Brother DCPJ525W Service Manual page 202

ADF drive unit
(27) Remove gear 36/54 by releasing its latch, then remove the separation roller gear (outer) and
idle gear 56.
(28) Remove gear 31 by releasing its latch.
(29) Remove the bushing from each of the document feed roller shafts 1 and 2.
Separation roller gear
(Outer)
Latch
Gear 36/54
Idle gear 56
Assembling Note: Set the ADF-related gears into place as shown below.
ADF motor
harness
Separation roller gear
(Outer)
(Rear)
Latch
Gear 31
(Rear)
Gear 36/54
Idle gear 56
Gear 31
ADF unit
Bushings
ADF harness ASSY
(Bundle of ADF motor harness and
its grounding wire, document detection
sensor harness, and document scanning
position sensor harness)
Grounding wire
ADF harness ASSY
(Bundle of ADF motor harness and
its grounding wire, document detection
sensor harness, and document scanning
position sensor harness)
3-65
Document feed roller 1
(Left)
Document feed roller 2
(Left)
Confidential
(3_060)
(3_061)