IBM 3 User Manual page 266

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4247 Model 003 User's Guide
1. Open the top cover and tilt it all the way back.
Attention: Do not remove the top cover or automatic sheet feeder cover
unless it is necessary for the installation of a printer accessory. If a cover is
removed, do not touch inside the printer or insert any object into the gears.
Store the cover in a safe place until it is needed for reinstallation.
2. Lift the forms guide to its full open (vertical) position.
3. Locate the push-pull selector next to the gears on the left side of the printer.
Pull the push-pull selector toward the front of the printer until the gear shafts