Collet; Collet/Flat Spring Removal And Replacement; Removal - IBM 5280 Maintenance Information Manual

Collet
335
COLLET/FLAT SPRING REMOVAL AND
REPLACEMENT
Removal
1.
Power off.
2. If the diskette drive was removed from an IBM 5282
or an IBM 5286, remove the mounting bracket on the
base of the drive by removing two screws on each side
of the mounting bracket. (This bracket is not
installed for the other data stations.)
3.
4.
5.
6.
7.
8.
9.
Close the diskette locking lever
II.
Loosen the bail lever screw
1m.
Push the bail
1m
inward slightly and disconnect the
bail actuator cable eyelet
Ii
from the bail lever
1m .
Open the diskette locking lever.
(51TD) Place a piece of clean paper between the
heads, or insert a scratch diskette.
Loosen the bail mounting screw
II.
Pull the pivot rod
II
out, then remove the bail and
the bail return spring mby sliding them out from
under the head load arm
'D.
(Note the location of
the bail return spring between the bail and the
diskette guide for replacement.)
10. Remove the screw and the nut
1m.
CAUTION
(31SD) Do not let the head hit the pressure pad, or the
head could be damaged. (51TD) Do not let the heads hit
each other, or the heads could be damaged.
11. Remove the diskette locking lever
II.
12. Remove the collet actuator roll
II
and the pressure
roll
II.
8 Collet
335
13. Turn the collet actuator rod
1m
up and out of the
way.
14. Remove the colletlflat spring assembly
D .
Replacement
1. Reinstall the collet/flat spring assembly
a .
2.
3.
4.
5.
6.
7.
8.
Reinstall the collet actuator roll
II
and the
pressure roll
II .
Turn the collet acutator rod
1m
down against the
flat spring.
Reinstall the diskette locking lever
II
in the open
position.
Reinstall the screw and the nut
iBJ.
Leave the
screw loose.
Push the diskette locking lever toward the collet
actuator rod until there is a maximum gap
fJ
of
0.1 millimeter (0.004 inch) between the diskette
locking lever and the diskette guide
fJ.
Tighten
the screw
iBJ.
Reinstall the bail
II!]
on the collet actuator rod
1m.
Ensure that the bail return spring m is in the correct
position. Place the bail
ml
under the head load arm
D.
Install the pivot rod Dand tighten screw
g.
Close the diskette locking lever
IJ .
9. Push the bail inward slightly and reconnect the bail
actuator cable eyelet lito the bail lever
1m.
Ensure that the crimp on the eyelet faces out.
10. If the bail actuator cable is twisted, turn the solenoid
plunger
iD.
11. Open the diskette locking lever
IJ .
12. (51TD) Remove the paper from between the heads,
or remove the scratch diskette.
13. I nsert and remove a diskette. The diskette should
move into and out of the diskette drive smoothly
without hitting the collet. If it does not, install a
new flat spring.
14. Perform the head gap adjustment (see 345).