IBM 3 User Manual page 248

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4247 Model 003 User's Guide
e. Grip both sides of the round tractor shaft while operating the tractor
release levers as shown. Lift the tractor out of the printer and set it aside.
CAUTION:
<2-53> If the front tractor unit is not installed, make sure the gear
protector cover is closed. Do not touch inside the printer or insert any
object into the gears.
f. Close the gear protector cover and the front tractor cover.
g. Place the tractor face down on a flat surface with the electrical connector
tab on the right side, pointing toward you.
h. Pull the bottom release levers toward you with your finger tips and pull
the movable edge of the tractor up away from the flat surface with your