5. Ensure that all windows, covers, and doors are closed and remain in their original positions.
6. Open the top cover.
7. Remove the build unit from the printer, if it is present.
8. Move the recoating unit manually to the front, slowly and carefully.
Clean the recoating roller and recoating plates
1. Locate the recoating unit and use a flat screwdriver to remove four T15 screws.
CAUTION: Be careful not to drop the screws.
168 Chapter 11 Hardware maintenance