Oki C5100 User Manual page 110

3. Holding the fuser by its handle, lift the fuser out of the printer. If
the fuser is still warm, place it on a flat surface which will not be
damaged by heat. After letting the fuser cool down, discard it.
4. Remove the new fuser from its packaging, then remove any
packing tape.
5. Push the orange transport lock to the left to release it (you'll hear
it snap), then remove it:
C5100 Replacing Consumables • 110