Bail Removal; Bail Replacement; Solenoid And Idler Removal; Solenoid And Idler Replacement - IBM 3274 51C Maintenance Information

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E.3.3.5 Bail Removal
See Figure E·30.
1.
Power down.
I
DANGER
Voltage is still present at the socket when the
power cable is disconnected.
2.
Disconnect the ac drive motor power cable, " .
3.
Turn the operator knob to the closed position.
4.
Loosen the lever screw,
e.
5.
Push the bail, . ' inward slightly, and disconnect
the bail cable eyelet,
CD '
from the lever,
CD .
6.
Turn the operator knob to the open position.
7.
Loosen the bail mounting screw,
G.
Warning: Permitting the pressure pad to hit the head can
damage the head.
8.
Observe the position of the bail return spring,
0 .
Now remove the pivot rod,
m,
the bail return
spring,
0 '
and the bail,
G
by lifting the bailout
from under the head load arm,
G .
E.3.3.6 Bail Replacement
See Figure E·30.
1.
Reinstall the bail return spring,
0 '
the bail,
e '
and the pivot rod,
G).
Place the bail,
e '
on the
collet actuator rod,
O.
Ensure that the bail return
spring,
0 '
is in the correct position. Place the
bail,
a,
under the head load arm,
e,
place the
bail pivot rod,
CD '
in the groove, and tighten the
screw,
C).
2.
Turn the operator knob to the closed position.
3.
Push the bail,
8,
inward slightly, and connect the
cable eyelet,e . , to the bail lever with the crimp,
0,
facing outward. (Ensure that the cable remains
on the pulley and is not twisted; turn the solenoid
plunger,
e,
if necessary.)
4.
Turn the operator knob to the open position.
5.
Perform the Head Gap Adjustment (paragraph
E.3.3.3).
E·38
E.3.3.7 Solenoid and I dler Removal
See Figure E·31.
1.
Power down.
I
DANGER
Voltage is still present at the socket when the
power cable is disconnected.
2.
Disconnect the ac drive motor power cable,
e .
3.
Turn the operator knob,
4) ,
to the closed position.
4.
Loosen the lever screw,
G .
5.
Push the bail,
0,
inward slightlY, and disconnect
the cable eyelet,
e '
from the bail lever,
0 .
6.
Turn the operator knob,
Q '
to the open position.
7.
Remove the ac motor drive belt,
G .
8.
Remove the solenoid cable connector,
G,
from the
control card.
9.
Remove the solenoid, the bracket, and the cable as a
unit,G) .
10.
Loosen the solenoid locking setscrew,
e '
and
unscrew the solenoid from the bracket. (The solenoid
and the bail actuator cable are exchanged as a unit.)
E.3.3.8 Solenoid and Idler Replacement
See Figure E·31.
1.
2.
3.
4.
5.
6.
7.
8.
Reinstall the solenoid,
CD,
on the bracket.
Reinstall the solenoid, bracket, and cable as a unit.
Reconnect the head load solenoid cable connector,
0,
to the control card.
Reinstall the ac motor drive belt,
0 .
Turn the operator knob,
G,
to the closed position.
Push the bail,
0,
inward slightly, and connect the
cable eyelet,
G '
to the bail lever,
e,
with the
eyelet crimp,
0,
facing outward. (Ensure that the
cable remains on the pulley and is not twisted; turn
the solenoid plunger,
0 '
if necessary.)
Turn the operator knob,
0,
to the open position.
Perform the Head Gap Adjustment (see paragraph
E.3.3.3).

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