For example, if the printer is in a dusty environment, if paper is used that produces higher then normal levels of paper dust, or if low-quality aftermarket components are used, the estimated pages may drop significantly. While this is a good recommendation, the time to install a new maintenance kit will vary depending on printing conditions. Resetting the printer’s maintenance counterįor HP LaserJet 4000 and LaserJet 4050 series printers, Hewlett Packard recommends the installation of a maintenance kit after every 200,000 pages printed.Replacing the separation rollers in paper cassettes.Replacing the feed rollers in paper cassette bays.Replacing the tray 1 (multi-purpose tray) pick-up roller.
