Oki ES 1624n MFP User Manual page 97

Holding the fuser by its handle, lift the fuser out of the printer. If
3.
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.
Remove the new fuser from its packaging, then remove any
4.
packing tape.
Push the orange transport lock to the left to release it (you'll hear
5.
it snap), then remove it:
Replacing Consumables • 97