This sealing ring sits in the chaff spreader assembly of the parent forage harvester. It creates a seal between two stationary or rotating components to prevent material leakage and maintain system pressure. A degraded seal allows chaff and fines to bypass the intended path, leading to uneven spreading and potential contamination of bearings or drive components in the spreader housing. As an original component, its cross-section and durometer match the groove geometry of the spreader housing, ensuring the seal remains seated under vibration and varying material loads.