Brother HL-3040CN Service Manual page 269

(5) Remove the two Taptite cup S M3x6 SR screws and two Taptite bind B M4x12 screws,
and then remove the Develop drive plate ASSY from the Side frame L.
Develop drive plate ASSY
Taptite cup S M3x6 SR
(6) Remove the one Gear 63/85, one Pendulum gear 50, one Idle gear 35,
two Idle gear 30 and two Gear 42/39 from the Side frame L.
Gear 63/85
Side frame L
Fig. 5-109
Pendulum gear 50
Fig. 5-110
5-95
Taptite bind B M4x12
Side frame L
Gear 42/39
Idle gear 30
Idle gear 35
Confidential