IBM Selectric Maintenance Manual page 24

Pusher Tail
.OOl'tO.~
"-_u
Mtg. Bracket Screws
FIGURE 16. Mounting Bracket Positions
No clearance (the pusher holding the armature away from
rest) can cause mal-selection since the pusher may not
be released when the armature is attracted by. its magnet.
Also extra cycles may result since the armature at rest
would be holding the cycle clutch trip bail partially ro-
tated.
9. Knack Off Eccentri cs (Fig. 17) - Adjust (T2 and R5 arm-
atures manually attracted) to clear the trip bail exten-
sions by .003" to .008".
Excessive clearance will cause extra cycles due to the
armatures not being knocked off. It is necessary to
knock off the armatures since residual magnetism is
present.
No clearance will cause failure to cycle because the
trip bail will not be able to rotate to trip the cycle
clutch.
Knock-Off Eccentric
Trip Bail
©~
- t
.003" - .008"
Extension
FIGURE 17. Knock Off Eccentrics
PRINT SELECTION MAGNET ASSEMBLY (Late Style)
NOTE: The late style magnet assembly may be identified by
the absence of pivot eccentrics
I
and the si ng I
e
knock-off
extension (Fig. 17.1).
1. Guide Plate (Fig. 17.1) - The position of the guide
plate is predetermined by holes which fit over stamped
projections on the pivot plate.
2-5
FIGURE 17.1 Magnet Plate
2. Pivot Plate (Late Style) Fig. 17.2 -Adjust fora clear-
ance of •. 002" to .005" between the yoke and armatures
with the armatures manuall y attracted. Measure clear-
ance of the outside armatures (T2.& R5).
Armature Manually Attracted
Pivot Plate
FIGURE 17.2 Pivot Plate
3. Armature Stop (Late Style)- With the armature manually
attracted
I
adjust armature stop for a clearance of
.003" to .007" between the armature and yoke (Fig. 17.3).
FIGURE 17.3 Armature Stop
4. Knock-Off Eccel'ltric (Late Style) - The redesigned trip
bail contains only one extension. It is adjusted to .003'l
to .008" as shown on Fig. 17.