Teletype 28 Manual page 118

SECTION 573-115-700TC
3. 42 Letters- Figures Code bar Shift Magnet Mechanism
(A) SHIFT MAGNET YOKE
Requirement
Clearance between armature and end of heelpiece should be
Min some---Max 0.003 i n c h - - - - - - - - - - - - - - - - - - - - - - - ,
To Check
Magnet armature held against core. Check clearance across end of heelpiece.
To Adjust
Position yoke with its clamp screw loosened.
Note: Keep pole face free of
oil and grease.
PRY POINT
(Left Side View)
~MATURE
ARMATURE
BACKSTOP
SCREW
SHIFT
(B) SHIFT MAGNET ARMATURE
~
\---------
dU3ll... ~~
CODEBAR
(1) Requirement TRANSFER-
Clearance between armature and LEVER
lJ--
TRANSFER
transfer lever should be ai). MAGNET
~
LEVER
Min some---Max 0. 005 inch BRACKET
I
F
BRACKET
To Check
Magnet armature attracted. Shift codebar
in full marking position.
To Adjust
Position magnet forward or backward
with bracket mounting screws loosened.
Tighten screws.
(2) Requirement
Clearance between armature and
transfer lever should be
Min some---Max 0. 010 inch
To Check
Magnet armature unoperated. Shift
codebar in full spacing position.
To Adjust
Position armature backstop screw with
locknut loosened. Tighten nut.
PILOT PIN
Page 118
I
(C) SHIFT MAGNET ARMATURE RETURN
SPRING
Requirement
'-----Min 1 oz---Max 3 oz
to pull spring to installed length.
(D) SHIFT CODEBAR RETURN SPRING
Requirement
..----Min 3 oz---Max 7 oz
to start codebar moving.
To Check
Trip typebox clutch, rotate main shaft
until printing track is in lowest position.
TIE BAR
LTRS - FIGS SHIFT CODE
BAR EXTENSION POST
(Front View)