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MANUAL
MODEL NO.
919.176731
919.176831
IMPORTANT:
Read the Safety Guidelines and Alt instructions
Carefully Before Operating
CRAFTSMAN AIR COMPRESSOR
ASSEMBLY
OPERATION MAINTENANCE REPAIR PARTS
Record in the spaces provided.
(1)The model number which can be found on the label on the rear of the air tank.
(2)The code number which can be found on the foil label on the rear of
the air tank.
(3)The Manufacturers Number (MFG...) (ASME Code Compres sors only) 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.)
(4)The Motor Manufacturers name which is located on the motor label or specification plate.
(5)The Motor Mfg. number - also located on the motor label or specifi cation plate.
Retain these numbers for future reference.
Model No..
Code No. _
Mfg. No. __
Motor Mfg. Name.
Motor Mfg. No__
Sears, Roebuck and Co., Chicago, IL 60684 U.S.A.
SI-30-14-4-D 6/89
TABLE OF CONTENTS |
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Page |
WARRANTY. |
. 3 |
SAFETY GUIDELINES |
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WARNING CHART................................................................................................... |
3 |
SPECIFICATION CHART.............. .......................................................................... . |
5 |
GLOSSARY.................................................................................................................. |
5 |
ACCESSORIES FOR USE WITH SEARS AIR COMPRESSORS.............................. |
6 |
GENERAL INFORMATION ................................. ..................................................... |
e |
DESCRIPTION OF OPERATION.............................................................. ............... |
e |
ASSEMBLY INSTRUCTIONS........................ ......................................... .................... .......... |
7 |
Items You Will Need to Assemble Your Compressor............................................................... |
7 |
Installing Handle.......................................................................................................... ............ |
7 |
installing Rubber Foot Strip and Wheels........................................ ......................................... |
3 |
Installing Tank Pressure Gauges.............................................................. .......... ................. |
g |
Installing Regulator.............................................. ..................................................... .............. |
g |
INSTALLATION AND BREAK-IN PROCEDURES...................................................... |
8 |
Location of Air Compressor.......... ...................................................................................... . |
s |
Extension Cords ....................................... ............................................... .............................. |
g |
Lubrication and Oil.................................................................................................................... |
g |
Grounding instructions.... ............................................................................................................ |
9 |
Break-in Procedures..................................................................................................................... |
9 |
OPERATING PROCEDURES .... .................................. .................................... |
9 |
MAINTENANCE......................................................................................................... |
1 0 |
Air Filter - Inspection and Replacement................................................................................... |
to |
Oil - Checking and Changing ......................................................... .......................................... |
to |
Check Valve - Replacement .............................................. ............................................... |
1 0 |
Safety Valve - Inspection.......................................................................................................... |
1 0 |
Motor......................................................................................................................................... |
to |
Belt - Replacement............................... .................................... ................................................ |
1 1 |
Pulley and Flywheel - Alignment................................................................. ............................ |
1 1 |
STORAGE.............................................................................................................. |
11 |
TROUBLESHOOTING GUIDE........................ ............................................... .......... |
1 1 |
AIR COMPRESSOR DIAGRAM.............................................................................................. |
14 |
Parts List........................................................................................................................................ |
t6 |
COMPRESSOR PUMP DIAGRAM................................................................................
Parts List ..................................................................................................................................
1 5
1 7
HOW TO ORDER REPAIR PARTS........................................................................... |
ig |
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/Department throughout the United States 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 from the date of purchase.
This warranty gives you specific legal rights and you may have other rights that vary from state to state.
Sears, Roebuck and Co., Sears Tower, Dept. 698/7131CR-W, Chicago, IL 60684
SAFETY GUIDELINES
This manual contains information that is important for you to know and understandThis 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 special attention to sections headed by these symbols.
ANGER
URGENT SAFETY INFORMATION - A
HAZARD THAT WILL CAUSE SERIOUS INJURY OR LOSS OF LIFE.
WARNING 1
IMPORTANT SAFETY IN.FORMATiOM - A HAZARD THAT MIGHT CAUSE SERIOUS INJURY OR LOSS OF LIFE.
CAUTION |
NOTE |
Information for preventing damage to equipment.
Information that you should pay special atten tion to.
WHAT TO LOOK FOR
Unsuitable
Solvents
Electricity
WARN 1
HAZARDS CAN OCCUR IF EQUIPMENT IS NOT USED PROPERLY.
PLEASE READ THE FOLLOWING CHART.
WHAT COULD HAPPEN |
HOW TO PREVENT IT |
The solvents 1,1,1 - Trichlorethane and Methytone Chloride can chemically react with alumi num 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.
Your air compressor is powered by electricity. Like any other electrically powered device, if it is not used properly it can cause electrica! shock.
If the material you intend to spray contains the sol vents listed at left (read the label or data sheet), do not use accessories that contain aluminum or gal vanized parts. You must either change the material you intend to spray, or use only stainless steel spray equipment.
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.
3
WHAT TO |
WHAT COULD HAPPEN |
HOW TO PREVENT IT |
LOOK FOR |
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Hot Parts |
The compressor head and tubes get hot when |
Never touch the air compressor head or tubes dur |
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the air compressor is running. If you touch them, |
ing or immediately after operation. |
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you can be seriously burned. |
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Flammable |
it is normal for the motor's electrical contacts to |
Operate the compressor in well ventilated areas |
Vapors |
spark when the compressor starts or stops. A |
that are free of gasoline, flammable paint or solvent |
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spark can ignite flammable vapors from |
vapors. |
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gasoline, flammable paints or solvents and |
if spaying a flammable material - provide ample |
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cause a fire or explosion. |
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ventilation. Never spray in a dosed area. There |
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must be a flow of fresh art at all times. |
Compressed Air Compressed air can propel dust, dirt or loose particles it comes in contact with.
Too much air pressure applied to air tools or accessories can cause damage or risk of bursting.
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 and release air pressure from hose before attaching or removing accessories.
Check the manufacturer’s maximum pressure rat ing for air tools and accessories. Regulator outlet pressure must never exceed the maximum pres sure rating.
Moving
Parts
This compressor cycles automatically when the switch is in the “On-Auto" position. If you attempt repair or maintenance while the com pressor is operating, or with the switch in the “On-Auto” position, you can expose yourself to moving parts. These moving parts can cause serious injury or damage, if they come into con tact with you or your clothing.
Always unplug the unit and release air pressure from the tank and any accessories before doing repair or maintenance.
Never operate the compressor with the belt guard removed.
Toxic Vapors |
It is normal for compressed air to contain toxic or |
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irritating vapors. Such vapors are harmful if |
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inhaled. |
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Certain materials you are spraying (like paint, |
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weed killer, sand or insecticide) can be harmful |
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if you inhale them. |
Never directly inhale the compressed air produced by this unit.
Read labels and safety data for ail 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 protec tion against some kinds and limited amounts of toxic material. Read mask and respirator instruc tions carefully. Consult with a safety expert or industrial hygienist if you are not sure about the use of a certain mask or respirator.
Air Tank |
Modifications to the air compressor can cause |
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the air tank to rupture or explode. |
Changing the air tank will cause it to weaken.
The tank can rupture or explode.
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 pressure rating must be used.
For service replacement use only the motors, pul leys and belts designed as standard service replacement parts as indicated in the parts list. Use of improper parts could cause overloading of your unit and electrical supply.
Do not substitute a gas engine for the motor... this compressor was not designed to be powered by a gasoline engine.
Never replace the compressor pump with a differ ent model.
Never increase the compressor pump speed.
Never drill into, weld, or in any way modify the air tank. Do not repair a leaking tank, it must be replaced.
Never replace the air tank with a different mode! or a larger tank.
SPECIFICATION CHART
Model No. |
919.176730 |
919.176830 |
Horsepower |
3 |
3 |
Displacement CFM |
11.3 |
11.3 |
Bore |
2Vs" |
2%" |
Stroke |
2" |
2" |
Voltage-Single Phase |
120/240“ |
120/240“ |
Minimum Branch Circuit Requirement |
15 amp“* |
15 amp*“ |
‘Fuse Type |
Fusetron |
Fusetron |
|
Type “T” |
Type “T” |
Air Tank Capacity - Gallons |
20 |
20 ASME |
Approximate Cut-in Pressure |
80 |
80 |
Approximate Cut-out Pressure |
1 0 0 |
1 0 0 |
SCFM (a) 40 psig |
8.8 |
8 . 8 |
SCFM (a) 90 psig |
7.7 |
77 |
SCFM ((V 100 psig |
7.3 |
7.3 |
U.L. Listed |
Yes |
Yes |
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‘These models have dual voltage motors, 120 and 240 volt. They are WIRED FOR 120 VOLT but can be converted to 240 volt operation. Instructions for connecting the motor for operation at 240 volt can be found printed on the inside of the
motor cover or on the nameplate of the motor.
*A circuit breaker is preferred. Use only a fuse or circuit breaker that is the same rating as the branch circuit the air compressor is operated on. If the air compressor is connected to a circuit protected by fuses, use dual element time delay fuses (Buss Fusetron Type “T” only).
CAUTION
These air compressors 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.)
3.Extension cords comply with specifica tions in owners manual.
When converting this model to 240 volt opera tion, the attached three-prong 120 volt plug must be replaced with a three-prong 240 volt plug (purchase locally) or order line cord Part No. SUDL-404-1.
4. Circuit is equipped with 15 amp circuit breaker or 15 amp Fusetron Type “T” time delay fuse.
If any of the above conditions cannot be met, or if opera tion of the compressor repeatedly causes interruption of the power it may be necessary to operate it from a 2 0 amp circuit. It is not necessary to change the cordset it this change is required.
GLOSSARY
CFM: Cubic feet per minute.
SCFM: Standard cubic feet per minute: a unit of meas ure of air delivery.
PSIG: 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 stan dards of the ASME.
U.L. Listed: Underwriter Laboratories; Samples of compressor outfits, taken from production, were sub mitted to U.L and found to comply with their require ments for design and performance.
Cut-In Pressure: While the motor is off, air tank pres sure drops as you continue to use your accessory. When the tank pressure drops to a certain iow level the motor will re-start automatically. The low pressure at which the motor automatically re-starts is called “cut-in pressure.“
Cut-Out Pressure: When you turn on your cur 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 its capacity. The high pres sure at which the motor shuts off is called “cut-out pressure.”
ACCESSORIES FOR USE WITH SEARS AIR COMPRESSORS
The following accessories are available through the current general sales catalog or at full-line Sears stores.
•SPRAY GUNS |
•PAINT TANKS |
•AIR TOOLS: |
•BLOW GUNS |
•AIR TANKS |
Sanders |
•AIR CAULKING GUNS |
•INFLATOR KITS |
Drills |
•AIR POWERED WASHER GUNS |
•QUICK CONNECTOR SETS |
Impact wrenches |
•SAND BLASTERS |
(various sizes) |
Hammers |
•AIR BRUSHES |
•VISCOSIMETER |
•AIR HOSE: |
•AIR LINE FILTERS |
•AIR PRESSURE REGULATORS |
1/4", 5/16" OR 3/8" ID. |
•TIRE AIR CHUCKS |
•OIL FOG LUBRICATORS |
in various lengths. |
GENERAL INFORMATION
You have purchased an air compressor unit consisting of a 2 cylinder, single stage air compressor pump, an air tank, air hose, wheels, handle, air chuck and associated controls.
Your air compressor can be used for operating paint spray guns, air tools, caulking guns, grease guns, air brushes, sandblasters, power washers, inflating tires and plastic toys, spraying weed killers, insecticides, etc.
An air line filter is usually required for removal of mois ture and oil vapor in compressed air when a paint spray gun is used.
An in-line lubricator is usually required for air tools to prolong tool life.
Separate air transformers which combine the functions of air regulation and/or moisture and dirt removal should be used where applicable.
These accessories can be purchased from most Sears stores or through the Sears General catalog or Power Tool catalog.
DESCRIPTION OF OPERATION
TANK
PRESSURE GAUGE
PRESSURE |
AIR COMPRESSOR |
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SWITCH |
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PUMP |
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ON/OFF
REGULATOR SWITCH
OUTLET PRESSURE
GAUGE
SAFETY.^—-
VALVE ......
CHECK
VALVE
Air Compressor Pump: To compress air, the pistons move up and down in the cylinders. On the downstroke, air is drawn in through the air intake filter and then through the air intake valves. The exhaust valve remains closed. On the upstroke of the piston, air is compressed. The intake valves close and compressed air is forced out through the exhaust valve, through the outlet tube, through the check valve and into the air tank. Working air is not available until the compressor has raised 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.
Pressure Release Valve: The pressure release valve located on the side of the pressure switch, is designed to automatically release compressed air from the com pressor head and the outlet tube when the air compres sor reaches “cut-out" pressure or is shut off. If the air is not released, the motor will try to start, but will be unable to. The pressure release valve allows the motor to re start freely. When the motor stops running, air will be heard escaping from the valve for a few seconds. No air should be heard leaking from the valve when the motor is running.
Safety Valve: If the pressure switch does not shut off the air compressor at or near its cut-out pressure setting, the safety valve will protect against high pressure by “pop ping out” at its factory-set pressure (slightly higher than the pressure switch cut-out setting).
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