Electro-hydraulic Steering Systems up to 500 kgm Steering Systems & Controls, Uncategorized Selection of the System Hydraulic Piping Electrical Harness 1 Hydraulic Power Packs 2,3 540 Degree Electric Wheel 4,5 Cylinder / Linear Sensor 7 Joystick (optional) 8 Programming Box 9,10 Tiller Arms 6 – Autopilot Course Computer (not supplied)