Craftsman Air Compressor Owner's Manual

Model No. 921.166380

CAUTION: Before using this product, read this manual and follow all its Safety Rules and Operating Instructions.

Table of Contents Overview

• Safety Instructions
• Installation & Operation
• Maintenance & Storage
• Troubleshooting Guide
• Parts List
• Español, p. 10

Warranty

ONE YEAR FULL WARRANTY ON CRAFTSMAN AIR COMPRESSOR

If this Craftsman Air Compressor fails due to manufacturer's defects in material or workmanship within one year of the date of purchase, RETURN IT TO THE NEAREST SEARS STORE OR SERVICE CENTER IN THE UNITED STATES and it will be replaced or repaired (at our option), free of charge.

If this Air Compressor is used for commercial or rental purposes, this warranty applies for only 90 days from the date of purchase. This warranty gives you specific legal rights and you may also have other rights which vary from state to state.

Sears, Roebuck and Co., Dept. 817WA, Hoffman Estates, IL 60179 U.S.A.

Safety Symbols

The information listed below should be read and understood by the operator. This information is given to protect the user while operating and storing the air compressor. We utilize the symbols below to allow the reader to recognize important information about their safety.

Important Safety Instructions & Guidelines

• Save all instructions

WARNING: This product contains one or more chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.

Improper operation or maintenance of this product could result in serious injury and/or property damage. Read and understand all of the warnings and safety instructions provided before using this equipment.

Specifications

Glossary

• CFM: Cubic feet per minute.
• SCFM: Standard cubic feet per minute; a unit of measure for air delivery.
• PSIG: Pounds per square inch gauge; a unit of measure for pressure.
• ASME: American Society of Mechanical Engineers.
• California Code: Unit may comply with California Code 462 (I) (2)/ (M) (2).
• Cut-In Pressure: The air compressor will automatically start to refill the tank when the pressure drops below the prescribed minimum.
• Cut-Out Pressure: The point at which the motor stops when the tank has reached maximum air pressure.
• Code Certification: Products that bear one or more of the following marks: UL, ULc, ETL, CSA, have been evaluated by OSHA-certified independent safety laboratories and meet the applicable Underwriters Laboratories Standards for Safety.

Duty Cycle

This is a 50% duty cycle air compressor. Do not run the air compressor more than 30 minutes of one hour. Doing so could damage the air compressor.

Parts & Features

See figures below for reference.

[Diagram Description: A detailed illustration shows the air compressor with various components labeled. Key parts include:]

• Regulator Gauge: Indicates the outgoing air pressure to the tool and is controlled by the regulator.
• Check Valve: When the pump is not in operation, the valve closes to retain air pressure inside the tank. An internal component.
• Tank Pressure Gauge: Indicates the reserve air pressure in the tank.
• Outlet Tube: Connects the compressor to the tool.
• Tank Safety Valve: Used to allow excess tank pressure to escape into the atmosphere. This valve should only open when the tank pressure is above the maximum rated pressure.
• Pressure Switch: Controls the power to the motor and also the cut-in/cut-out pressure settings. This switch serves as the Auto-On/Off positions for the unit.
• Pressure Relief Valve: Located on the side of the pressure switch, designed to automatically release compressed air when the air compressor reaches cut-out pressure. The released air should only escape momentarily and the valve should then close.
• Pressure Relief Tube: Channel for air released by the pressure relief valve.
• Regulator: Controls the air pressure coming from the air tank. Turn the knob clockwise to increase pressure and counterclockwise to decrease pressure.
• Tank Drain Valve: Used to drain condensation from the air tank. Located at the bottom of the tank.
• Air Intake Filter: Provides clean air to the pump and must always be kept free of debris. Check on a daily basis or before each use.
• Quick Connect: Offers a quick release feature for attaching and removing the air hose.
• Oil Fill Cap: For adding oil to the compressor.
• Oil Sight Gauge: Allows visual inspection of the oil level.

Installation & Assembly

WARNING: The air compressor should be turned off, unplugged from the power source, the air bled from the tank and the unit allowed time to cool before any maintenance is performed. Personal injuries could occur from moving parts, electrical sources, compressed air or hot surfaces. The quick connect assembly must be attached before use. Failure to assemble correctly could result in leaks and possible injury. If unsure of assembly instructions or you experience difficulty in the assembly please call your local service department for further instruction.

Assembly

1. Remove air compressor, handle assembly, hardware, oil bottle, intake filter, manual and accessories from the styrofoam packaging.
2. Remove the plastic plug from the compressor intake port. [Illustration showing plug removal]
3. Install the filter in the compressor intake port. [Illustration showing filter installation]
4. Remove the oil fill cap from the crankcase and fill until the oil reaches the top of the red dot in the sight glass. Oil capacity is 3 oz. Use SAE-30 non-detergent (API CG/CD heavy duty motor oil). Under extreme cold weather conditions, 32° F (0°C) or below, use SAE-10 weight oil.
5. Replace the oil cap.
6. Attach the handle to the frame with the saddle bolts from the outside of the handle and the knobs on the inside. [Illustrations showing handle attachment steps]

Estimated Assembly Time: Approximately 5 minutes

Getting Started - Location of the Air Compressor

The air compressor should always be located in a clean, dry and well ventilated environment. The unit should have at minimum, 12 inches of space on each side. The air filter intake should be free of any debris or obstructions. Check the air filter on a daily basis to make sure it is clean and in working order.

Grounding Instructions

This product should be grounded. In the event of an electrical short circuit, grounding reduces the risk of electric shock by providing an escape wire for the electric current. This product is equipped with a cord having a grounding wire with an appropriate grounding plug. [Illustration showing grounding plug and outlet]. The plug must be plugged into an outlet that is properly installed and grounded in accordance with all local codes and ordinances. Check with a qualified electrician or service personnel if these instructions are not completely understood or if in doubt as to whether the tool is properly grounded.

WARNING: Improper installation of the grounding plug will result in a risk of electric shock. If repair or replacement of the cord or plug is necessary, do not connect the grounding wire to either flat blade terminal. The wire with insulation having an outer surface that is green with or without yellow stripes is the grounding wire. Check with a qualified electrician or serviceman if the grounding instructions are not completely understood, or if in doubt as to whether the product is properly grounded. Do not modify the plug provided. If it will not fit the outlet, have the proper outlet installed by a qualified electrician.

This product is for use on a circuit having a nominal rating of 120 volts and is factory-equipped with a specific electric cord and plug to permit connection to a proper electric circuit. Make sure the product is connected to an outlet having the same configuration as the plug. An adapter should not be used with this product. If the product must be reconnected for use on a different type of electric circuit, qualified service personnel should make the reconnection.

Extension Cords

Use only 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. Make sure your extension cord is in good condition. When using an extension cord, be sure to use one heavy enough to carry the current your product will draw. Cords must not exceed 25 feet and No. 12 AWG size must be used. An undersized cord will cause a drop in line voltage resulting in loss of power and overheating.

Break In Procedures

No break in procedure is required by the user. This product is factory tested to ensure proper operation and performance.

Operating Procedures

Daily Start-Up Procedures

1. Set the Auto-On/Off lever to the Off position.
2. Inspect the air compressor, air hose, and any accessories/tools being used for damage or obstruction. If any of these mentioned items are in need of repair/replacement, contact your local authorized service dealer before use.
3. Close the drain valve.
4. Check the oil level of the pump.
5. Connect the air hose to the quick connect socket on the regulator assembly by inserting the quick connect plug on the air hose into the quick connect socket. The quick connect socket collar will snap forward and lock the plug into place providing an air tight seal between the socket and plug. To release the air hose push the collar back on the quick connect socket.
6. Plug the power cord into the proper receptacle.
7. Turn the Auto-On/Off lever to the On-Auto position and the compressor will start and build air pressure in the tank to cut-out pressure and then shut off automatically.
8. Adjust the regulator to a PSI setting that is needed for your application and be sure it is within the safety standards required to perform the task. If using a pneumatic tool, the manufacturer should have recommendations in the manual for that particular tool on operating PSI settings.
9. The air compressor is now ready for use. The following inflation and cleaning accessories packaged with this unit should only be operated at maximum pressure of 90PSI: blow gun, rubber-tapered nozzle, inflation needles, adapter, and blow gun adapter.

[Diagram Description: An illustration shows the air compressor with numbered callouts corresponding to the operating procedure steps.]

Daily Shut-Down Procedures

1. Set the Auto-On/Off lever to the Off position.
2. Unplug the power cord from the receptacle.
3. Set the outlet pressure to zero on the regulator.
4. Remove any air tools or accessories. When draining the tank, always use ear and eye protection. Drain the tank in a suitable location; condensation will be present in most cases of draining.
5. Open the drain valve allowing air to bleed from the tank. After all of the air has bled from the tank, close the drain valve to prevent debris buildup in the valve.

CAUTION: When draining the tank, always use ear and eye protection. Drain the tank in a suitable location; condensation will be present in most cases of draining.

WARNING: Water that remains in the tank during storage will corrode and weaken the air tank which could cause the tank to rupture. To avoid serious injury, be sure to drain the tank after each use or daily.

Detaching Unit from Dolly

For removing, read steps below first before attempting to remove or replace the air compressor to the dolly:

WARNING: Do not use the dolly for any other means other than transporting this air compressor. Do not move air compressor/dolly combo without tightening the knob that safely secures the compressor to the dolly.

Removing the air compressor from the dolly:

1. The air compressor should be turned off and unplugged from the power source.
2. Turn the knob on the bottom of the dolly counter-clockwise until the knob releases from the air compressor. (This should be 1-2 revolutions)
3. While holding the dolly cart handle with one hand, lift up on the air compressor handle to remove the compressor.

[Illustrations showing steps 1, 2, and 3 for removing the compressor from the dolly.]

Reattaching the air compressor to the dolly:

1. The air compressor should be turned off and unplugged from the power source.
2. Align the compressor's rubber isolators with the depressions in the dolly frame.
3. Insert knob bolt into the air compressor and rotate clock-wise until tight. (If the compressor is not properly aligned onto the frame the knob will not tighten. Reposition compressor and try again.)

[Illustrations showing steps 1, 2, and 3 for reattaching the compressor to the dolly.]

Maintenance

NOTE: Any service procedure not covered in the maintenance schedule should be performed by qualified service personnel.

WARNING: The air compressor should be turned off, unplugged from the power source, air bled from the tank and allowed time to cool before any maintenance is performed.

PRECAUTION: To ensure efficient operation and longer life of the air compressor unit, a routine maintenance schedule should be followed. The following schedule is geared toward a consumer whose compressor is used in a normal working environment on a daily basis.

Storage

For storing the air compressor, be sure to do the following:

1. Turn the unit off and unplug the power cord from the receptacle.
2. Remove all air hoses, accessories, and air tools from the air compressor.
3. Perform the daily maintenance schedule.
4. Open the drain valve to bleed all air from the tank.
5. Close the drain valve.
6. Store the air compressor in a clean and dry location.

Troubleshooting Guide

WARNING: The air compressor should be turned off and unplugged from the power source before any maintenance is performed as well as the air bled from the tank and the unit allowed time to cool. Personal injuries could occur from moving parts, electrical sources, compressed air, or hot surfaces.

Parts List

[Diagram Description: An exploded view diagram shows all the individual parts of the air compressor, with numbers corresponding to the parts list.]

Note: Any part/kit number field without a number is not available. Descriptions are provided for reference only. The Kit # column represents that the part being offered is available in a kit. One of each part per kit will be offered.

Kit Contents:

Warranty & Service

Warranty:

ONE YEAR FULL WARRANTY ON CRAFTSMAN AIR COMPRESSOR

If this Craftsman Air Compressor fails due to manufacturer's defects in material or workmanship within one year of the date of purchase, RETURN IT TO THE NEAREST SEARS STORE OR SERVICE CENTER IN THE UNITED STATES and it will be replaced or repaired (at our option), free of charge.

If this Air Compressor is used for commercial or rental purposes, this warranty applies for only 90 days from the date of purchase. This warranty gives you specific legal rights and you may also have other rights which vary from state to state.

Sears, Roebuck and Co., Dept. 817WA, Hoffman Estates, IL 60179

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Note: A Spanish version of this manual is available starting on page 10.