HSL 186 383Waalhaven Waalhaven

Nice! What does that yellow wheel on the crane do?

@Maersk.146 Thank you! To be honest, I don't really know. Possibly it functions in some kind of pulley?

@ddz7504 Thanks, yep, I have no idea either. Anyone else know what it is?

Its cable winder, used while crane is moving.
Also this video at 2:00

@ter Thanks, Mikhail!