Brother HL-4140CN Service Manual page 222

(5) Remove the three Screw bind M3x4 screws to remove the Drum drive motor from the Top
drive ASSY.
Drum drive motor
Assembling Note:
Align the phase of the Drum idle gear Z64, Drum idle gear Z64 first, and Drum coupling
gear Z52. (Refer to "6. IF YOU REPLACE THE DRUM DRIVE MOTOR" in Chapter
Harness routing: Refer to
Screw bind M3x4
Fig. 3-89
" Top Drive ASSY"
3-74
Top drive ASSY
4.)
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