MAINTENANCE 8.118Consumables and Replacement PartsFrom time to time, you need to replace the toner cartridge,roller, and fuser unit to maintain top performance and to avoidprint quality problems and paper feed problems resulting fromworn parts.The following items should be replaced after you have printed aspecified number of pages:To purchase the consumables and replacement parts, contactyour Samsung dealer or the retailer where you bought yourmachine. We strongly recommend that items be installed by atrained service professional, except for the toner cartridge (seepage 8.8) and the ADF rubber pad (see page 8.12).Items Yield (Average)ADF rubber pad Approx. 20,000 pagesADF roller Approx. 60,000 pagesPaper feeding roller Approx. 60,000 pagesTransfer roller Approx. 60,000 pagesFuser unit Approx. 60,000 pages