The Hirobo HI0404537 SX joint shaft cover is an RC replacement component designed for Eagle, Freya, EX and SX helicopter platforms. It covers and shields the joint where the shaft meets drivetrain linkages, helping to maintain alignment in normal operation.
This entry emphasises compatibility and service notes rather than detailed technical data. The part is intended as a direct replacement to be fitted during maintenance or minor repairs to restore proper clearance between linkages and housings.
Installation notes: fit the cover over the joint and secure it to reduce debris entry and limit play at the connection. Inspect mating faces for signs of wear before installation and ensure surrounding linkages are reassembled to their original positions to keep rotorhead response consistent. This cover is sold as an individual replacement part and is presented as an RC accessory only.
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