Shuttle SE Drive Pulley 20T - Hirobo HI0402593  [HI0402593]

Shuttle SE Replacement Drive Pulley

This Hirobo drive pulley is a direct replacement part identified by model HI0402593 and designed for Shuttle SE helicopter drive systems. The 20T marking denotes the tooth count and is used to determine gear ratio and mesh rather than a material or load grade.

In service the pulley transfers torque across mating gears; when replacing the component check gear mesh, bearing condition, and shaft alignment on the Shuttle SE airframe. Work in stages: remove the worn pulley, inspect adjacent gears and bearings for damage, fit the new pulley ensuring correct axial alignment, and confirm free rotation before applying power.

Fit this part during scheduled maintenance or when restoring drivetrain precision after long use. Keeping the pulley and mating gears within correct mesh limits reduces vibration and uneven wear, helping to maintain predictable tuning performance.