IBM 01 Maintenance Manual page 43

REFERENCE MANUAL MODEL 01
Figure 22. Tabular Mechanism
careful not to disturb the adjustment of the inside nut on
the left end of the rack. In this manner the overbank
adjustment should not change. Move the tab lever assembly
to the rear far enough to clear the dowel pin and lift the
assembly out through the top of the carriage.
TAB LATCH. To facilitate removal of the tab latch, it is
advisable to back out the mounting screws that mount the
TKO lever to the rear rail. Obtain further clearance by
removing the margin rack.
Adjustments
1. CAM CLEARANCE. Adjust cam clearance to the power
"011 so that the cam release lever will drop behind the cam
lug when tripped with the power off. Be sure the leather
stop of the tab bell crank is touching the underneath side
of the key lever spring support when this adjustment is
observed (Figure 22).
2. TAB LEVER HEIGHT. Adjust height so that it will just
clear the under side of the margin rack by .010" to .015".
rhis adjustment is made by means of the eccentric stud on
which the tab actuating lever rests (Figure 22).
3. TAB' RACK (two ways.) Clearance between the left-
hand faces of the tab stops and the engaging face of the
tab lever is from .002" to .015", tested at both ends and the
middle of the rack. Position the carriage so that a set tab
rtop is even with the tab lever. Slowly move the tab lever
out toward the rear by hand and observe the amount of
clearance between the parts indicated. The continued motion
of the tab lever will remove the escapement pawl from the
rack. The reading will have no value, unless the carriage
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