Question about Coleman Air Tools & Compressors
I would suggest that you remove the head and check the valve plate, with the passage of time the valves may have become jammed open or not closing fully, preventing the compressor from performing its function. Also check that the relief valve has not corroded, stuck or developed a leak or that the spring has not weakened or collapsed.
The only other problem could lay with the piston ring which may have seized in the pistons. If you do not find any problems with the above items, try spraying some penetrating oil around the edges of the piston and let it soak overnight, move it up and down manually to see if the ring has released, if not, you will have to remove it from the cylinder to check it. Make sure that you remove all excess oil before trying to run the compressor to prevent hydraulicking or dieseling.
Posted on Mar 13, 2011
There are only a few things that can cause this, first the one way intake valve, you must check this, also the pump itself, the troubleshooting steps are to see if it is actually pumping air?, if so, is it entering, through the valve? into the accumulator?, if so is it staying IN the accumulator?
All valves "O" rings and fittings need to be checked for integrity.
Troubleshooting steps and remedies at web sites below, & above.
Posted on Mar 12, 2011
This is likely a failure of the check valve. The valve is USUALLY right where the pipe goes into the tank from the compressor. The usual cause is contamination under the seat OR failure of the seal. As new as this is, I would expect there is contamination or debris in the seat. In any event, disassemble the output check valve. Input check valves are also suspect, however those you would notice a "puffing" at the air cleaner. Another problem is with compression release valves that don;t close, but you would hear air hissing from that. Those are often a part of the pressure switch on small compressors.
Posted on Mar 11, 2011
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Posted on Jan 02, 2017
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