Diagram — Seastar Hh5271 Parts

The SeaStar HH5271 (and its modern version, the HH5271-3) is a 1.7 cu. in. front-mount hydraulic helm pump used in outboard and inboard steering systems. It features an axial piston design supported by three roller bearings for smooth operation. Parts & Components Diagram

4.3 Reassembly Sequence

The diagram enforces a specific order:

• You could misalign internal valves.
• You might lose small but critical parts like springs or check balls.
• You risk cross-threading the fragile aluminum housing.

2.4 Valve and Bypass Group

• Check Valves: Small spring-loaded balls that direct flow.
• Relief Valve: Prevents pressure spikes during hard-over turns.

adjustable stainless steel fittings. Older models may use 1/4" NPT threads. West Marine Common Replacement Parts & Kits For repairs and upgrades, the following kits are standard: SeaStar steering parts - Electronics Marine Manuals Seastar Hh5271 Parts Diagram