Rear Mount Helm Pump 1.7 Cubic in. | UFLEX UP28R Uflex USA Rear Mount Helm Pump 1.7 Cubic in. | UP28R Rear mount Uflex hydraulic steering helm with 1.7 cubic inch displacement. Rear Helm Pump Rear mount Compact design Ball bearing piston race Built in lock valve for positive rudder lock Integral relief valve for over pressure protection 3/4 in. tapered stainless steel shaft Easily accessible lock valve and shaft seal for replacement Cast iron rotor for greater durability and longer life 1/4 in. NPT fitting for 3/8 in. tube Complete with elbow fittings Drop in replacement for Seastar helms Displacement revolution 28 cc 1.7 cu. inch Relief setting 70 bar-1000 PSI