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1.5 hp kobalt air compressor runs but doesnt build but 60lbs pressure, the unit has been used very little, about two years old?

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It's either the gasket for the head to the valve or the valve assembly replacement needed. I went through mine as it wouldn't build past 75lbs tank pressure & replaced the pressure switch and tank check valve and then went and replaced the pump with a 2 stage pump instead while fixing the other one and when I disassembled it I found one gasket above the valves and head where it was broken as they have a wire in it so if it gets to hot it will deteriorate it. Hope this helps.

Posted on Oct 22, 2011

  • Bax Moor Oct 22, 2011

    I also have a 5 horse motor on mine..

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Make sure your fittings are not leaking by putting a soap solution around them and looking for bubbles. If there is a belt from the motor to the compressor make sure that is tight.

Posted on Mar 20, 2011

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