Teletype 43 Teleprinter Basic RO, Service Manual

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MANUAL 406,2-9
LINE FEED BELT TENSION (Sprocket Feed Only)
Note: This adjustment applies to Sprocket Feed (Early Design) only, without follower pulley.
Requirement
When the belt and sprocket system is at the point of least slack; a force of 5 ounces applied with a
spring scale midway between the sprockets the belt should deflect between
Min 0.090 inch---Max 0.120 inch
The point of least slack is the point where the set screws on the platen pulley and those on the motor
pulley are set as shown below.
To Adjust
Rotate the platen until the set screws on the platen pulley and the set screws on the motor pulley are
aligned as shown below. Loosen motor screws, position motor to meet requirement at the point of
least slack. Tighten screws.
SET
SCREWS
SET SCREWS
LINE UP SPRING SCALE
MIDWAY BETWEEN PULLEYS
(Left Side View)