Futaba FUAS4126 Servo gear set compatible with S9155 S9351 servos  [FUAS4126]

Servo gear replacement for S9155/S9351

This FUAS4126 gear set is an RC-scale replacement part listed for use with Futaba S9155 and S9351 servos, provided to restore or change internal gear trains without modifying the servo housing.

The set focuses on direct gear swap tasks: remove the servo cover, document gear stack orientation, replace the affected gears, and reassemble while checking mesh and endplay. The description here reports compatibility with the S9155 and S9351 designations as given in the original part name.

In tuning and routine service, replacing worn or stripped gears returns the original mechanical interface and helps maintain predictable steering and throttle responses in model applications; use correct servo grease sparingly and confirm smooth rotation before reinstalling the servo in the model.

This gear set is a maintenance part for replacing internal gears in compatible Futaba servos, useful for routine repairs and restoring mechanical reliability in RC models.