Shuttle FZ-S Center Hub Replacement - HI0402589 Hirobo  [HI0402589]

Shuttle FZ-S center hub assembly

This center hub is the OEM-designated replacement part listed as HI0402589 for the Shuttle FZ-S lineup, intended as a direct-fit center position component for model helicopter rotor systems.

In practice the part serves as the central connection point in the rotor assembly, helping locate the main rotor relative to the airframe and supporting routine balance checks and small trim adjustments during setup and maintenance.

Installation notes: remove power and secure the airframe before access, compare the removed hub with the replacement to confirm alignment features, and re-check rotor tracking and freeplay after reassembly. Use the same fasteners and torque patterns as the original part to avoid introducing imbalance.