S9152 S9153 Input Gear FU1K26101 for Futaba Servos  [FU1K26101]

Input gear for Futaba S9152 and S9153

The Futaba FU1K26101 is supplied as a replacement input-stage gear for Futaba S9152 and S9153 servos used in scale models. It is provided without retail packaging as reflected in the title. This component transmits motion from the motor pinion into the servo gearbox, so its condition directly affects steering accuracy and the overall control response of the model.

Installation notes: remove the servo horn and case screws, then carefully extract the internals while keeping the gear stack order documented. Check the bearings and the mating pinion for any roughness or burrs before installing the new gear. Ensure proper axial alignment and a light, uniform mesh when fitting, then reassemble and confirm free rotation prior to mounting the servo.

Tuning and maintenance role: fitting a fresh first gear can eliminate slop and inconsistent centring, helping to re-establish predictable control. During service, clean any contamination, refresh degraded grease, and confirm full, smooth travel without binding after the replacement.