Work boats hydraulic steering systems.Cylinder complete with flexible hose with 1/2" female threaded connections to be connected to 18x15 mm copper pipes. It must be chosen on the basis of the rudder maximum torque moment.Helm pump with 1/2" female threaded connections and 1"/25 mm Stainless Steel shaft. It must be chosen on the basis of lock-to-lock steering wheel turns. The values indicated in the table are the wheel turns for each combined cylinder, in order of size starting from the smallest.