Collet/Flat Spring Replacement - IBM 3274 51C Maintenance Information

3. Loosen the lever screw,
4) .
4. Push the bail,
0 '
inward slightly, and disconnect
the bail actuator cable eyelet,. ' from the
lever,
8. .
5.
Turn the operator knob,
0 '
to the open position.
6.
Loosen the bail mounting screw,
G .
7. Observe the position of the bail return spring,
CD ;
then remove the bail pivot rod,
G '
the bail return
spring,
CD '
and the bail,
0 '
by sliding the
bail,O ' out from under the head load arm,
e.
Warning: Damage to the head,
e '
can occur if the pres-
sure pad,
0 '
is permitted to hit the head.
8. Remove the screw and nut,
0 '
from the collet
actuator rod,
e .
9. Remove the operator knob,
G .
10. Remove the collet actuator roll,
0 '
and the pres-
sure roll,
Cit .
11. Turn the collet actuator rod,
e '
up and out of the
way. Then remove the collet/flat spring
assembly,
G .
aCollet
0
e
W
Actuator Rod Screw
G
End Play
0.1 mm maximum
(0.004 inch)
E.3.1.2 Collet/Flat Spring Replacement
See Figure E-21 (2 parts).
Warning: Too much pressure or binding of the flat
spring,
G '
will damage the spring.
1. Reinstall the collet/flat spring assembly,
G .
2. Reinstall the collet pressure roll,
CD '
and actuator
roll,
«D .
3. Turn the collet actuator rod,
e '
down against the
spring.
4. Reinstall the operator knob,
0 '
in the open
position.
5. Reinstall the screw and nut,
0 '
that attach the
operator knob to the collet actuator rod,
e .
Push
the operator knob and the collet actuator rod,
e '
together until there is a maximum of O.l-mm (0.004-
inch) end play, " ' between the operator knob,
G '
and the diskette guide,
e .
(See Part 2 of Fig-
ure E-21.) Tighten the screw.
6. Reinstall the bail return spring,
G '
the bail,
0 ,
and the bail pivot rod,Q . Place the bail,
0,
on
the collet actuator rod, " . Ensure that the spring,
G '
is in the correct position. Place the bail,
0 '
under the head load arm. Place the bail pivot rod,
0,
in the groove, and tighten the bail mounting
screw,
G .
Operator Knob
0
/
Figure E-21 (Part 2 of 2). Collet/Flat Spring Removal
CD
Plunger
Eyelet Crimp
Facing Out
Appendix E. IBM 3180 Diskette Drive Maintenance E-23