Powerline 880 pumping?

Question

can you pump a powerline 880 multiple times or not? Mine lets the air out when the arm is fully extended.

Answer 1

You can pump a Daisy 880 up to ten times

http://www.pyramydair.com/p/daisy-880-mu...

If you pump more than 10 times you can damage your rifle, and it will not increase power.  

Answer 2

Daisy's manual says the 880 delivers its most power at 10 pumps. That's the number of times I pump mine when I shoot. If your gun leaks air, then you might have a bad seal or something else that needs repair.