Editing IBM 5120 Maintenance Guide (section)

== 8-Inch Floppy Drive Maintenance ==

The 5120 has 2 × 8-inch floppy drives built in (typically Shugart-class drives in IBM cosmetics). Maintenance items:

* '''Drive belt''' — urethane perishes. Modern replacements available from the 8-inch floppy restoration community.
* '''Head load solenoid''' — exercise; replace if fatigued.
* '''Spindle motor brushes''' — wear is common. Brushes can be re-sourced from industrial motor suppliers.
* '''Read / write head''' — clean with IPA on a foam swab. Never use cotton — fibres in the head gap cause errors.
* '''Head alignment''' — verify against a known-good diskette using the procedure in the MIM.
* '''Oxide shedding''' from old IBM Diskette 2D media — inspect every diskette; do not load shedding diskettes.