JUKI Jtron JTR-KM3680N/WSU Series Instruction Manual page 19

6.2) Roller replacement
6.2.1) Lower puller replacement
6.2.1.1) Detach the cover from the stated screws (2 pieces)
6.2.1.1) Remove assembly plate wit the "A" screws(4 pieces)
A
6.2.1.1) Remove the the plate by removing the imbus screw(1 piece)