
HOW TO PREVENT IT
Avoid contact withmetal components ofthe compressor
during or immediately after operation. Reaching under or
removing portions of the plastic enclosures such as the
console cover exposes hot surfaces. Allowcompressorto
cool prior to servicing.
Flammable
Vapors
Air Tank
It isnormal 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.
Modifications to air compressor components in an
attempt to reach higher air pressure can cause the air
tank to rupture or explode.
Incomparability between tank and compressor will
cause the tank to rupture.
Modifications to the airtank will cause it to weaken.
If spraying a flammable material, provide ample ven-
tilation. 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.
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 Authorized Service Center if
replacement is required.
Never drill into weldor in anyway modify theairtank.
Thetank may rupture or explode. Ifleaks deveop due
tocorrosion or tank is damaged, return to Authorized
Service Center for replacement.
Page 4
SAFETY GUIDELINES
WHAT TO
LOOK FOR WHAT COULD HAPPEN HOW TO PREVENT IT
Compressed
Air
Electricity
Compressed air can propel dust, dirt or loose particles
it comes in contact with. These propelled particles
may cause serious injury or damage.
Too much air pressure applied to air tools or acces-
sories can cause damage or risk of bursting.
Your air compressor is powered by electricity. Like
any other electrically powered device, ifit is not used
properly it may cause electrical shock,
Never point any nozzle or sprayer toward a personor
any part of the body.
Alwayswear safetygoggles or glasseswhen usingthe
air compressor.
Alwaysturn the aircompressoroffbefore attachingor
removing accessories.
Check the manufacturer's pressure rating for air
tools and accessories. Regulator outlet pressure
must never exceed the maximum pressure rating.
NOTE: IF A REGULATOR IS NOT SUPPLIED
WITH YOUR COMPRESSOR, YOU MUST
INSTALL ONE BEFORE USING AIR TOOLS AND
ACCESSORIES WITH PRESSURE RATINGS
LESS THAN 200 PSIG.
Always unplug the air compressor prior to mainte-
nance 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.
Toxic Vapors
Unsuitable
Solvents
It is normal for compressed air to contain toxic or
irritating vapors, Such vapors are harmful if inhaled.
Certain materials you are spraying (like paint, weed
killer, sand or insecticide) can be harmful ifyou 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 galva-
nized components and cause corrosion and weaken-
ing of parts. This does not affect your air compressor
- but it may affect the equipment being used.
Never directly inhale the compressed air produced by
this unit.
Readlabels and safety datafor allmaterialsyouspray.
Follow all safety precautions.
Use amask or respirator ifthere isachanceofinhaling
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 asafety expert or industrial hygienist ifyou arenot
sure about the use of a certain mask or respirator.
Ifthe 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 pads.
You must either change the material you intend to
spray, or use only stainless steel spray equipment.
Page 5
GLOSSARY
CFM: Cubicfeet per minute.
SCFM: Standard cubic feet per minute; a unit of measure
of air delivery.
PSlG: Pounds per square inch gauge; a unit of measure
of pressure.
ASME: American Society of Mechanical Engineers;
made, tested, inspected and registered to meet the
standards of the ASME.
U.L. Listed: This productis Listed by Underwriters Labora-
tories, Inc. (UL). Samples of this product have been evalu-
ated by UL and meet applicable UL Standards for Safety.
Cut-In Pressure: While the motor is off, air tank pressure
drops as you continue to use youraccessory.When thetank
pressure drops to a certain low level the motor will restart
automatically. The low pressure atwhich the motor automat-
ically re-starts is called "cut-in pressure."
Cut-Out Pressure: When you turn on your air compres-
sor 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 itscapacity. The high pressure
at which the motor shuts off is called "cut-out pressure."
ACCESSORIES FOR USE WITH
SEARS AIR COMPRESSORS
The following accessories are available through full-line Sears stores.
•SPRAY GUNS
•BLOW GUNS
•AIR CAULKING GUNS
-PNEUMATIC POWER
WASH ERS
.SANDBLASTERS
-AIR BRUSHES
•AIR LINE FILTERS
•TIRE AIR CHUCKS
•PAINT TANKS
•AIR TANKS
•INFLATOR KITS
•QUICK CONNECTOR SETS
(various sizes)
.VISCOSIMETER
*AIR PRESSURE REGULATORS
•OIL FOG LUBRICATORS
•AIR TOOLS:
Sanders
Drills
Impact Wrenches
Hammers
•AIR HOSE:
1/4", 5/16" or 3/8" I.D.
in various lengths
GENERAL INFORMATION
You have purchased an air compressor unit consisting of
a one cylinder, single-stage air compressor pump and air
tank. Included are an air hose, tire air chuck, 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, caulking guns, grease guns, air brushes,
*NAILER/STAPLERS
Decking
Farming
Roofing
Siding
Finishing
Carpentry
Upholstery
Picture Framing
•DRAIN CLEANER
•DUSTER GUN
sandblaster, or inflating tires and plastic toys, spraying
weed killers, insecticides, etc. An air pressure regulator is
required for most of the applications.
An air filter which removes moisture and dirt from com-
pressed air should be used where applicable.
These accessories can be purchased from most Sears
Parts Departments.
Page 6
DESCRIPTION OF OPERATION
Air Compressor Pump: To compress air, the piston
moves up and down inthe cylinder. On thedownstroke, air
isdrawn inthrough the air intake valves. The exhaust valves
remain closed. On the upstroke of the piston, air is
compressed. The intake valves closeandcompressed airis
forced out through the exhaust valves, through the outlet
tube, throughthe checkvalve and intotheair 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", 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.
PressureReleaseValve: The pressure release valvelocated
on theside of the pressure switch, isdesigned to automat-
icallyrelease compressed airfrom the compressorhead and
the outlet tube when the air compressor reaches "cut-out"
pressure or is shut off. If the air is not released, the motor
willnot be able to start. The pressure release valve allows
the motor to restart freely. When the mQtor stopsrunning,
air willbe heard escaping from the valve for a few seconds.
No air should be leaking when the motor isrunning.
PressureSwitch: The pressure switchautomatically starts
themotorwhen theair tank pressure drops belowthefactory
set "cut-in" pressure. It stops the motor when the air tank
pressure reaches the factory set "cut-out" pressure.
SafetyValve: Ifthe pressure switch does notshutoffthe air
compressor at itscut-out pressure setting,the safety valve
willprotect thetank against high pressure by=popping out"
at itsfactory set pressure (slightlyhigherthan the pressure
switchcut-out setting).
Regulator: The air pressure coming from the air tank is
controlled by the regulator. Turn the regulator knobclock-
wise to increase pressure and counter-clockwise to de-
crease 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 bringup to the
desired pressure. Depending on the air requirements of
each particular accessory, the outlet regulated air pres-
sure may have to be adjusted while operating the acces-
sory.
Outlet Pressure Gauge: The outlet pressure gauge indi-
cates the air pressure available at the outlet side of the
regulator. This pressure is controlled by the regulatorand
is always less or equal to the tank pressure. See
"Operating Procedures".
Tank Pressure Gauge: The tank pressure gauge indicates
the reserve air pressure inthe tank.
Cooling System: This compressor contains an advanced
design cooling system.At the heartofthis coolingsystem is
an engineered fan. It isperfectly normal for thisfan toblow
air through the vent holes inlarge amounts. You know that
the cooling system isworking when air is being expelled.
Tools Needed for Assembly
• a 9/16" socket or open end wrench for attaching the wheels
• a 3/8" open end wrench or socket to tighten handle screws
Page 7
ASSEMBLY
Installing Wheels, Handles, Rubber
Foot Strip
THE WHEELS AND HANDLE DO NOT PRO-
VIDE ADEQUATE CLEARANCE, STABILITY
OR SUPPORT FOR PULLING THE UNIT UP
AND DOWN STAIRS OR STEPS. THE UNIT
MUSTBE LIFTED, ORPUSHED UPARAMP.
Attach the handle tothe compressor saddle by inserting
the handle inside the compressor saddle and lining up
the two bolt holes on each side. Install the four screws,
two on each side. Tighten securely.
Itwill be necessary to brace or supportone side
ofthe outfitwhen installing thewheels because
the compressorwlll have a tendency to tip.
Install one shoulder bolt and one nut for each wheel
.
using lower bolt hole for 12 gallon units and upper bolt
hole for 25 gallon units.
Tighten securely. The outfit will sit level if the wheels
are properly installed.
.
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.
Removing Shipping Boards and Installing
Rubber Feet
Itwill be necessary to brace or support one side
ofthe outfitwhen removing the shipping boards
and installing rubber feet because the air com-
pressor will have a tendency to tip.
.
Using the 9/16 wrench, remove the four screws hold-
ing the shipping boards in place. Save these screws.
,
Using thesame screws, install therubber feet supplied
with the compressor.
INSTALLATION AND 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 air. The air compressor head and
shroud are designed to allow for proper cooling.
Lubrication and Oil
This unit needs no lubrication or oiling.
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
• ingood 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 your Parts List Manual for the voltage and circuit
protction 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 compres-
sor is connected to a circuit protcted by fuses, use only
dual element time delay fuses, as noted in that Service
Bulletin.
7
Page 8
RefertoParts 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.
If repairing cord or plug, the grounding wire must be kept
separate from the current-carrying wires. Neverconnectthe
grounding wire to a flat blade plug terminal. The grounding
wire has insulation with an outer surface that isgreen- with
or without yellow stripes.
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.
Ifany of the above conditions cannot bemet, or ifoperation
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.
GROUNDING INSTRUCTIONS
RISKOR ELECTRICAL SHOCK. In the event of a
shortcircuit, grounding reduces the risk of shock by
providing an escape wire for the electric current.
This air compressor must be properly grounded.
If these grounding instructions are not completely under-
stood, or if in doubt as to whether the compressor is
properly grounded, have the installation checked by a
qualified electrician.
120 Volt Models
White
GROUNDING J _ PIN
PIN
240 Volt Models
2OAMP PLUG OUTLET
Break-in Procedure
The portable air com pressor is equipped with acord 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 localcodes 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 RESULTIN ELEC-
TRICAL 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 aqualified electrican.
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.
1. Set the pressure switch OFF/AUTO lever in the
"OFF" position.
2. Plug the power cord into the correct branch circuit
receptacle.
3. Turn the regulator clockwise, opening it fully, to
prevent air pressure build-up in the tank.
4. Move the OFF/AUTO lever to "AUTO". The com-
pressor will start.
5. Run the compressor for 15 minutes. Make sure the
regulator is open and there is no tank pressure build-
up.
6. After 15 minutes, close the regulator by turning it
counterclockwise. The air tank will fill to cut-out
pressure and then the motor will stop.
Refer to "Operating Procedures".
Page 9
OPERATING PROCEDURES
1. Before attaching air hose or accessories, make sure
the OFF/AUTO lever is set to "OFF" and the air
regulator is closed.
2. Attach hose and accessories.
TOO MUCH AIR PRESSURE CREATES
A HAZARDOUS RISK OF BURSTING.
CAREFULLY FOLLOW STEPS 3 AND 5
EACH TIME THE COMPRESSOR IS
USED.
Compressed air from the outfit may contain
water condensation. Do not spray unfil-
tered 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 rat-
ing for air tools and accessories. The regulator
outlet pressure must never exceed the maximum
pressure rating. If your compressor is not supplied
with a regulator with gauge, install one before
using accessories.
4. Turn the OFF/AUTO 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-venti
lated areas; free of gasoline or other solvent
vapors.
Do not operate the compressor near the spray
area.
Whenyou are finished:
7. Set the =OFF/AUTO" lever to "OFF".
8. Turn the regulator counterclockwise and set the out-
let 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.
WATER WILL CONDENSE IN THE AIR TANK.
IF NOT DRAINED, WATER WILL CORRODE
AND WEAKEN THE AIR TANK CAUSING A
RISK OF AIR TANK RUPTURE.
With tank pressure at approximately 20 psi, open the
drain cock or drain valve.
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 itclockwise. Adjust the
regulator to the correct pressure setting. Your com-
pressor is ready for use.
12. After the water has been drained, close
drain cock or drain valve. The air compressor
can now be stored.
Page 10
MAINTENANCE
UNIT CYCLES AUTOMATIOALLYWHEN POWER IS ON. WHEN DOING MAINTENANCE, YOU MAY BE EXPOSED
TOVOLTAGE SOURCES, COMPRESSEDAIROR MOVING PARTS. PERSONAL INJURIES CAN OCCUR. BEFORE
PERFORMING ANY MAINTENANCE OR REPAIR, UNPLUG THE COMPRESSOR AND BLEED OFF ALL AIR
PRESSURE.
ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED MUST BE DONE BY
QUALIFIED SERVICE PERSONNEL.
Air Filter- Inspection and Replacement 10. Replaceconsolecover.
Safety Valve - Inspection
Hot surfaces. Risk of burn. Compressor
heads are exposed when filter cover is
removed. Allow compressor to cool prior
to servicing. _ _
NlteF
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.
Niter Retainer
Check Valve - Replacement
Risk of personal injury. Mainfold 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.
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. Ifthe valve Is stuckor 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.
1. Release al{ air pressure from air tank and unplug
outfit.
2. Remove console cover.
3. Loosenlower outlettube nut thatsecures outlettubeto
the upper manifold section.
4. Remove the six screws securing the upper manifold
section to the lower section.
5. Lift upper manifold assembly and invert so that the
flapper valve and o-ring are exposed.
6. Remove the two small screws securing the flapper
valve and restrictor.
7. Replace flapper valve and re-assemble restrictor and
two screws.
8. Assemble upper manifold assembly to the lower
section. Make sure the o-ring is retained in the upper
section as it is inverted and the outlet tube slides into
the upper section. Tighten six screws.
9. Tighten the lower outlet tube nut.
10
2. Fuses blow out when starting the motor; lights dim
Storage
Before you store theair compressor, make sure you do
the following:
1. Review the "Maintenance" and "Operating Proce-
dures" sections andperform maintenance as neces-
sary. Be sure to drain water from the air tank.
2. Protectthe 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.
Page 11
TROUBLESHOOTING GUIDE
PERFORMING REPAIRS MAY EXPOSE VOLTAGE SOURCES, MOVING PARTS OR COM-
PRESSED AIR SOURCES. PERSONAL INJURY MAY OCCUR. PRIOR TO ATTEMPTING ANY
REPAIRS, UNPLUG THE COMPRESSOR AND BLEED OFF TANK AIR PRESSURE.
PROBLEM
Excessive tank pressure- safety
valve pops off.
Air leaks at fittings.
Air leaks at pressure switch re-
lease valve.
CAUSE
Pressure switch does not shut off motor
when compressor reaches "cut-out"
pressure.
Pressure switch "cut-out" too high.
Tube fittings are not tight enough.
Defective pressure switch release
valve.
Defective flapper valve in mani-
fold.
Check valve seat damaged.
CORRECTION
Move the pressure switch lever to the "OFF" position.
If the outfit doesn't shut off, and the electrical contacts
are welded together, replace the pressure switch.
Return the outfit to Sears Service Center to check
and adjust, or replace switch.
Tighten fittings where air can be heard escaping.
Check fittings with soapy water solution. DO NOT
OVERTIGHTEN.
Remove and replace the release valve.
Check to see if the pin inthe bottom of the pressure
release valve is stuck. If it does not move freely,
replace the valve,
A defective flapper valve results ina constant air leak
at the pressure release valve when there is pressure
in the tank and the compressor is shut off. Remove
and clean or replace valve.
Inspect and replace upper manifold assembly.
Air leaks in airtank orat air tank
Defective air tank,
Air tank must be replaced. Do not repair the leak.
welds.
DO NOT DRILL INTO, WELD OROTHERWISE
MODIFYAIRTANKOR ITWlLLWEAKEN.THE
TANK CAN RUPTURE OR EXPLODE.
Air leaks between head and Leaking seal. Torque head screws to 8 ft. Ibs. If this does not
valve plate, stop leak, replace seal.
Pressure reading on the regu-
lated pressure gauge drops
when an accessory is used.
tt is normal for "some" pressure drop
to occur.
If there is an excessive amount of pressure drop
when the accessory is used, adjust the regulator
following the instructions on page 6.
NOTE
Adjust the regulated pressure under flow condi-
tions (while accesory is being used).
11
Page 12
TROUBLESHOOTING GUIDE (Continued)
PROBLEM
Air leak from safety valve.
Knocking Noise
Compressor is not supplying
enough air to operate accesso-
ries.
Motor will not run or restart.
CAUSE
Possible defect in safety valve.
Defective check valve.
Prolonged excessive use of air.
Compressor is not large enough for air
requirement.
Restricted air intake filter.
Hole in hose.
Check valve restricted.
Air leaks.
Motor overload protection switch has
tripped.
Tank pressure exceeds pressure
switch "cut-in" pressure.
CORRECTION
Operate safety valve manually by pulling on ring. If
valve still leaks, it should be replaced.
Remove and clean, or replace.
Decrease amount of air usage.
Check the accessory air requirement. If it is higher
than the SCFM or pressure supplied by your air
compressor, you need a larger compressor.
Clean or replace air intake filter. Do not operate the
air compressor in the paint spray area.
Check and replace if required.
Remove and clean, or replace.
Tighten fittings. (See Air Leaks Section of Trou-
bleshooting Guide.)
Let motor cool off and overload switch will automati-
cally reset.
Motor will start automatically when tank pressure
drops below "cut-in" pressure of pressure switch.
Wrong gauge wire or length of exten-
sion cord.
Check valve stuck open.
Loose electrical connections.
Possible defective motor or capacitor.
Paint spray on internal motor parts.
Fuse blown, circuit breaker tripped.
Pressure releasevalve onpressure switch
has not unloaded head pressure.
Check for proper gauge wire and cord length.
Remove and clean, or replace.
Check wiring connection inside pressure switch and
terminal box area.
Return to Sears Service Center for inspection or
replacement, if necessary.
Have checked at Sears Service Center. Do not
operate the compressor in the paint spray area. See
flammable vapor warning.
1. Check fuse box for blown fuse and replace, if
necessary. Reset circuit breaker. Do not use a
fuse or circuit breaker with higher rating than that
specified for your particular branch circuit.
2. Check for proper fuse. Only time delay fuses are
acceptable.
3. Check for Iowvoltage conditions and/or proper exten-
sion cord.
4. Disconnect the other electrical appliances from
circuit or operate the compressor in its own
branch circuit.
BleedtheUneby pushingtheleveronthepressureswitch
tothe"off"position;ifthevalvedoesnotopen,replaceit.
Broken exhaust valve. Inspect and replace if necessary.
Regulator knob continuous air Dirty or damaged regulator internal Cleanorreplaceregulator, orinternalparts.
leak. Regulator will not shut off parts.
at air cutlet.
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SERVICE NOTES
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SERVICE NOTES
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SERVICE NOTES
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SEARS
CRA_SMAN
GENERAL MANUAL FOR
PERMANENTLY LUBRICATED
TANK MOUNTED
AIR COMPRESSOR
SERVICE
MODEL NO.
HOWTO ORDER
REPAIR PARTS
Now that you have purchased your Sears Air Compressor, should a
need ever exist for repair parts or service, simply contact any Sears
Service Center and most Sears stores. Be sure to provide all pertinent
facts when you call or visit.
The model number of your Sears Air Compressor can be found on the
top of the motor cover or on the tank.
WHEN ORDERING REPAIR PARTS, ALWAYS GIVE THE FOL-
LOWING INFORMATION:
• PART NUMBER • PART DESCRIPTION
• MODEL NUMBER • NAME OF ITEM
All parts listed may be ordered from any Sears Service Center and
most Sears stores.
If the parts you need are not stocked locally, your order will be
electronically transmitted to a Sears Repair Parts Distribution Center
for handling.
Sears, Roebuck and Co., Chicago, IL 60684 U.S.A.
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