XRB SR Replacement Transmission Gear HI0301110 Compatible with XRB SR Helicopters by Hirobo  [HI0301110]

Direct replacement for XRB SR transmissions

This Hirobo XRB SR Super Gear B is an aftermarket drivetrain spare created for the XRB SR helicopter family. It functions as a like-for-like replacement intended to restore the gearbox during routine maintenance.

Role: positioned in the drive train, the gear conveys torque from input pinions to spur assemblies and plays a part in overall mesh quality and collective response; ensure correct axial and radial alignment when refitting to keep drivetrain runs smooth.

Installation notes: remove the bodywork to reach the main gearbox, confirm bearing seating and take up any slack before torquing fasteners; avoid overtightening which can warp gear faces, and carry out a slow-run check after assembly to spot any abnormal noise.

Tuning relevance: exchanging the HI0301110 can reduce gear lash and vibration-related trim issues; inspect adjoining pinions and supports for wear to secure predictable handling following the swap.