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My air compressor won't compress more than 40 lbs what can I do?

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This is either a problem with the check valve (common problem) or with the compression release. The compression release is often a centrifugal device on large 5Hp types or part of the pressure switch on small pancake types. The valve should close while unit is running. For the check valve, broken springs or worn out valve seats are common. The check valve is usually where the pipe goes into the tank.

You don't say what model of compressor you have so can't give anymore details than this..

Posted on May 31, 2010

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Your compressor is worn or dirty or both. Disassemble the head and inspect it. Look for dirt in the reed valves ... look for excess sloppyness in the piston (worn rings)

You may be able to repair this, expect to pay $50.00 for a kit (you dont ID the unit so I cannot make a recommendation) ... It may be cheaper to replace the unit rather than have it repaired professionally.

Posted on May 31, 2010

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