IBM 5280 Maintenance Information Manual page 101

Page of SY31·0602·0
As updated December 5, 1980
By TN L SN20·9590
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. Close the diskette locking lever
II.
4. Loosen the bail lever screw
1m.,
5. Push the bail
1m
inward slightly and disconnect the
bail actuator cable eyelet
II
from the bail lever
1m.
6. Open the diskette locking lever.
7. (51TD) Place a piece of clean paper between the
heads, or insert a scratch diskette.
8. Loosen the bail mounting screw
II.
9. Pull the pivot rod
II
out, then remove the bail and
the bail return spring
II
by slidifJg 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 nutlilfrom the collet
actuator rod
1m .
CAUTI,ON
(3150) Do not let the head hit the pressure pad, or the
head could be damaged. (51 TO) 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
iii.
8 Collet
335
13. Turn the collet actuator rod
1m
up and out of the
way.
14. Remove the collet/flat spring assembly
II.
Replacement
1. Reinstall the collet/flat spring assembly
II .
2. Reinstall the collet actuator roll
II
and the
pressure roliB.
3. Turn the collet acutator rod
1m
down against the
flat spring.
4. Reinstall the diskette locking lever
II
in the open
position.
5. Reinstall the screw and the nut
III.
Leave the
screw loose.
6. Push the diskette locking lever toward the collet
actuator rod until there is a maximum gap Dof
0.1 millimeter (0.004 in.) between the diskette
locking lever and the diskette gUidefJ. Tighten
the screw and nut
III .
7.
Reinstall the bail
1m
on the collet actuator rod
1m .
Ensure that the bail return spring
m
is in the correct
position. Place the baillD] under the head load arm
D.
I nstall the pivot rod
II
and tighten screw
II.
8. 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
lEI . .
11. Open the diskette locking lever
IJ .
12. (51TD) Remove the paper from between the heads,
or remove the scratch diskette.
13. Insert 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).