This article shares our experiences and tips for servicing a hydraulic autopilot. In our case, the unit is a Simrad HLD2000 MK2LS, also known as a Robertson. The servicing involved replacing the seals in the ram, cleaning the components and replacing the hydraulic oil.

Emerald's rudder is attached to the boat via the rudder shaft which comes up through the stern of the boat. On top of the rudder shaft is a steering quadrant with the steering cables attached to both sides. As the helm turns, it pulls the cables, which in turn pull the quadrant which turns the rudder. We also have an Edison tiller arm connected to the rudder shaft and to which an hydraulic autopilot ram is attached. The ram is operated by the autopilot.

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