CRAFTSMAN 921.164710 Air Compressor Owner’s Manual
- June 17, 2024
- Craftsman
Table of Contents
CRAFTSMAN 921.164710 Air Compressor
CAUTION
Before using this product, read this manual and follow all its Safety Rules
and Operating Instructions.
WARRANTY
CRAFTSMAN ONE YEAR FULL WARRANTY
FOR ONE YEAR from the date of purchase, this product is warranted against any
defects in material or workmanship. Defective product will receive free repair
or free replacement if repair is unavailable For warranty coverage details to
obtain repair or replacement, visit the website:
www.craftsman.com This warranty does not cover the
air filter or drive belt, which are expendable parts that can wear out from
normal use within the warranty period.
This warranty is void if this product is ever used while providing commercial
services or if rented to another person.
This warranty gives you specific legal rights, and you may also have other
rights which vary from state to state.
Safety Instructions
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.
DANGER
Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
WARNING
Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION
When used without the safety alert symbol indicates a potentially hazardous situation that, if not avoided, may result in property damage,
Important Safety Instructions and Guidelines
Save all instructions
CALIFORNIA PROPOSITION 65 WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects and/or reproductive harm.
WARNING
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.
_ _CAUTION__
| The air compressor should be operated on a dedicated 15-amp circuit. If the circuit does not have 15 free amps available, a larger circuit must be used. Always use more air hose before utilizing extension cords. All extension cords used must be 12 gauge with a maximum length of 25 ft. The circuit fuse type must be a time delay. Low voltage could cause damage to
the motor.
---|---
Risk of Moving Parts
| If the air compressor is in operation, all guards and covers should be
attached or installed correctly. If any guard or cover has been damaged, do
not operate the equipment until the proper personnel has correctly re-paired
the equipment. The power cord should be free of any moving parts, twisting
and/or crimping while in use and while in storage.
Risk of Burns
| There are surfaces on your air compressor that while in operation and
thereafter can cause serious burns if touched. The equipment should be allowed
time to cool before any maintenance is attempted. Items such as the compressor
pump and the outlet tube are normally hot during and after operation.
Risk of Falling
| Operation of the air compressor should always be in a stable position.
Never use the air compressor on a rooftop or elevated position that could
allow the unit to fall or be tipped over. Use additional air hose for elevated
jobs.
The risk from Flying Objects
| Always wear ANSI Z87.1-approved safety glasses with side shields when the air compressor is in use. Turn off the air compressor and drain the air tank before performing any type of maintenance or disassembly of the hoses or fittings. Never point any nozzle or sprayer toward any part of the body or at other people or animals.
Important Safety Instructions & Guidelines
Specifications
- Pump …………………………………………………………………. Oil-Free. Direct Drive
- Motor ………………………………………………………………. 1.5 HP
- Bore …………………………………………………………………… 2.48″
- Stroke …………………………………………………………………. 0.87″
- Voltage Single Phase ……………………………………………….. 120 VAC
- Minimum Circuit Requirement ………………………………… 15 Amps
- Air Tank Capacity ………………………………………………………. 26 Gallons
- Cut-in Pressure …………………………………………………………………….. 120 PSI
- Cut-out Pressure ………………………………………………………………….. 150 PSI
- SCFM @ 90 PSI ……………………………………………………………………….. 3.8
- SCFM @ 40 PSI ……………………………………………………………………… 5.1
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: The 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, CUL, 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 for
more than 30 minutes or one hour. Doing so could damage the air compressor.
Parts & Features
- See the figures below for reference
Installation & Assembly
WARNING
The air compressor should be turned off, unplugged from the power source, and 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 information,
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 daily to make sure it is clean
and in working order.
Grounding Instructions
This product must 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. (See the figure below.) The plug must
be plugged into an outlet that is properly installed and grounded under 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
Risk Of Fire Or Explosion
This product incorporates snap action switch contacts and a universal electric
motor which tend to produce arcs and sparking and therefore should not be
exposed to flammable liquids or vapors. This product is not intended for
installation or use in a commercial garage or shop environment.
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 that the product is connected to an outlet having the same configuration as the plug. No adapter should 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
- Set the Auto/Off switch to the Off position.
- inspect the air compressor, air hose, and any accessories/tools being used for damage or destruction, if any of these mentioned items require repair/replacement, contact your local authorized dealer before use.
- Close the drain valve.
- Connect the air hose to the quick-connect socket on the regulator assembly by inserting a 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 quickconnect socket.
- Plug the power cord into the proper receptacle.
- Turn the Auto/Off switch to the Auto position and the compressor will start and build air pressure in the tank to cut out pressure and then shut off automatically.
- 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.
- The air compressor is now ready for use.
Daily Shut-Down Procedures
- Set the Auto/Off switch to the Off position.
- Unplug the power cord from the receptacle.
- Set the outlet pressure to zero on the regulator.
- Remove any air tools or accessories.
- 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 3resent 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.
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.
Check the safety valve by performing these three steps:
- Plug the compressor in and run until shut-off pressure is reached.
- Wearing safety glasses, pull out the safety valve ring to release pressure from the tank.
- The safety valve should close automatically at approximately 40-50 PSI. If the safety valve does not allow air to be released when you pull out on the ring or does not close automatically, it must be replaced.
WARNING
- Do not attempt to remove or adjust the safety valve.
From time to time, the air filter needs to be removed and cleaned,
- Turn the air compressor off,
- Unplug the air compressor,
- Turn the air filter cover counterclockwise to remove it.
- Remove the air filter from the air filter housing.
- Blow compressed air through the air filter for 10-15 seconds.
Storage
For storing the air compressor, be sure to do the following.
- Turn the unit off and unplug the power cord from the receptacle.
- Remove all air hoses, accessories, and air tools from the air compressor.
- Perform the daily maintenance schedule.
- Open the drain valve to bleed all air from the tank.
- Close the drain valve.
- Store the air compressor in a clean and dry location.
| Maintenance Schedule|
---|---|---
Items to Check/Change| Before each use or daily
Check the Tank Safety Valve| X
Overall Unit Visual Check| X
Drain Tank| X
Check the Power Cord for Damage| X
NOTE: The motor will automatically restart without warning if the unit is left plugged into an outlet with the Auto/Off switch in the on position.
CAUTION
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 daily.
CAUTION
This compressor is equipped with an automatic reset thermal overload protector which will shut off the motor if it becomes overheated. If the thermal overload protector is actuated, the motor must be allowed to cool down before start-up is possible. For more details, see the Troubleshooting Guide.
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.
| PROBLEM | POSSIBLE CORRECTION |
|---|---|
| Air leaks at the check valve or the pressure relief valve. | A defective check |
valve results in a constant air leak at the pressure relief valve when there
is pressure in the tank and the compressor is shut off. Drain the tank, then
remove and clean or replace the check valve.
Air leaks between the head and cylinder.| Be sure of proper torque on head
bolts. If the leak remains, contact a service technician.
Air leak from the safety valve.| Operate the safety valve manually by pulling
on the ring. If the valve continues to leak when in the closed position, it
should be replaced.
The pressure reading on the regulated pressure gauge drops when an accessory
is used.| If there is an excessive amount of pressure drop when the accessory
is used, replace the regulator.
NOTE:
Adjust the regulated pressure under flow conditions (while the accessory is being used). It is normal for the gauge to show minimal pressure loss during the initial use of the tool.
Excessive tank pressure.| Move the Auto/Off lever to the Off position. If the
unit doesn’t shut off, unplug it from the power source and contact a service
technician.
A motor will not start.| Make sure the power cord is plugged in and the switch
is on. Inspect for the proper size fuse in your circuit box. If the fuse was
tripped, reset it and restart the unit. If repeated tripping occurs, replace
the check valve or
contact a service technician.
Make sure the Thermal Overload Switch has not tripped. The motor has a built- in thermal cut-out that trips when necessary to protect the motor from damage when overheated.
To reset the motor overload toggle turn the pressure switch Auto/Off lever to the Off position and unplug the unit from the power outlet. Allow 10 minutes (minimum) for motor overload cut-out to cool and reset. Unit can
then be plugged in and re-started.
Thermal overload| 1. Lack of ventilation, room temperature too high. Move to
a cooler
protector cuts| environment.
out repeatedly.| 2. Excessive air usage, compressor too small for this
application. Lower
| rate of consumption.
Excessive moisture in the discharge air.| Remove the water in the tank by
draining after each use. High-humidity environments will cause excessive
condensation. Utilize water filters on your airline.
| NOTE:
Water condensation is not caused by compressor malfunction. Be sure the compressor’s air output is greater than your tool’s air consumption
rate.
Air leaks from the tank body or tank welds.| Never drill into, weld or otherwise modify the air tank or it will weaken.
The tank can rupture or explode. A compressor cannot be repaired. Dis- continued the use of the air compressor.
Craftsman Air Compressor Model 921.164710 Exploded View
PARTS
Craftsman Air Compressor Model 921.164710 Exploded View
Craftsman Air Compressor Model 921.164710 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.
The kit number and parts that are included are as follows:
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