Hirobo HI0404640 Counter Gear Case for Pipe Drive Tail Housing  [HI0404640]

Pipe Drive Counter Gear Case Overview

This counter gear case is a service replacement part intended for pipe drive tail systems on compatible Hirobo helicopters. It functions as the housing that positions the counter gear relative to the pipe drive assembly and is offered as a common replacement for Eagle, Freya, EX and SX line models.

Fit and role: the case locates the counter gear and helps preserve correct gear mesh alignment during tail drive operation, supporting routine repairs and adjustment of the tail section. Use this part when replacing worn housings or restoring gear positioning after component changes.

Installation notes: follow your model's standard tail housing disassembly, swap or retain internal gearing as required, and secure the replacement case with the original screws. After assembly verify gear mesh, free-play and smooth rotation of the tail drive before performing any flight checks.