Bell System Practices Plant Series Adjustments page 7

should then be hooked over the top of the se­
lector coil terminal (bakelite)
spring tension of the clip will hold the arma­
ture in the marking (attracted) position.
Fully disengage all clutches as described
1. 11
in the note following Par. 1.09. Release
the armature momentarily to permit the se­
lector clutch to engage.
slowly until the no, 5 selector lever has just
moved to the peak of its cam.
selector levers all push levers which are spac­
ing in the code combination that is being se­
lected. It should be noted that selector levers
(Par. 2. 12) move in succession, starting with
the inner (no. Continue to rotate the main
1).
shaft until all operations initiated by the se­
lector mechanism clear the typing unit.
VARIABLE FEATURES
In addition to the basic unit adjustments,
1. 12
covered in Part 2,
number of variable features appear in Part 3.
Where adjustments of these variable features
affect the adjustment sequence, cross reference
information has been included in Part 2.
able feature adjustments which do not affect the
adjusting sequence, may be done at any time
during the adjusting procedure.
EARLIER DESIGN MECHANISMS
Parts 2 and 3 contain illustrations and
1. 13
adjusting procedures for mechanisms
currently being manufactured.
adjusting procedures for mechanisms of earlier
design are located in Part 4.
mechanism has replaced a mechanism of earlier
design, reference has been made in Parts 2 and
3 to the corresponding mechanism in Part 4.
guard. The
Turn the main shaft
Strip from the
adjustments for a
Vari­
Illustrations and
Where a new
I S S 7, SECTION 573-115-700
COMPLETE ADJU STMENT OF TYPING UNIT
When making a complete adjustment of the
1. 14
typing unit, the following conditioning op­
erations should be performed to prevent damage:
(a) Loosen the clamp screw on the code bar
shift lever drive arm (Par. 2. 15).
(b) Move the right and left vertical position-
ing lever eccentric studs (Par. 2. 28 and
2. 29) in the rocker shaft brackets to their
lowest position.
(c) Loosen the two bearing stud mounting
screws and two connecting strip clamp
screws in the horizontal positioning
linkage (Par. 2. 35).
(d) Loosen the clamp screws and move the
reversing slide brackets to their upper­
most position (Par. 2. 34).
(e) Loosen the function
mounting screws (Par. 2. 32).
(f)
For units equipped with two- stop function
clutches: Loosen the shoulder bushings
on each function stripper blade arm and move
stripper blade and arms to their lowest posi­
tions (Par. 4. 18).
(g) Loosen the carriage return lever clamp
screw (Par. 2. 40).
(h) Loosen the clamp screws in the oscil­
lating rail slide (Par. 2. 30).
(i) Loosen the reversing slide adjusting stud
(Par. 2. 34).
(j) Loosen the clamp nuts on the shift code
bar guide plates (Par. 2. 33).
drive
reset bail blade
Page 7