Brother HL-4040CN Service Manual page 132

(3) Raise the Handle of the Toner cartridge to release the Locks. Then, hold the Handle of the
Toner cartridge and pull it out of the drum unit.
Lock
(4) Repeat Step (3) for all the other Toner cartridges.
Handle
Toner cartridge
Fig. 3-5
Fig. 3-6
3-24
Lock
Toner cartridge
Confidential