Teletype 28 - Perforator Drive Link Spring

2. 21 Punch Mechanism (continued)
Note: Before proceeding with the punch
mechanism adjustments, check the CAM
FOLLOWER
ROLLER (2.18) adjustment and
loosen the punch slide· downstop mounting
nut
and guide mounting stud.
PUNCH PIN
PUNCH SLIDE
GUIDE
(Front View)
PERFORATOR
DRIVE LINK
PERFORATOR DRIVE
LINK SPRING
Requirement
ISS 8, SECTION 573-118-700TC
(A) TOGGLE BAIL ECCENTRIC (Preliminary)
Requirement
.----The indent (high side of eccentric)
should be in its uppermost position.
To Adjust
With the toggle bail eccentric shaft
locknut friction tight, position eccentric.
Tighten nut.
ALTERNATE
MOUNTING~+·-·""
BRACKET SHAFT
(B) TOGGLE OPERATING ARM
(1)
Requirement
(Front
View)
Trip function clutch and rotate main-
shaft until the upper rocker bail
roller is on high part of its cam.
'--------Min 0.002 inch---Max 0.005 inch
clearance between fe~d pawl stud and
'the TP159926 gauge.
..---- Min 3-1/2 oz---Max 8 oz
(2) Requirement
OPERATING
ARM SHAFT
"
CLAMP~
SCREW
to pull spring to installed
length.
BEARING
HUB
(Left Side View)
Clearance between arm and oscil-
lating shaft bearing hub .
.-------Min0.002 inch---Max0.015 inch
with play taken up in direction to
make clearance minimum.
To Adjust
With clamp screw friction tight, posi-
tion toggle bail and operating arm.
Tighten screw.
Note: After FEED PAWL (2.25) adjust-
ment has been made and PVNCH PIN
PENETRATION (2.23) and FEED PAWL
requirements are met, this requirement
should be considered fulfilled.
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