Service Aid; Special Tools - IBM 6580 Product Support Manual

SERVICE AID
The diskette drive requires no scheduled maintenance.
Warning: The drive hub and pulley assembly are
plant-adjusted and cannot be replaced in the field.
The head carriage assembly can be replaced in the
field; however, any attempt to repair or clean the
head cartiage assembly may cause damage to the
read/write head. Voltage or resistance checks of
the read/write head made with the CE meter may
damage the head and should not be attempted.
SPECIAL TOOLS
The three special tools needed to service the diskette drive
are stored on the frame of each drive. Their use is described
in the Adjustments section.
1. The timing pin is used to mechanically align the
stepper motor shaft and pulley.
NOTE: The Timing Pin may be stored on the diskette
drive frame or under the head cable guide. (Ref. Figure).
2. The track 40 feeler gauge clip is used to keep the gauge
in contact with the track 40 adjustment surface.
3. The head carriage assembly spring is used to keep the
head carriage against the feeler gauge during this
adjustment. This spring angle must match the view as
shown in detail A (below) with an acceptable deviation
of ± 1.5 mm (0.060 inch).
DISKETTE UNIT - Service Aid, Special Tools
-31-