Craftsman 2hp 20 gal motor stops at 60 PSI

by Brian Stalzer
(Ames IA)

Older late 70's craftsman compressor

Older late 70's craftsman compressor

I have an older late 70's craftsman compressor that I am having troubles with.


The compressor starts up and runs pretty good until my gauge reads around 60psi...motor stops.

I release air completely and it does not kick back on, nor can i get it to come back on.

I unplug it and mess around a while plug it back in and hit the motor reset and it comes on and does the same thing again.

I took the pipe directly off of the cyl head and let it run...it goes and goes just fine....when i hook it back up...it does it all over again.

I did buy a replacement pressure switch thinking that was the problem...wired it up...does same thing.

Any help would be greatly appreciated.

Thank you
Brian

Please email @ bkstalz@gmail.com
__________________
Brian, when the compressor stops, is the power still flowing from the pressure switch to the motor circuit, or, when the compressor stops, it is because the pressure switch has shut it off?

Bill

Comments for Craftsman 2hp 20 gal motor stops at 60 PSI

Click here to add your own comments

Jan 04, 2013
compressor
by: Brian

I just ran the compressor. . It shut off at 60psi. . . Left it plugged in for ten minutes. . Hit the reset on electric motor and it kicked back on again up to 80 . . Shut off. When i try to hit reset it doesn't do anything
_______________
OK, that suggests that your pressure switch is not tripping off, but the thermal overload on the motor is.

In order of importance, if you are using an extension cord, don't. Make sure that the breaker or fuse supplying the compressor is big enough. Makes sure nothing else is pulling power from the circuit at the same time as the compressor is trying to start. Make sure the intake filter is clean. Then, test your start capacitor.

B.

Jan 04, 2013
switch
by: Brian

Bill,
I am pretty sure the pressure switch is shutting it off
_____________
You need to be sure... you need to use a multi-meter on the wires running from the pressure switch to the motor.

If the pressure switch has tripped to off, and there is power coming to the pressure switch, then it's a pretty good bet that the pressure switch itself is the problem.

B.

Click here to add your own comments

Add your own question or comment. It's easy to do. How? Simply click here to return to Craftsman Compressor Issues.

craftsman air compressor will not start

by Shawn Jenkins
(south carolina)

I have a 5.5 hp 30 gal craftsman air comp. It will turn over then kick the breaker. It is empty. I have had it for years and use it everyday. I cannot figure out what is wrong with it. Help. I need it. Shawn
_________________
Shawn, assuming there are no changes in the power supply to the compressor, or the operating location of your air compressor, if the the intake filter is clean, if there is sufficient oil in it if it's a lubed air compressor, if the pump itself is OK, then it might be a start capacitor that's failing or failed, or the motor itself has shorted out.

You have a look at the sitemap page under troubleshooting for more tips.

Cheers,

Bill




Click here to post comments

Add your own question or comment. It's easy to do. How? Simply click here to return to Craftsman Compressor Issues.

craftsman 125psi portable oiless portable compressor

Hi I have a craftsman 125psi portable and when transporting it it tipped in the car and mineral oil looking stuff came out. I turned it on it worked for about 10 seconds and now wont work. It says its oil less and where did the mineral oil come from?

______________________
Bill says....

While Craftsman didn't clue me in on their design for clear "mineral oil", oil-less generally means that there is no sump, and no lubricating oil needed. I doubt if it means lubrication free.

What leaked out may be the permanent lubrication which my be why your Craftsman air compressor won't run.

As to the not running, assuming you have emptied the tank of all air first, what happens when you plug it in?

I don't know where you are located so I don't know if this helps. Sears Canada says "At Sears, we service what we sell. Our service organization covers Canada coast to coast, just call 1-800-469-4663 or fill out our on-line Parts Inquiry form . If ordering parts, make sure that you have the name, make and model number of the merchandise and the name and number of the part you wish to order." Might be a good idea to contact them, then?

It would be useful if you could give me your answer(s) as a comment here, so that I can follow our discussion as we try to figure out what is happening (or not happening) with your air compressor.

Cheers,

Bill

Click here to post comments

Add your own question or comment. It's easy to do. How? Simply click here to return to Craftsman Compressor Issues.

Crafstman type and weight of oil

125 psi, 1.5 hp, 2 gl single tank.
What type and weight of oil to refill it

_______________________
Bill says...

The specific recommendation is always to use the oil that your air compressor manual recommends.

In the absence of that information, click the OIL link from the navigation bar, and read the pages which provide details.

Cheers,

Bill

Click here to post comments

Add your own question or comment. It's easy to do. How? Simply click here to return to Craftsman Compressor Issues.