So I have a Psychoballistics superbolt pump I am in the process of trading and haven't aired it up in some time. Earlier today as I was about to package and ship I decided to air it up.
Anyway the gun began to leak air really quickly. As soon as I pulled the pump arm and cocked it the leak stopped. As soon as I shot it it began to leak again. I'm not exactly experienced with cockers but I supposed the valve is staying open when it shouldn't. Help me out guys, I really need to resolve this.
You don't have a regulator on the gun?
You may be able to fix this problem, at least the leaking, without one.
Unscrew the cocking rod from the rear of the gun and push the backblock back. Under the backblock you should see a silver disc. This is the velocity adjuster. Use an allen wrench to back that disc out a few turns, re-install the cocking rod, air up the gun again, and see if the leak stops.