IBM 3270 Maintenance Manual page 566

5. Install the two mounting screws. Move the
diskette drive in or out for a clearance of 1.0
mm (0.040 inch.) between the rear of the front
panel and the face plate; tighten the screws.
(Side View)
6. Install the option adapters you removed
(5-20-5).
7. Install the cover of the system unit (5-100-3).
8. Connect all cables.
October 1984 5-602-5