921.166400 1HP, 2 SCFM compressor used for spray painting?
Sears model # 921.166400. It is 2 SCFM, 1HP. Is there a paint sprayer that can be used with it? I'm thinking LVLP. Any suggestions?
Don, with this air compressor you do not have high volume. You get some volume, but not what I would determine as high.
Turn the issue around.
Find the spray painting equipment that is right for the job you want to paint, and read the specs of the paint gun. That will tell you the flow and pressure needed for that equipment.
Then, remembering that you will get about 3-4 CFM of compressed air at 90 PSI for each HP of air compressor motor size, you can do a pretty good estimate of what size of air compressor you need for the painting job.
Craftsman model 919.165190 compressor blows breaker within a few seconds of operation
by Stuart Redman
(Saint Paul, MN)
The affected tool is a Craftsman model 919.165190 25 gal. light duty, oiless compressor.
For more details, please see the pictures.
Unloaded, with the pressure line to the tank disconnected, the motor turns at 1/2 speed for a few seconds and then the breaker blows.
It is plugged into a 20A branch with 12 gauge wire that is no more than 20' from the panel. Here is what I have done for troubleshooting:
1. Tried a different circuit.
2. By-passed the pressure switch and ran current directly to the motor.
3. Tested the run and start capacitor. Had to remove a diode from the start capacitor for proper test. Both capacitors tested good.
4. Traced all visible wiring runs for a possible fault.
None of these improved the situation. Is it safe to conclude the motor is toast or is there another possibility?
Thanks for your help,
Excellent post, particularly with the information and photos Stuart. Thanks for that.
In your shoes I'd select the motor as the likely culprit. Is it the motor toast? Possibly.
Some compressor motors have centrifugal start assist on the motor shaft inside the housing, and if yours is one and the start assist has seized, then that might account for the excessive current draw and the breaker blowing.
Certainly, I would take the motor to a rebuild shop and ask for a start and run test before tossing it, as they are getting very expensive.
I hope others with this same compressor can chime in here as well.