Pipe Drive Counter Gear Case Compatible with Hirobo HI0404640  [HI0404640]

Counter Gear Case — Pipe Drive Fitment

This counter gear case serves as an RC replacement component designed specifically for pipe drive tail systems. It forms the housing that sets the counter gear in relation to the pipe drive unit and is commonly used across relevant Hirobo helicopter models.

Fit and role: by locating the counter gear the case helps maintain gear mesh and alignment during tail drive use, which assists in standard repair and tuning tasks for the tail section. It is suitable when replacing damaged housings or correcting gear engagement after part swaps.

Installation notes: dismantle the affected tail housing according to your aircraft's service procedure, transfer or replace internal gears if needed, and secure the new case with the original fasteners. Recheck gear mesh and free-play with both main and tail drives prior to final assembly and test flights.