Umarex Ready Air wont fill past 2600 PSI

Yes i have tightened all hoses and bleeder valve. The tank will hold the air at 2600 PSI when i disconnect it. Also i can put the brass plug into hose end and it still will not go past 2600 PSI. Hoping it is not an o ring inside the compressor with less than 20 minutes total on compressor. Was just hoping someone might have had this same problem with their compressor and could tell me what was happening. 
 
Biohazardman is spot on for an external fitting or hose leak. I found the exact issue using my Benjamin Traveler compressor. Being dilligent on the complete fill cycle helped me identify the leak source and a simple o-ring replacement sealed the deal .....pun intended. Since you tested your Ready Air with the plug attached, I think you have your answer, the internal o-ring leak or a faulty pressure switch unfortunately.





Dan