Lexmark 4227 - Forms Printer B/W Dot-matrix Service Manual page 77

4227-300
6. Loosen the two tension pulley plate screws (2). Pull up on both
sides of the belt to move the tension pulley plate as far as
possible toward the center of the printer, and then retighten the
large screw.
7. Remove the belt from the carrier motor pulley.
8. Push the tension pulley toward the outside of the printer and
remove its shaft through the large part of the keyhole. Push the
pulley up and remove it to free the carrier belt.
Repair information
4-13