2-4. Bobbin presser mechanism
Remove the two extension springs q.
Remove the shoulder screw w, and then remove the opening plate e from the rotary hook cover r.
Remove the shoulder screw t, and then remove the bobbin presser bracket y and the auxiliary plate u.
Remove the shoulder screw i, and then remove the auxiliary plate u and the opening plate e.
Loosen the set screw o, and then remove the bobbin presser !0 from the bobbin presser bracket y.
Remove the screw ! 1 and the nut ! 2 .
Remove spring hook U ! 3 .
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