Brother DCP-J552DW Service Manual page 169

(10) Remove the ADF cover ASSY.
ADF cover ASSY
ADF separation pad holder ASSY
(11) Remove the ADF separation pad holder and its spring.
Note Be careful not to let the spring to fly out.
ADF separation pad holder
Spring
Assembling Note Insert the spring first into the opening then attach the ADF separation pad holder.
ADF cover ASSY
3-52
Upper document chute
Confidential
(3_068)
(3_069)