Inboard Rear Mount Helm Pump - 2.4 Cu. In. | Uflex USA UP39R Uflex USA Inboard Rear Mount Helm Pump - 2.4 Cu. In. | UP39R Rear mount Uflex hydraulic steering helm with 2.4 cubic inch displacement for use in single or multi-outboard applications. Rear Mount Helm Pump Compact design Ball bearing piston race Built in lock valve for positive rudder lock Integral relief valve for over pressure protection Stainless steel shaft Easily accessible lock valve and shaft seal for replacement <1/4 in. NPT fitting for 3/8 in. tube Complete with elbow fittings and tilt mechanism Displacement revolution 39 cc 2.4 cu. inch 70 bar-1000 PSI Max wheel diameter 28 in. Replaces Uflex UP39R-U