Tuning Help, Fx dreamline won't fire

Are you saying your Hammer didn't fire the valve or it did fire the valve and no air came out
In other words did the trigger send the hammer forward?

Are you saying your Hammer didn't fire the valve or it did fire the valve and no air came out
In other words did the trigger send the hammer forward?
It fires the valve but no air came out
 
What caliber? I have one in .177 and with the reg set as high as yours appears to be, I'd say valve lock. Back off the reg pressure or shim the spring/add weight to the hammer.
Valve rod has been broken. An unskilled gunsmith put a powerful custom hammer spring for more power, thats why valve rod is broken.
 
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