This Futaba FUAS3198 gear set corresponds to the S9102 servo family and is listed with part references AS3198 and EBS3092. It is supplied without retail packing, intended as a replacement internal gear set for hobby servos rather than a complete servo unit.
The set serves a straightforward maintenance role: restore worn internal gears, replace stripped teeth after incidents, or prepare a servo for continued use after teardown. Because this is a component-level part, verify your servo model designation matches before disassembly.
Installation notes: open the servo casing following the manufacturer's service practice, retain small hardware and bearings in order, and check gear mesh and endplay after assembly. Use light, appropriate grease for gears and test the servo through its full travel before reinstalling in the model. If unsure, consult a trained hobby technician or the Futaba service documentation for the S9102 line.
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