A slow air compressor

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Forum topic by bluchz posted 11-04-2010 11:18 PM 7683 views 0 times favorited 5 replies Add to Favorites Watch
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187 posts in 3579 days

11-04-2010 11:18 PM

Topic tags/keywords: question

I have a craftsman 30 gallon air compressor that has been acting up lately. It has been running slow and tripping the circuit breaker.I was going to look at it this weekend and try to figure out if it was the contacts or something worse. I am assuming that it has contacts similar to a well pump switch. The compressor is 10years old so i probably got my moneys worth but it would be nice for my wallet if it was a simple fix. Anyone have any suggestions on how to trouble shoot this compressor?

-- flash=250,100][/flash]

5 replies so far

View SCOTSMAN's profile


5849 posts in 3790 days

#1 posted 11-04-2010 11:21 PM

Sounds as though it’s labouring a bit is it well enough oiled it might be warming up or getting tight.Alistair

-- excuse my typing as I have a form of parkinsons disease

View Sawdust4Blood's profile


408 posts in 3227 days

#2 posted 11-04-2010 11:29 PM

oiled or or oil-less? Either way from your description, I’d be looking at the pump. If it’s an oiled pump there might be an easy fix. If it’s one of the oil-free teflon lined jobbies, you might just be at the end of it’s service life. The ten year age though is probably less important than the number of hours on the pump. How much service has it seen in the last 10 years?

-- Greg, Severn MD

View Mark Shymanski's profile

Mark Shymanski

5623 posts in 3918 days

#3 posted 11-05-2010 12:26 AM

Maybe an obvious thing, but have you drained the tank lately? IF it gets full of condensation it won’t have any reserve and won’t compress a bit…sometimes the obvious things get overlooked.

-- "Checking for square? What madness is this! The cabinet is square because I will it to be so!" Jeremy Greiner LJ Topic#20953 2011 Feb 2

View bluchz's profile


187 posts in 3579 days

#4 posted 11-06-2010 12:05 AM

Ahhh all great places to start. it is an oil-less compressor. I leave it plugged in all the time(probably not wise)i would say moderate to little service, I will check on the tank drain also. Thanks everyone!

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View huff's profile


2828 posts in 3490 days

#5 posted 11-06-2010 01:19 AM

Does it have a filter? My large compressor for the shop has a filter (actually looks like a small muffler on a lawn mower). My compressor was taking forever to build pressure and I was afraid the seals in the compressor was bad and started looking for parts to rebuld it. On the parts break down I saw the filter and a comment about cleaning it regularly… I took the filter off and was shocked how bad the filter was. I blew it out with the air hose and it was amazing how much better the compressor works. It’s like brand new again. I have not replaced the filter yet, but I do make sure I blow it out about once a month now. Again, don’t know if your compressor has a filter, but I would check and also Mark brought up a good point, check the drain. Good luck and hope it’s something simple.

-- John @

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