Brother MFC-J6510DW Service Manual page 243

(3) Remove the SB timing belt from the left end of the engine unit.
(4) On the left end of the lower cover, release the four harnesses (paper feed motor harness, PF
encoder/PF sensor harness, registration sensor harness and switchback paper sensor
harness) from the cable guides.
(5) Remove the two screws from the engine unit.
(6) Lift the engine unit up and out of the lower cover in the direction of the arrow shown
below, holding the inner chute located beneath the CR guide rail.
Note: Do not hold the CR guide rail.
Note: Take care not to touch the PF encoder disk.
Note: If the ink absorber box does not need to be replaced, be sure to take it out of the
lower cover together with the engine unit. If the main drain tube and air vent tube are
disconnected from the ink absorber box, they are reusable only one time by trimming their
ends vertically 10 mm with scissors clear and free of oil. Check that their cut surfaces are
free of oil. If it is the second time for those tubes to be disconnected, they need to be
replaced.
Note: Do not place the engine unit directly on a flat surface; doing so may break the PF
encoder disk and gears. Be sure to place a support pad under the engine unit as shown
below.
(7) Take the flushing box and ink absorber felt out of the lower cover.
Engine unit
Taptite, cup B
M3x10
PF encoder disk
Paper feed
motor harness
Registration
sensor harness
PF encoder/
PF sensor harness
SB timing belt
Flushing box
Switchback paper
detection sensor
harness
3-118
PF encoder disk
ASF encoder harness ASF motor/encoder harness
ASF motor harness
Purge cam switch harness
Carriage motor harness
Ink absorber felt
Lower cover
(Front)
Support pad
Engine unit
(3_088)
Confidential