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I have a Central Pneumatic, 21 Gallon, 3HP air compressor. The compressor is exiting air through exthaust port.

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If air leaks when motor is off, fault most likely in-tank check valve. Follow discharge air line from pump to tank. Brass/steel valve at tank is the check valve. Remove hose to valve and check for leak. Replace as needed. If air is leaking while motor is running fault could be reed valves in head. Faulty reed valves in head, or torn head gaskets will cause very hot discharge air and tank will most likely never fill to shut off (or take a very long time to fill)

Posted on Sep 07, 2010

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Posted on Jan 02, 2017

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