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Derek Spudich

Why does my Craftsman Air Compressor stop building pressure at 30psi?

by Derek Spudich Last activity date:
November 12th, 2010

I own a Craftsman Upright 12 gal. tank, 1 HP Air Compressor (oil lubricated). Model number 921166400. I have had this for about 3 years now with no problems. I use it very sporadically, and it can go months at a time without any use at all. Yesterday, while the compressor was running, the sound of the compressor changed slightly, and it sounded like it started to run a little faster. After several minutes, I noticed that it was not shutting off and the tank would not build pressure past 30psi. I also noticed a slight burning smell, but unsure if that was related to the problem or just from the heat of the motor running longer than normal.


I have drained the tank completely and started the compressor again. It takes a 5-6 minutes (which is a long time to start with) to build to 30psi. It will keep running but will not build past that mark.


When the compressor is off, it will hold 30psi and no leaking is noticed anywhere.


So, whats wrong with my compressor??? Gaskets? check valve?


Thanks for your responses.

Tags:
Air Compressors , Craftsman , Tools
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Answers (4)
afritz afritz
It can be frustrating when something so frustrating like a air compressor stops building pressure. It defeats the whole purpose of even having one. While researching your question here on Manage My Life I noticed a previous similar question with a posted response from an expert. I have attached the link below for you to view while you wait on your expert response. I hope the link that I have provided you is useful.
Answered in 27 minutes
by afritz afritz
November 12th, 2010
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