Back Space - IBM 01 Maintenance Manual

BACK SPACE
Preventive Maintenance, Standard Models
Except Decimal Tabulation
BACK SPACE PAWL must be lubricated and kept clean.
ESCAPEMENT PAWLS must operate freely and without
binds to insure good back space operation.
Adjustments
Standard Models Except Decimal Tabulation
Interlock bracket formed to I.ft
with screwdriver for minimum
clearance
her.
Fid,ure 41. Back ,Space Interlock
ADJUST THE INTERLOCK by forming the bracket which
supports the interlock lever, in such a manner that aU
clearances are very close. Figure 41 shows how the brac-
ket may be pried in one direction with a screwdriver· to
close the clearance between the lug on the end of the
interlock lever and the edge of the back space pawl.
Figure 42 illustrates a method of increasing the clearance
between the lug on the end of the interlock lever and
the back space pawl. The clearance must be held to an
absolute minimum to block any motion of the back space
pawl while the interlock is in the operating position. Test
by holding down a carriage release button and moving
the back space pawl by hand.
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