Teletype 28 - Selector Armature Spring (Final); Selector Armature Downstop (Preliminary)

ISS 8, SECTION 573-118-700TC
2. 03 Selector Mechanism
Note: To facilitate making the following adjustments, remove the range finder assembly and
selector magnet assembly. To insure better operation, pull a piece of bond paper between the
armature and the pole pieces to remove any oil or foreign matter that may be present. Make
certain that no lint or pieces of paper remain between the pole pieces and the armature.
(Front View)
1111
II
-
--~~~~=r==~~==~~. _..., I I ....,
0
foil I I CASTING
JV-- I I; I t/ / PIVOT EDGE
i I
SELECTOR ARMATURE
Note:
These requirements need not be
made nor checked if the selector magnet bracket
and receiving margin requirements are met.
(1) Requirement
Clearance
Min 0.010 inch fl.._.J ~ : 4 ~ POLE
between armature hinge clamp strip and the pivot edge ~ ~ PIECE
of the magnet bracket casting at their closest point. I .
(2) Requirement
Outer edge of armature should be flush within 0.015 inch ':c?"' = -:,
.with outer edge of both pole pieces.
(Left Side View)
(3) Requirement
Start lever should drop freely into armature extension slot.
To Adjust
Position armature spring adjusting nut to hold armature firmly against pivot edge of casting.
Position armature with mounting screws loosened. Tighten screws.
ARMATURE SPRING ADJUSTING NUT
(Front View)
POLE PIECE\ "c:::::::' ""7---' I
SELECTOR ARMATURE DOWNSTOP (Preliminary)
Requirement
With magnet de-energized, locklevers on high part of their cam, and armature resting
against its downstop, clearance between end of armature and left edge of left pole piece
Min 0. 030 inch---Max 0. 035 inch-------------------------.1
To Adjust
Position downstop bracket with mounting screw loosened. Tighten screw.
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