Tabulator Mechanism (Late) - IBM Selectric Maintenance Manual

are set. The gang clear finger can be moved right
or left slightly to insure positive clearing of desired
stop. The tab stop directly to the left may also be
cleared or partially cleared.
TABULATOR MECHANISM (LATE)
I. Interlock Switch (Fig.
161)
2.
a. With the torque bar in the rest position, form the
horizontal lug on the left end of the tab torque bar
so that .010" - .015" exists between the tabswitch
trigger and its latching surface.
b. Tab interlock switch bracket. Adjust by its mount-
ing screws for two conditions.
I. Up and down so that the torque bar is vertical
in the rest position. Be sure that torque bar
I inkage does not interfere when making this
adjustment.
2. Front to rear so that .001" - .002" clearance
exists between the tab switch trigger and the
rear edge of the tab torque bar extension.
3. Adjust the switch by its mounting screws for
. 002" - .008"
clearance between the switch
plunger and trigger.
FIGURE
161.
Tab Interlock Switch (late)
Escapement Bracket (Fig.
98) -
Observe the
.00
I" -
.002"
clearance between the escapement bracket and
the tab torque bar. If this adjustment is incorrect, all
escapement adjustments should be made before proceed-
ing
wit~
the tab adjustments.
4.
5 •
6.
Tab Lever Stop
FIGURE 162. Tab Lever-Stop
Escapement Torque Bar Stop - Observe an .008" - .010"
clearance between the escapement torque bar and the
lug of the escapement pawl (Fig. 100). Check the pawl
mounting stud for
.001"
clearance between it and the
escapement torque bar (Fig.
102).
This adjustment
should be checked at the left and right sides of the
printer. On IS" printers, final adjustment should be
made with a pawl mounting stud directly opposite the
escapement torque bar back-up (Fig.
103).
Tab Lever Pawl (Fig.
163) -
Adjust the pawl forward or
back on the tab lever so that the tip of the pawl clears
a set tab stop by
.035"
to
.050".
This adjustment
shou Id be checked on the left, center, and right of
carrier travel.
Tab Rack
,---d
_ " n-If-'-
Tab Lever -
~---
J _
.035"
To
.045"
~~AdjUst
Tab Lever
-=-V
d "
UV
Pawl
FIGURE
J63.
Tab Lever Pawl
Tab Rack (Fig. 164) - With the tab cam on its high
point, adjust the tab rack left to right for
.005".:-
.020"
clearance between a set tab stop and the side
of the tab lever pawl.
Tab Rack Plate
NOTE: This adjustment should be checked with the
overflow stop and retaining plate removed from the
printer. Leave the overthrow stop and retaining plate
off for the following adjustments.
~ 1-3/32
Tab Stop Tab Rack -I
I
Tab Rack
Adjust Tab Rack
~
Bushing
Bushing
_~~
3. Tab Lever Stop (Fig. J 62) - Form the stop on the escape-
ment bracket to obtain
.OOJ" - .006"
clearance between
the vertical lug on the tab lever and the backspace pawl
when the tab lever is at rest and the backspace pawl is
fully seated in its rack. On printers without backspace,
adjust for .OOJ" to
.007"
between vertical lug on the
tab lever and the escapement pawl.
2-48
Table~~
jJ
o - .
0
~~
".005"
To
.020"
. Tab Pawl
FIGURE 164.
Tab Rack Bushing