For Sceadu SD Main Gear Stopper HI0412116 by Hirobo  [HI0412116]

Sceadu SD main gear retention component

This replacement unit serves as the specified main gear stopper for the Sceadu SD lineup, intended to stabilise the main gear assembly during maintenance and alignment. It provides a reliable locating point to keep the gear engaged while you set mesh or inspect the transmission on Sceadu SD helicopters.

Fitting is direct: remove the main gear cover to expose the gear seat, install the stopper in the correct mount on the Sceadu SD main assembly, and check axial position and clearance before completing reassembly. Use common RC fastening technique when torquing screws and confirm the gear train spins freely after installation.

The stopper is useful when performing tuning work, allowing consistent mesh checks and temporary locking for rotorhead or drivetrain adjustments. It is intended as an aftermarket replacement and should only be used on compatible Sceadu SD airframes that call for the original part.