IM ASSUMING YOU HAVE A HAND HELD PUMP AND HE OPENED THE RELEASE VALVE. TRY FILLING THE CYLINDER COMPLETELY AND SEE IF IT WORKS. IF THAT DOESNT FIX IT TRY TAKING THE END OFF THE HOSE AND PUMPING THE AIR OUT, THEN REASSEMBLE.IT MAY HAVE AN AIR TRAP IN IT.
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IM ASSUMING YOU HAVE A HAND HELD PUMP AND HE OPENED THE RELEASE VALVE. TRY FILLING THE CYLINDER COMPLETELY AND SEE IF IT WORKS. IF THAT DOESNT FIX IT TRY TAKING THE END OFF THE HOSE AND PUMPING THE AIR OUT, THEN REASSEMBLE.IT MAY HAVE AN AIR TRAP IN IT.