IBM Selectric - Page 15

upper ball socket and replacing it without the ball joint.
If the ti It ring is removed, its position relative to the
yoke must be checked by a thickness gauge before re-
moval.
NOTE: If the upper ball socket, tilt ring, or tilt ring
spacer are ever replaced by new parts, the shimming
ad justment must be checked.
Minimum Play In
Upper Ba II Socket
Ti It Ring Spacer
5.
Tube Gear
Shim
Enters
Second Notch Of
Tilt Ring
FIGURE 35. Upper Ball Socket Adjustment
CAUTION: Vertical play in the upper ball socket will
affect vertical al ignment and impression because the
type head will not maintain a definite position.
Also, care must be taken to insure that the entire rotate
system is free from binds. A bind in the upper ball socket
can result in poor horizontal alignment ifthe rotate detent
fai Is to fully seat in the detent notch before print occurs.
An excessive bind can cause unwanted roller droppage
in the wear compensator during a negative selection.
Binds in the system (carrier area) can be checked by
manually operating the shift arm in and out.
Ti It Detent - Ad just the guide and pivot screw so that
the tilt detent will operate freely with no side play
{Fig. 36).
Guide Screw
Ti It Detent
FIGURE 36. Tilt Detent Adjustment
13
6.
Excessive side play in the tilt detent will cause poor
vertical al ignment. A bind in the ti It detent wi" affect
both the verti cal and horizontal al ignment because it
will retard or restrict the seatingof the tilt detent which,
in turn, will retard or restrict the seating of the rotate
detent.
Rotate Detent - Ad just the front and rear guides so that
the rotate detent wi II operate freely with no side play
(Fig. 37).
As Little Clearance
As Possible,
7.
As little Clearance
NEW STYLE
~
As little Clearance As
Possible, No Binds
OLD STYLE
No Binds
Adjust Guides To Obtain
Proper Clearance
FIGURE 37. Rotate Detent Guides
Excessive play in the detent wi" result in poor hori-
zonta alignment because the detent cannot positively
position the type head.
Rocker Shaft - Adjust the rocker shaft left or right to
obtain.002" to .004" side play in the rocker (Fig. 38).
o
o
.002/1 to .004/1 - ........ 0- ..... -
'
FIGURE 38. Rocket Shaft Adjustment