UFlex Front Mount Helm Pump - UP28 This front mount helm pump from UFlex has a built-in lock valve for positive rudder lock, and an integral relief valve for over pressure protection. It has an easily accessible lock valve and shaft seal for replacement. This helm features ball bearing piston race and cast iron rotor for greater durability and a longer life. It requires a X64 square flange or X57 round flange for installation of the pump wih intermediate dashboard position. It comes with 90 adju