Lexmark W810n - Optra B/W Laser Printer Reference page 157

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Grasp the old fuser with both hands and pull it straight out of
the printer.
If you agreed to return your old fuser to Lexmark in order to pay a
reduced price for the new one, place the old fuser in the new
fuser box and mail to Lexmark.
Otherwise, discard the old fuser.
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