Teletype 28 - Page 108

SECTION 573-118-700TC
3. 28 Manual and Power Drive Backspace Mechanism (For Chadless Tape)
(Early Design) (continued)
DRIVE ARM (Preliminary)
Requirement
With drive arm latchlever engaged with eccentric lmk, main shaft rotated to place
eccentric in its extreme right-hand position and feed wheel detented back one space
...---Min some---Max 0.003 inch
clearance between the backspace feed pawl and the ratchet tooth. Check with feed
wheel shaft oil hole in the uppermost position and recheck each 90 degrees about
the periphery of the feed wheel.
To Adjust
Loosen drive arm screw friction tight, and move adjusting plate.
FEED PAWL
Page 108
RATCHET
WHEEL
ADJUSTING
PLATE
,_---DRIVE ARM SCREW
HIGH
PART OF ECCENTRIC-
ECCENTRIC LINK
(Front View)