Benjamin Sheridan Cartridge Valve Repair Instructions 1. Remove stock assembly from action/barrel assembly by removing the receiver stock screw #12. 2. In order fo replace the rubber piston head #19 you must first remove the piston rod assembly #20. To do this, the role pins #23 must be tapped out and the muzzle cap #22 removed. Now, you can line up the pin holding the pump handle in with the roll pin hole and punch that out too #21.
