This is an RC-scale replacement pulley designed for Hirobo Shuttle SE tail assemblies, listed as HI0402595. The component serves as a direct service item for the tail-drive path where the pulley engages the tail transmission, and it is identified by its 35T tooth count.
Use this pulley when performing routine maintenance or when replacing worn tail components to restore expected engagement and alignment in the tail drive. It supports maintenance and tuning workflows commonly performed on electric RC helicopters.
Installation notes: access the tail case and remove the existing pulley following your model's disassembly steps, fit the HI0402595 pulley onto the tail shaft, verify tooth engagement and alignment, then reassemble the tail case and confirm smooth tail rotation before flight. Inspect associated bearings and linkage during replacement to ensure system reliability.
Role in tuning: swapping the pulley can affect belt/gear engagement profiles and tail responsiveness; check tail pitch and servo centring after installation and make incremental adjustments during ground testing.
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