Lexmark C78x Service Manual page 303

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When replacing the front roll, the dots (A) on the outside of the tire should be facing the front of the printer.
Rear roll
Reach around and depress the latch (A) on the end of the shaft, and remove the roll.
Installation note for the rear roll:
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When replacing both the front and back rolls, note the directional markings on the roll and make sure the
rolls turn clockwise when viewed from the front. Check out the directional arrows in the pictures. Verify the
rolls turn freely.
A
5061
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Repair information