Ron: You have an air leak somewhere. I use a pump-spray bottle with a soap and water solution while the compressor is running. Spray the soap solution on each end of the copper tube leading from the compressor motor to the air tank and look for bubbles. Correct any bad connections (tighten and/or replace any packings) Spray each hose coupler with the solution and look for bubbles.
Black Cat BC2500 manual needed. Looking for a manual for this model air compressor, pdf would be great! Asked by A on 1 Answer. Air Compressor Sales and service including replacement pumps and repair parts for portable and stationary oil free and oil lubricated air compressors.
If there are no leaks, you may have to remove the cylinder head and check the valves in the valve body between the cylinder head and the cylinder. You will need to buy replacement gaskets if you remove the head from the cylinder. May 23, 2014.