This Hirobo collar is an RC-scale component for the tail pitch lever used in Eagle Freya helicopter linkages. It functions as a locating and retention device that supports accurate alignment of the tail control linkage while you perform maintenance or repairs.
To install on compatible linkages, slide the collar onto the lever shaft at the required pitch location, secure it with the lever's existing set screw or retaining system, then confirm unobstructed movement through the full pitch range. Address any lateral play at the lever mount before attempting flight tests.
For tuning work the part serves as a fixed reference and end stop for repeatable pitch settings, beneficial when refining tail response or fitting new linkage items. Check mating surfaces on each service and replace the collar if fit deteriorates to keep tail control reliable.
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