Brother HL-3400CN Series - Manual (Page 167)

USER’S GUIDE
5-10
3. Release the Fuser Cleaner Lock Levers on both sides as shown below:
Fig. 5-8 Release the Levers
4. Take the Fuser Cleaner out of the Fusing Unit by holding the handle
of the Fuser Cleaner as shown below.
Fig. 5-9 Removing the Fuser Cleaner
5. Install the new Fuser Cleaner into the guide with the roller side facing
you.
Fig. 5-10 Installing the Fuser Cleaner