Oki COREFIDO B822dn User Manual page 339

3
While pushing the blue lever on the left side of the front paper feed roller (without gear) to the left,
slide the paper feed roller (without gear) to the left to remove it.
4
While pushing the blue lever on the right side of the rear paper feed roller (with gear) to the right,
tilt the paper feed roller (with gear) downward to remove it.
5
Mount the new paper feed roller (with gear). While pushing the right blue lever to the right, mount
the paper feed roller (with gear) onto the black shaft.
6
Release your hand from the blue lever.
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