http://www.fastprinters.com/lexmark_fuser_maintenance_kit.asp<br />Instructions on how to install the Image Transfer Unit, (ITU) kit.<br />83 ITU Maintenance is displayed at each 120,000 copies when<br />the ITU Assembly needs to be replaced to maintain the print quality<br /> and reliability of the printer. There are two assemblies, ITU assembly<br /> and Second Transfer Roll, in a maintenance kit.<br />Both should be replaced at the same time.<br />Maintenance warning<br />in the Lexmark C770 and C780 series printers. Order all your Lexmark<br />printers, parts and supplies online at:<br />fastprinters.com<br />This covers parts 40x0343, 40x1826, 40x1788, 40x0343, 40x1738
