3 - 8Rotary hook drive mechanism / Feed and bobbinmechanism /Cutter assy.Main unit1 Assembling the Lower shaft A assembly1. Attach the retaining ring E6 to the lower shaft A 1.2. Attach the thrust washer 2, lower shaft bushing 3, thrust washer 2 andset screw collar 4 (Face the ground surface toward the lower shaftbushing).3. Move the set screw collar 4 to the right and secure it with the 2 screws 1.1 Torque1.47 – 1.98 N·mRetaining ring E61 324 1Set Screw, Socket (CP)M4X42 Timing pulley D attachment1. Attach the retaining ring E6 to the lower shaft A 1.2. Attach the timing pulley D 2 to the lower shaft A 1, and attach theretaining ring E6.3. Hand start the 3 screws 1 in the timing pulley D 2.(Fully tighten after 4 - 8 "Needle bar rise adjustment".)*Key point• With the lower shaft A D cut 3 facing forward, secure usingone of the three screw holes in the timing pulley D 2 in theforward facing position.1 Torque1.18 – 1.57 N·mFace forwardRetaining ring E63 2Retaining ring E61 (x 3)11Set Screw, Socket (FT)M5X53 Joint attachment1. Put the lower shaft bushing 1 on the lower shaft A assy.2. Put the joint 2 on the lower shaft A assy., and hand start the 2 screws 1(fully tighten after 3 - 9 "5 feed module attachment.)*Key point• Align the screw hole 3 in the joint with the D cut 4 in lowershaft A.1 Torque1.18 – 1.57 N·m2 13 41 (x 2)Set Screw, Socket (FT)M5X5
