Compressor powers air tools fine, but hook up a blow gun and it's weak!

by Jim
(Holden, MA USA)

I'm using two different Craftsman compressors and am having the same problem with both. They used to blow air good; now it's just a weak stream of air out of the blow gun (I tried 2). They still run my tools (Cassese V-nailer & brad nailer) fine. Could it have something to do with a build up of water in the tanks? It blows up my tires quickly, though. I'm clueless.


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Bill says...

Hi Jim. If the air tools run OK, and their performance hasn't changed, then the air flow to them hasn't changed either.

The blow gun being weak, is this new, or always? Blow guns both need a high flow of air to work up to expectations, and some of them are metered to reduce the flow of air form the nozzle to help prevent injury.

Try a different type of blow gun?

Cheers,

Bill

Comments for Compressor powers air tools fine, but hook up a blow gun and it's weak!

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Jun 20, 2016
Blow gun not blowing air
by: Anonymous

Hi, don't know how old your post is but, I'm having same problem, I bought a new blow gun thinking the other NEW one was defective. So I read the label says don't use over 90 psi, so I lowered it and it worked. I'm not happy with only 90-100 psi, my old one didn't matter what it was set at and it worked fine. I see they have these new safety holes at the nozzle now so if you put your finger over the front it blows out the side holes to prevent injury, but I don't plan on being that stupid, so now I have to look for a blow gun which can blow more air if there is one.

Apr 18, 2016
blower does not keep blowing strong
by: Anonymous

I had problems with blower attachment not blowing continuous pressure and changed the quick disconnect at the compressor end and it resolved the problem. Now good steady air flow.

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wont build over 20psi

by Mark
(Michigan)

I have a craftsman 12 gal compressor that will not build over 20 psi, the motor keeps running and it runs and sounds fine but the tank will not build over 20psi. It was working fine and nothing has moved or been changed with the pressure valves. any ideas?

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Bill says....

Mark, sure, I've got ideas. Why not wander over to the TROUBLESHOOTING page, and click the link to the pages that talk about why air compressors won't build pressure.

It's generally only one or two things that cause this, and there are some checks noted there that you can do to see if you can isolate your compressors problem.

Cheers,

Bill

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919.167241 will not build up pressure when running

by ROBERT WILLIAMS, JR.
(BATON ROUGE, LA USA)

I have a Craftsman Compressor MODEL: 919167241 which will not build up pressure when running. I can hear a leak somewhere but can't tell really where it comes from

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Bill says...

Robert, please look at your compressor pressure switch. Beside it may be the unloader valve. Can you feel if air is blowing out of the unloader valve?

If it is, then you need to stop the compressor, drain all the air from the tank, open the fitting where the tube from the pump head enters the tank, and either clean or replace the check valve.

Post your response here please so I can follow the thread.

Cheers,

Bill

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