I just recieved a Beeman 1357 with a FOUR UNCLES hand pump. I can't get any air into the gun. Do i have to setup the gun special? Or is there something i need to do with the pump. The 1357 still has a little pressure in it but i can't move the pressure up at all.... pumped lots of time... It's cold here in Kansas... is that a factor?
N/A charging problems
- Thread starter CEOwen56
- Start date
Make sure you've cocked the gun before you try to pump. That takes the hammer spring pressure off the valve seat. It may also need to be charged a bit higher before your hand pump will start filling. Sometimes if there's not enough or no pressure to seal the valve, a hand pump doesn't have enough pressure/volume at the start to get the gun to start taking air without it leaking out as fast as you pump.
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Best to isolate problem. Pressure test pump with dead-head plug (pictured), inserted in female quick-disconnect at end of fill whip (hose.) (Four Uncles should have included dead-head plug.) Pressurize pump to assure proper operation and no leaks. Release pressure, after test, with bleed valve. If pump OK, problem lies with gun. WM 
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Feel free to come back with additional questions on gun or pump if matter remains unsolved. WM
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thanks so much for all the information!! This is the path i took to figure it out. I tried to stop the air in the pump. I didn't have a dead head. None of my efforts work... thursday my buddy came over and i show him my issues. It was the warmest day in a while... so i hooked it up and started pumping and on the third pump... it started working and i put 1500psi in the gun. But later in the day... cold again, there was nothing i could do to make it build pressure... so I took the whole thing in the house... warm. Today.. friday morning it would not pressurize again. Then with one hand i heald the quick disconnest tight into the gun... it started working. So, i seems to be just a bad connection. what do y'all say?
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