HP 8300 - Manual (Page 63)

Replace the feed-roller assembly
You can find the feed-roller assembly under the ADF lid.
HP recommends that you replace the feed-roller assembly every 100,000 scans. Use
the HP Button Settings Utility to keep track of the ADF scan count. For more information,
see
General info tab .
If the ADF frequently jams or misfeeds paper, then replace the feed-roller assembly. To
obtain an ADF Roller Replacement kit, visit
www.hp.com .
Contact HP Support
For support contact information, see the printed Setup and Support Guide that came with
the scanner.
User Guide 61