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SEARS OWNER'S MANUAL CRAFTSHRNo PERMANENTLY L UBRI CA TED TANK MOUNTED TWIN CYLINDER AIR COMPRESSOR • SAFETYGUIDELINES • ASSEMBLY • OPERATION • MAINTENANCE • TROUBLESHOOTING • REPAIR PARTS IMPORTANT : Read the Safety Guidelines and All Instructions Carefully Before Operating . Sears , Roebuck and Co . , Hoffman Estates , IL 60179 U . S . A . MG2 - PERMTWIN Rev , 7 / 11 / 96
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TABLE OF CONTENTS Page 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 REMOVAL OF SHIPPING BOARDS AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 INSTALLATION AND BREAK - IN PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Location of Air Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Lubrication and Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Extension Cords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Voltage and Circuit Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Grounding Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Wiring Instructions - Permanently Mounted Compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 OPERATING PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Air Filter - Inspection and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Check Valve - Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Safety Valve - Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 HOW TO ORDER REPAIR PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
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SAFETY GUIDELINES = DEFINITIONS ] This manual contains informa - I _ DANGER I I _ CAUTION I tion that is important for you to URGENTSAFETYINFORMATION - A HAZARD Information for preventing damage to know and understand . This infor - equipment . THATWILL CAUSE SERIOUS INJURY OR LOSS mation relates to protectingYOUR OF LIFE SAFETY and PREVENTING EQUIPMENT PROBLEMS . To help you recognize this informa - [ _ WARNING I I NOTE I tion , we use symbols to the right . Please read the manual and pay Information that you should pay special IMPORTANT SAFETY INFORMATION - AHAZARD attention to these sections . attention to . THATMIGHTCAUSE SERIOUS INJURYOR LOSS OF LIFE . IMPORTANT SAFETY INSTRUCTIONS • SAVE THESE INSTRUCTIONS • IMPROPER OPERATION OR MAINTENANCE OFTHIS PRODUCT COULD RESULT IN SERIOUS INJURY AND PROPERTY DAMAGE . READ AND UNDERSTAND ALL WARNINGS AND OPERATING INSTRUCTIONS BEFORE USINGTHIS EQUIPMENT . WHAT TO WHAT COULD HAPPEN LOOK FOR HOW TO PREVENT IT Hot Parts The metal compressor components , such as mani - Avoid contact with metal components of the com - fold , tubes , etc . , become hot when the air compres - pressor during or immediately after operation . sor is running . If you touch them , you may be Reaching under or removing portions of the plastic seriously burned enclosures such as the filter cover and console cover exposes hot surfaces . Allow compressor to cool prior to servicing . Flammable It is normal for the motor and pressure switch to If spraying a flammable material , provide ample Vapors spark when compressor starts or stops . A spark can ventilation . Never spray in a closed area . There must be a flow of fresh air at all times . ignite vapors from gasoline or solvents , causing a fire or explosion . 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 . Air Tank Modifications to air compressor components in an Do not adjust , remove or tamper with the safety attempt to reach higher air pressure can cause the valve or pressure switch . If safety valve or pressure air tank to rupture or explode . switch replacement is necessary , a part with the same ratings must be used . Incompatability between tank and compressor will Never replace the air tank with a different model or cause the tank to rupture . a larger tank . Return to Authorized Service Center if replacement is required . Modifications to the air tank will cause it to Never drill into , weld or in any way modify the air weaken . tank . The tank may rupture or explode . If leaks develop due to corrosion or tank is damaged , return to Authorized Service Center for replacement .
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SAFETY GUIDELINES WHAT TO / HOW TO PREVENT IT LOOK FOR WHAT COULD HAPPEN [ / Never point any nozzle or sprayer toward a person Compressed air can propel dust , dirt or loose par - Compressed Air ticles it comes in contact with . These propelled or any part of the body . _ articles may cause serious injury or damage . Always wear safety goggles or glasses when using the air compressor . Always turn the air compressor off before attach - ing or removing accessories . Check the manufacturer's pressure rating for air Too much air pressure applied to air tools or acces - tools and accessories . Regulator outlet pressure sories can cause damage or risk of bursting . must never exceed the maximum pressure rating . NOTE : IF A REGULATOR IS NOT SUP - PLIED WITH YOUR COMPRESSOR , YOU MUST INSTALL ONE BEFORE USING AIR TOOLS AND ACCESSORIES WITH PRES - SURE RATINGS LESS THAN 200 PSIG . Always unplug the air compressor prior to mainte - Your air compressor is powered by electricity . Electricity nance or repair . Like any other electrically powered device , if it is not used properly it may cause electrical shock . Never use the air compressor outdoors when it is raining . Always plug the cord into an electrica ! outlet with the specified voltage and adequate fuse protection . It is normal for compressed air to contain toxic or Never directly inhale the compressed air produced Toxic Vapors irritating vapors . Such vapors are harmful if in - by this unit . haled . Certain materials you are spraying ( like paint , Read labels and safety data for al ! materials you weed killer , sand or insecticide ) can be harmful if spray . Follow all safety precautions . you inhale them . Use a mask or respirator if there is a chance of inhaling toxic sprayed materials . Masks and respi - rators 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 The solvents 1,1,1 - Trichloroethane and Meth - Unsuitable solvents listed at left ( read the label or data sheet ) , Solvents ylene Chloride can chemically react with alumi - do not use accessories that contain aluminum or num used in paint spray guns , paint pumps , etc . , and galvanized parts . You must either change the cause an explosion . These solvents can also react material you intend to spray , or use only stainless with galvanized components and cause corrosion steel spray equipment . and weakening of parts . This does not affect your air compressor - but it may affect the equipment being used .
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GLOSSARY CFM : Cubic feet per minute . Cut - In Pressure : While the motor is off , air tank pressure drops as you continue to use your accessory . When the tank SCFM : Standard cubic feet per minute ; a unit of measure pressure drops to a certain low level the motor wil ! restart of air delivery . automatically . The low pressure at which the motor auto - matically re - starts is called " ' cut - in pressure . " PSIG : Pounds per square inch gauge ; a unit of measure of pressure . Cut - Out Pressure : When you turn on your air compressor and it begins to run , air pressure in the air tank begins to ASME : American Society of Mechanical Engineers ; made , build . It builds to a certain high pressure before the motor tested , inspected and registered to meet the standards of the automatically shuts off - protecting your air tank from ASME . pressure higher than its capacity . The high pressure at which the motor shuts off is called " cut - out pressure . " U . L . Listed : This product is listed by Underwriters Labo - ratories , Inc . ( UL ) . Samples of this product have been evaluated by UL and meet the applicable UL standards for Safety . ACCESSORIES FOR USE WITH SEARS AIR COMPRESSORS • SPRAY GUNS ( various sizes ) " NAILER / STAPLERS • BLOW GUNS . VISCOSIMETER Decking • AIR CAULKING GUNS • AIR PRESSURE REGULATORS Farming • POWER WASHER • OIL FOG LUBRICATORS Roofing . SANDBLASTERS • AIR TOOLS : Siding • AIR BRUSHES Sanders Finishing • AIR LINE FILTERS Drills Carpentry • TIRE AIR CHUCKS Impact Wrenches Upholstery . PAINT TANKS Hammers Picture Framing • AIR TANKS • AIR HOSE : • DRAIN CLEANER • INFLATOR KITS 1 / 4 " , 5 / 16 " or 3 / 8 " I . D . • DUSTER GUN • QUICK CONNECTOR SETS in various lengths GENERAL INFORMATION You have purchased an air compressor unit consisting of a guns , air tools , caulking guns , grease guns , air brushes , 2 cylinder , single - stage air compressor pump and air tank . sandblaster , or inflating tires and plastic toys , spraying Included with portable compressors only are wheels , regu - weed killers , insecticides , etc . An air pressure regulator is lator , gauges , and handle . Stationary units are not supplied required for most of the applications . with regulators . An air filter which removes moisture and dirt from the compressed air should be used where applicable . This air compressor requires no oil . Now you can enjoy all the benefits of having an air compressor without ever These accessories can be purchased from most Sears stores having to purchase , add or change oil . or from the Sears Power Tool Catalog . Your air compressor can be used for operating paint spray
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DESCRIPTION OF OPERATION Safety Valve : If the pressure switch does not shut off the Air Compressor Pump : To compress air , the pistons move air compressor at its cut - out pressure setting , the safety up and down in the cylinders . On the downstroke , air is drawn in through the air intake valves . The exhaust valves valve will protect the tank against high pressure by " pop - ping out " at its factory set pressure ( slightly higher than the remain closed . On the upstroke of the piston , air is com - pressure switch cut - out setting ) . pressed . The intake valves close and compressed air is forced out through the exhaust valves , through the outlet tubes , through the check valve and into the air tank . Work - Regulator : The air pressure coming from the air tank is controlled by the regulator . Turn the regulator knob clock - ing air is not available until the compressor has raised the air wise to increase pressure and counter - clockwise to de - tank pressure above that required at the air outlet . crease pressure . To avoid minor readjustment after making a change in pressure setting , always approach the desired Check Valve : When the air compressor is operating , the pressure from a lower pressure . When reducing from a check valve is " open " , allowing compressed air to enter the air tank . When the air compressor reaches " cut - out " pres - higher to a lower setting , first reduce to some pressure less than that desired , then bring up to the desired pressure . sure , the check valve " closes " , allowing air pressure to remain inside the air tank . Depending on the air requirements of each particular acces - sory , the outlet regulated air pressure may have to be Pressure Release Valve : The pressure release valve lo - adjusted while operating the accessory . cated on the side of the pressure switch , is designed to Outlet Pressure Gauge : The outlet pressure gauge indi - automatically release compressed air from the compressor cates the air pressure available at the outlet side of the head and the outlet tube when the air compressor reaches regulator . This pressure is controlled by the regulator and " cut - ont " pressure or is shut off . If the air is not released , the motor will not be able to start . The pressure release valve is always less or equal to the tank pressure . See " Operating Procedures " . allows the motor to restart freely . When the motor stops running , air will be heard escaping from the valve for a few seconds . No air should be leaking when the motor is Tank Pressure Gauge : The tank pressure gauge indicates the reserve air pressure in the tank . running . Cooling System : This compressor contains an advanced Pressure Switch : The pressure switch automatically starts design cooling system . At the heart of this cooling system is the motor when the air tank pressure drops below the factory set " cut - in " pressure . It stops the motor when tl _ e air tank an engineered fan . It is perfectly normal for this fan to blow air through the vent holes in large amounts . You know that pressure reaches the factory set " cut - out " pressure . the cooling system is working when air is being expelled . Globe Valve : Turn the knob counter - clockwise to open the valve and clockwise to close . Tools Needed for Assembly • a 9116 " socket or open end wrench for attaching the wheels or removing shipping boards • a 3 / 8 " open end wrench or socket to tighten handle screws
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ASSEMBLY FOR PORTABLE COMPRESSORS Installing Wheels , Handles , Rubber Foot Strip It may be necessary to brace or support one end of the outfit when attaching the wheels and the rubber foot strip because the air compressor will have a tendency to THE WHEELS AND HANDLE DO NOT PRO - tip . VIDE ADEQUATE CLEARANCE , STABIL - ITY OR SUPPORT FOR PULLING THE UNIT . Install one shoulder bolt and one nut for each wheel UP AND DOWN STAIRS OR STEPS . THE using upper bolt hole for 30 and 33 gallon units . UNIT MUST BE LIFTED , OR PUSHED UP A Tighten securely . The outfit will sit level if the wheels RAMP . are properly installed . Attach the handle to the compressor saddle by inserting . Clean and dry air tank leg opposite wheels . Remove the the handle inside the compressor saddle and lining up protective paper strip from the adhesive backed rubber the two bolt holes on each side . Install the four screws , foot strip . Attach the rubber foot strip to the bottom of two on each side . Tighten securely . leg . Press firmly into place . REMOVAL OF SHIPPING BOARDS AND INSTALLATION FOR STATIONARY ( PERMANENTLY MOUNTED ) UNITS . This compressor is designed to be bolted directly to a It may be necessary to brace or support one level floor . Prior to installing , place the new washers side of the outfit when removing the ship - which are supplied with the compressor , between the ping boards because the air compressor will feet and floor such that the ring base at the bottom of the have a tendency to tip . tank does not contact the floor . Tighten bolts 15 - 20 ft . lbs . 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 . INSTALLATION AND BREAK - IN PROCEDURES Break - In Procedures Location of the Air Compressor The procedure is required only once , before the compressor Locate the air compressor in a clean , dry and well ventilated area . The air filter must be kept clear of obstructions which is put into service . Operate the compressor with the regulator or shut - offvalve fully open for 15 minutes . Make could reduce air delivery of the air compressor . The air sure that no pressure is building in the tank . After 15 compressor should be located at least 12 " away from the wall or other obstructions that will interfere with the flow of mintues , close the regulator or shut - off valve and allow the tank to fill to cut - out pressure and then the motor will stop . air . The air compressor head and shroud are designed to Your compressor is now ready for use . allow for proper cooling . Lubrication and Oil This unit needs no lubrication or oiling .
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Extension Cords The portable air compressor is equipped with a cord having a grounding wire with an appropriate grounding plug . The Use air hose instead of an extension cord to avoid voltage plug must be used with an outlet that has been installed and grounded in accordance with all local codes and ordinances . drop and power loss to the motor , and to prevent overheat - The outlet must have the same configuration as the plug . ing . See illustration . DO NOT USE AN ADAPTER . If an extension cord must be used , be sure it is : Inspect the plug and cord before each use . Do not use if • a 3 - wire extension cord that has a 3 - blade grounding there are signs of damage . plug , and a 3 - slot receptacle that will accept the plug on the product • in good condition • no longer than 50 feet IMPROPER GROUNDING CAN RESULT IN ELECTRICAL SHOCK . • 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 . ) 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 electrician . Voltage and Circuit Protection If repairing or replacing cord or plug , the grounding wire must be kept separate from the current - carrying wires . Refer to your Parts List Manual for the voltage and circuit Never connect the grounding wire to a fiat blade plug protction requirements of your compressor . Use only a fuse terminal . The grounding wire has insulation with an outer or circuit breaker that is the same rating as the branch circuit surface that is green - with or without yellow stripes . the air compressor is operated on . If the compressor is connected to a circuit protcted by fuses , use only dual If these grounding instructions are not completely under - element time delay fuses , as noted in that Service Bulletin . stood , or if in doubt as to whether the compressor is properly grounded , have the installation checked by a qualified Refer to Parts List Manual for your compressor . Certain air electrician . compressor models can be operated on a 15 amp circuit if : 1 . Voltage supply to circuit is normal . 2 . Circuit is not used to supply any other electrical needs ( lights , appliances , etc . ) . 120 Volt Models 240 Volt Models whne 3 . Extension cords comply with specifications . 4 . Circuit is equipped with a 15 amp circuit breaker or 15 amp time delay fuse . If any of the above conditions cannot be met , or if operation 20 AMP PLUG OUTLET 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 . ' - - o _ O _ GROUNDING - - , 4 GROUNDING J I J PIN PIN GROUNDING INSTRUCTION - Portable Compressors Wiring Instructions - Stationary ( Permanently Mounted ) Compressors RISK OF ELECTRICAL SHOCK . In the event of If your compressor is not equipped with a plug - in type a short circuit , grounding reduces the risk of power cord , perform electrical wiring according to the shock by providing an escape wire for the electric current . This air compressor must be following instructions : properly grounded .
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Refer to the Specification Chart in the Outfit Parts Bulletin for your compressor . RISK OF ELECTRICAL SHOCK . IMPROPER 2 . The supply line has the same electrical claaracteris - ELECTRICAL GROUNDING CAN RESULT IN tics ( voltage , cycle , phase ) as the motor . ELECTRICAL SHOCK . WIRING FORTHE PRES - SURE SWITCH SHOULD BE DONE BY A LI - Wiring must be such that lull motor nameplate voltage plus CENSED ELECTRICIAN IN ACCORDANCE WITH or minus 10 % is available at the motor terminals during NATIONAL AND LOCAL CODES AND ORDI - starting . Refer to local codes for recommended wire sizes NANCES . for correct wire size and maximum wire run ; undersize wire causes high amp draw and overheating to the motor . Install the compressor as close to the main power supply as possible . This practice will avoid using long lengths of electrical wiring for the power supply which can cause power loss to the motor . When connecting wires , make sure that : Electrical wiring must be located away from hot suHaces such as manifold assembly , compres - sor outlet tubes , heads , or cylinders . 1 . The amperage rating of the electrical box is adequate . OPERATING PROCEDURES , Before attaching air hose or accessories , make sure the 6 . Always operate the air compressor in well - ventilated OFF / AUTO lever is set to " OFF " and the air regulator areas ; free of gasoline or other solvent vapors . Do not or globe valve is closed . operate the compressor near the spray area . 2 . Attach hose and accessories . When you are finished : 7 . Set the " OFF / AUTO " lever to " OFF " . 8 . Turn the regulator counterclockwise and set the outlet pressure to zero . TOO MUCH AIR PRESSURE CREATES A HAZ - 9 . Remove the air tool or accessory . ARDOUS RISK OF BURSTING . CAREFULLY 10 . Open the regulator and allow the air to slowly bleed FOLLOW STEPS 3 AND 5 EACH TIME THE from the tank . Close the regulator when tank pressure COMPRESSOR IS USED . is approximately 20 psi . 11 . Drain water from air tank . Compressed air from the outfit may contain water condensation . Do not spray until - WATER WILL CONDENSE IN THE AIR tered air at an item that could be damaged . TANK . IF NOT DRAINED , WATER WILL CORRODE AND WEAKEN THE AIR Some air operated tools or devices may require filtered air . Read the instructions for TANK CAUSING A RISK OF AIR TANK the air tool or device . RUPTURE . . Check the manufacturer's maximum pressure rating for With tank pressure at approximately 20 psi , open the drain air tools and accessories . The regulator outlet pressure cock or drain valve . must never exceed the maximum pressure rating . If your compressor is not supplied with a regulator with gauge , NOTE : instal ! one before using accessories . If drain cock valve is plugged , release all air . The valve can then be removed , . Turn the OFF / AUTO lever to " AUTO " and allow tank cleaned , then reinstalled . pressure to build . Motor will stop when tank pressure reaches " cut - out " pressure . 12 . After the water has been drained , close the drain cock or drain valve . The air compressor can now be stored . . Open the regulator by turning it clockwise . Adjust the regulator to the correct pressure setting . Your compressor is ready for use .
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MAINTENANCE UNIT CYCLES AUTOMATICALLY WHEN POWER IS ON . WHEN DOING MAINTENANCE , YOU MAY 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 REPAIR OPERATIONSNOT LISTED MUST BE DONE BY QUALIFIED SERVICE PERSONNEL . Air Filter - Inspection and Replacement Check Valve Replacement - Portable Compressors Hot surfaces . Risk of burn . Compressor Risk of personal injury . Mainfold assembly heads are exposed when filter cover is contains compressed air which can be hazard - removed . Allow compressor to cool prior ous . Manifold gets hot during operation . Before servicing : • Unplug or disconnect electrical to servicing . _ @ _ supply to compressor . • Bleed tank of pressure . Keep the air filter clean at all times . Do not operate the l . Release all air pressure from air tank and unplug outfit . compressor with the air filter removed . 2 . Remove shroud . A dirty air filter will not allow the compressor to operate at 3 . Loosen the top and bottom nuts and remove the outlet full capacity . Before you use the compressor , check the air tube . filter to be sure it is clean . 4 . Remove the pressure release tube and fitting . 5 . Unscrew the check valve ( turn counterclockwise ) us - ing a socket wrench . 6 . Check that the valve disc moves freely inside the check valve and that the spring holds the disc in the upper , Check Valve - Replacement - Stationary closed position . The check valve may be cleaned with ( Permanently Mounted ) Compressors a solvent , such as paint and varnish remover . 7 . Apply sealant to the check valve threads . Reinstall the 1 . Release all air pressure from air tank and disconnect check valve ( turn clockwise ) . outfit from supply circuit . 8 . Replace the pressure release tube and fitting . 2 . Remove rear shroud . 9 . Replace the outlet tube and tighten top and bottom nuts . 3 , Remove tubes and compression fittings at the tee and 10 . Replace the shroud . remove the tee from the check valve . 4 . Remove the pressure release tube and fitting from the check valve . Safety Valve - Inspection 5 . Unscrew the check valve ( turn counterclockwise ) us - ing a socket wrench . 6 . The check valve may be cleaned with a solvent , such as paint and varnish remover . 7 . Apply sealant to the check valve threads . Reinstall the If the safety valve does not work properly , over - pressurization may occur , causing air check valve ( turn clockwise ) . DO NOT OVER - TIGHTEN . tank rupture or an explosion . Before starting compressor , pull the ring on the safety valve 8 . Replace the pressure release tube , fitting and tee . to make sure that the safety valve operates 9 . Replace the outlet tubes and tighten fittings . freely . If the valve is stuck or does not operate 10 . Replace the shroud . smoothly , it must be replaced with the same 11 . Connect compressor to supply circuit . type of valve . ! 0
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MAINTENANCE ( cont'd ) Motor Storage The motor has an automatic reset thermal overload protec - Before you store the air compressor , make sure you do the tor . If the motor overheats for any reason , the overload following : protector will shut off the motor . The motor must be allowed to cool down before restarting . The compressor 1 . Review the " Maintenance " and " Operating Procedures " will automatically restart after the motor cools . sections and perform maintenance as necessary . Be sure to drain water from the air tank . If the overload protector shuts the motor off frequently , 2 . Protect the electrical cord and air hose from damage check for a possible voltage problem . Low voltage can also ( such as being stepped on or run over ) . Wind them be suspected when : loosely around the compressor handle . . The motor does not : get up to full power or speed . Store the air compressor in a clean and dry location . 2 . Fuses blow out when starting the motor ; lights dim and remain dim when motor is started and is running . 11
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TROUBLESHOOTING GUIDE PERFORMING REPAIRS MAY EXPOSE VOLTAGE SOURCES , MOVING PARTS OR COMPRESSED AIR SOURCES . PERSONAL INJURY MAY OCCUR . PRIOR TO ATTEMPTING ANY REPAIRS , UNPLUG THE COMPRESSOR AND BLEED OFF TANK AIR PRESSURE . PROBLEM CAUSE CORRECTION Pressure switch does not shut off mo - Excessive tank pressure - safety Move the pressure switch lever to the " OFF " posi - tion . If the outfit doesn't shut off , and the electrical valve pops off . tor when compressor reaches " cut - out " pressure . contacts are welded together , replace the pressure switch . Return the outfit to Sears Service Center to check and Pressure switch " cut - out " too high . adjust , or replace switch . Air leaks at fittings . Tube fittings are not tight enough . Tighten fittings where air can be heard escaping . Check fittings with soapy water solution . DO NOT OVER - TGHTEN . A defective check valve results in a constant air leak Air leaks at or inside check Defective or dirty check valve . valve . at the pressure release valve where there is pressure in the tank and the compressor is shut off . Remove and clean or replace check valve . Air leaks at pressure switch re - Defective pressure switch release Remove and replace the release valve . lease valve . valve . If the contacts are good , check to see if the pin in the bottom of the pressure release valve is stuck . If it does not move freely , replace the valve . Defective check valve . A defective check valve results in a 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 check valve . Air leaks in air tank or at air Defective air tank . Air tank must be replaced . Do not repair the leak . tank welds . DO NOT DRILL INTO , WELD OR OTHERWISE MODIFY AIR TANK OR IT WILL WEAKEN . THE TANK CAN RUPTURE OR EXPLODE . Air leaks between head and Leaking seal . Torque head screws to 8 ft . lbs . If this does not stop valve plate , leak , replace seal . Pressure reading on the regu - It is normal for " some " pressure drop If there is an excessive amount of pressure drop when to occur . the accessory is used , adjust the regulator following lated pressure gauge drops when the instructions on page 6 . an accessory is used . NOTE Adjust the regulated pressure under flow conditions ( while accesory is being used ) . Air leak from safety valve . Possible defect in safety valve . Operate safety valve manually by pulling on ring . If valve still leaks , it should be replaced . Knocking Noise Defective check valve . Remove and clean , or replace . 12
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TROUBLESHOOTING GUIDE ( Continued ) CORRECTION PROBLEM CAUSE . . . . . . . . . . . . Decrease amount of air usage . Compressor is not supplying ] Prolonged excessive use of air . enough air to operate accesso - lICompressor Check the accessory air requirement . If it is higher ries . is not large enough for air requirement . than the SCPM or pressure supplied by your air compressor , you need a larger compressor . Restricted air intake filter . Clean or replace air intake filter . Do not operate the air compressor in the paint spray area . Hole in hose . Check and replace if required . Check valve restricted . Remove and clean , or replace . Air leaks . Tighten fittings . ( See Air Leaks Section of Trou - bleshooting Guide . ) Motor will not run or restart . Let motor cool off and overload switch will auto - Motor overload protection switch has tripped . matically reset . Tank pressure exceeds pressure switch Motor will start automatically when tank pressure " cut - in " pressure . drops below " cut - in " pressure of pressure swilch . Wrong gauge wire or length of exten - _ ' heck for proper gauge wire and cord length . sion cord . Remove and clean , or replace . Check valve stuck open . Loose electrical connections . Check wiring connection inside pressure switch and terminal box area . Return to Sears Service Center for inspection or Possible defective motor or capacitor . replacement , if necessary . Have checked at Sears Service Center . Do not oper - Paint spray on internal motor parts . ate the compressor in the paint spray area . See flammable vapor warning . 1 . Check fuse box for blown fuse and replace , if Fuse blown , circuit breaker tripped . 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 low voltage conditions and / or proper extension cord . 4 . Disconnect the other electrical appliances afromnch circuit or operate the compressor in its own br circuit . Bleed the line by pushing the lever on the pressure Pressure release valve on pressure switch to the " off " position ; if the valve does nut switch has not unloaded head pressure . open , replace it . Broken exhaust valve . Remove head and valve plate , inspect and replace if necessary . Dirty or damaged regulator internal Clean or replace regulator , or internal parts . Regulator knob continuous air _ arts . leak . Regulator will not shut off at air outlet . 13
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SERVICE NOTES 14
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SERVICE NOTES 15
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CRRFTSMRNo SEARS PERMANENTLY LUBRICATED OWNER'S TANK MOUNTED MANUAL TWIN CYLINDER AIR COMPRESSOR For the repair or replacement parts you need Call 7 am - 7 pm , 7 days a week When requesting service or ordering ( 1 - 800 - 366 - 7278 ) parts , always provide the following information : = Model Number For in - home major brand repair service Call 24 hours a day , 7 days a week , Part Number • Part Description 1 - 800 - 4 - REPAIR • Name of item ( 1 - 800 - 473 - 7247 ) For the location of a Sears Parts and Repair Center in your area Call 24 hours a day , 7 days a week FULL ONE YEAR 1 - 800 - 488 - 1222 WARRANTY AIR COMPRESSOR If this air compressor fails due to a defect in material or workmanship within one year For information on purchasing a Sears A from the date of purchase , RETURN IT TO Maintenance Agreement or to inquire THE NEAREST SEARS REPAIR CENTER THROUGHOUT THE UNITED STATES about an existing Agreement AND SEARS WILL REPAIR IT , FREE OF call 9 am - 5 pm , Monday - Saturday CHARGE . If this air compressor is used for commer - 1 - 800 - 827 - 6655 cial or rental purposes , the warranty will apply for ninety days from the date of purchase . This warranty gives you specific legal dghts America's Repair Spac ; atists , and you may have other rights which vary from state to state . Sears , Roebuck and Co . , Hoffman Estates , IL 60179 U . S . A .
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