Brother HL-4040CN, HL-4050CDN, HL-4070CDW Service Manual page 132

(2) Hold the Green handle of the Drum unit. Lift the drum unit up and then pull it out until it
stops.
Drum unit
Note:
If you cannot pull the drum unit out, make sure that the front door unit ASSY is fully open
as shown below.
2a
2b
Fig. 3-3
Fig. 3-4
3-23
Green handle
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