Futaba FU1K10001 First Gear for S9602 Servo, replacement servo gear  [FU1K10001]

Replacement first gear for S9602

This replacement first gear is supplied as a service part for the Futaba S9602 servo, intended for hobby-grade RC servos. It serves as the primary gear in the servo's gear train and is used when the original gear is worn, damaged, or during routine gearbox servicing.

Installation is straightforward for users comfortable disassembling a small RC servo: remove the case, note the existing gear stack order, replace the first gear, and reassemble while ensuring correct mesh and alignment. Keep gear teeth clean and check surrounding bearings and splines for wear before final assembly to avoid premature failure.

In tuning and maintenance terms this part restores the mechanical interface between the servo output shaft and the rest of the gear train. Replacing a worn first gear helps maintain repeatable centring and reduces backlash introduced by damaged teeth, supporting consistent servo behaviour in scale RC models.