XRB SR Super Gear B HI0301110 Direct Replacement for XRB SR Helicopter Geartrain by Hirobo  [HI0301110]

Overview of the XRB SR replacement gear

This Hirobo XRB SR Super Gear B is an aftermarket drivetrain spare intended for the XRB SR helicopter family. It is supplied to replace worn components and maintain gearbox function during routine servicing.

Role: fitted within the transmission, the gear transfers torque from the motor pinion to downstream spur gears and contributes to mesh precision and collective performance; proper alignment is essential to avoid premature wear.

Installation notes: remove the canopy and access the main gearbox, ensure bearings are seated correctly and there is no endplay before final assembly, and use correct torque values to prevent gear distortion; perform a low-speed spin check to verify quiet engagement.

Tuning relevance: changing to HI0301110 can restore smoothness and reduce vibration that affects flight trim; check adjacent components so the upgrade yields consistent handling improvements.