IBM 01 Maintenance Manual page 272

MODELS 4 and 5
CUSTOMER ENGINEERING
Figure
1.
Escapement Selector Mechanism
SELECTOR BARS AND BAIL CONTACT.
Where differences
exist between the points of contact of bars and bails, bars
should be formed (up to open, and down to close the
clearance).
(
(
(
PAWL END'S AND INTERPOSER CLEARANCE
should be
adjusted by moving the trip lever stud backward or for- (
ward until .010" to .020" clearance is obtained between
the rear edge of the 8 pawl and the operating edges of
the interposers (Figure 2). Move the left hand rail sup-
port to the rear if necessary.