IBM Selectric Maintenance Manual page 79

7.
Pawl Clearance (Fig. 165) - The upright lug of the tab
latch should be formed forward or back so that the tip
of the escapement pawl clears the escapement rack
teeth by .005" - .010" when the tab lever is latched
to the rear.
Small Screwdriver
Escapement Bracket
FIGURE 165. Pawl Clearance Adjustment
8. Carrier Return Tab Interlock (Fig. 166) - With the car-
rier return clutch latch (in a carrier return operation)
the upright lug of th~ tab latch should clear the end of
the tab lever pawl by .005" - .025". The rear lug of
the tab latch should be formed forward . .or back to ob-
tain this condition.
NOTE: After this adjustment is made, the carrier re-
turn mechanism should be unlatched and a tab lever
latched out. The rear lug on the tab latch should
again be checked to ensure that it is not touching
the escapement torque bar.
Torque Bar
Tab Lever7lf.005" To .025"
~
....
~"" ~~'~
\ I
'''')
-
....
/
I Escapement
Bar
FIGURE 166. Interlock
9. Tab Trigger Extension (Fig. 167) - Form the front
(curved) lug of the tab trigger to-obtain .016" - .023"
clearance between this lug and the tab torque bar with
JlII parts at rest.
FIGURE 167. Tab Trigger Extension
10.
II.
2-49
Tab Lever Overthrow (Fig. 168) - With the tab cam on
its high point, adjust the torque bar actuating link for
.005" - .010" overthrow between the tab latch and tab
lever.
NOTE: The carrier should be tapped lightly to the
left before checking this adjustment. It should also
be checked with the carrier in the center of its travel.
Be sure that the overthrow stud (Fig. 170) does not
interfere with this adjustment.
Tab Torque Bar
FIGURE 168. Actuating Link, Machine
Tab Lever Overthrow Stop and Retaining Plate (Fig.
169) - Replace the tab torque bar overthrow stop and
retaining plate ond position it so that the overthrow
lug falls directly in line with the upper lug on the
tab trigger and retaining plate when positioned against
the torque bar maintains .001" - .002" clearance be-
tween the torque bar and escapement bracket. The
outer lug or overthrow stop should then be formed for
.005" - .010" clearance between the tab lever trigger
and the overthrow lug with the tab canion its high
point.
Trigger
FIGURE 169. Tab Lever Overthrow Stop &
Retaining Plate (New)