The external assembly typically consists of the following key parts for installation and basic maintenance: Helm Pump Unit : The main axial piston pump body. Steering Shaft : A standard 3/4" tapered marine-grade aluminum shaft. Shaft Seal : A field-replaceable front seal. Filler Plug : Located at the top of the helm; available in (for single-station) or non-vented (for lower-station in multi-helm setups) versions. Mounting Hardware : Includes a mounting bezel : Newer models (HH5271-3) use ORB (O-Ring Boss)
Always quote the part number directly from the diagram when calling customer support. For example: "I need item 15 from the HH5271 exploded view – the centering spring, part HA5429." Seastar Hh5271 Parts Diagram
The HH5271 helm operates on a series of internal pistons and roller bearings that provide smooth, "No FeedBack" (NFB) steering. While the internal pump block is generally not user-serviceable, several external and replaceable components are frequently shown in official diagrams: The external assembly typically consists of the following
A cover plate secured by three Phillips head screws that holds the shaft seal in position. Filler Plug : Located at the top of
helm consists of several critical external and internal components for installation and maintenance: installation instructions - West Marine