This metal gear set is an aftermarket replacement for Futaba S3003 servos, supplying durable internal gears to replace worn plastic parts. The kit restores mechanical engagement inside the servo so hobbyists can fix backlash or stripped teeth without discarding the entire servo.
Installation notes: follow the documented S3003 case opening steps, lift out the existing gear stack and place the new gears in the identical sequence and orientation. Confirm gear mesh and endplay before sealing the case to avoid increased friction or binding during operation.
Tuning note: installing fresh metal gears improves positional repeatability and reduces slack that can affect control precision. After installation, center the output horn and bench test the servo across its full travel range prior to mounting it back in the model.
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