HP RL2-0079-000CN separation roller is a replacement part for the Tray 1 paper feed assembly. It is identified by the exact part number in the service manual, which provides the removal and replacement procedure for this roller.
The part is used when servicing the printer’s Tray 1 separation roller. The manual describes releasing the roller from its compartment and fitting the replacement by reversing the removal steps. After installation, it recommends printing with Tray 1 selected to check that paper feeds correctly.
This component is intended for the specified Tray 1 roller position; the source does not confirm additional compatible models or package contents.