Seastar Hh5271 Parts Diagram -

While not technically internal to the helm, the diagram often includes the plastic reservoir (non-pressurized) that mounts on top of the helm. It includes a breather cap and a dipstick. Cracks in the reservoir are common in older HH5271 units.

You can obtain the official diagram from several sources: Seastar Hh5271 Parts Diagram

Positionable O-ring style hose fittings (on "-3" models) that connect the helm to the hydraulic lines. Essential Service Kits While not technically internal to the helm, the

Do not use standard automotive petroleum grease inside the helm. Use only Seastar hydraulic fluid or a compatible light oil (ISO 15-22). Petroleum grease will swell the seals. Seastar Hh5271 Parts Diagram

A semi-circular metal piece that fits into a slot on the shaft to lock the steering wheel in place.