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Upper Knife Lever / Upper Knife Arm / Feed Adjusting Cam - Brother SB3734T Service Manual

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Disassembly
8

Upper knife lever / Upper knife arm / Feed adjusting cam

1. Remove the screw (set screw, socket (CP) M4x4) from arm bed. Pull out the upper knife lever shaft to
remove the upper knife lever.
2. Remove the retaining ring E5 from the upper knife lever shaft.
3. Remove the screw (set screw, socket (CP) M4x4) to remove the upper knife adjusting shaft from the
upper knife arm.
4. Remove the screw (set screw, socket (CP) M4x4) from the upper knife arm. Pull out the upper knife
lever shaft to remove the upper knife lever and the vertical feed block from the upper knife arm.
5. Remove the feed adjusting cam from the feed adjusting cam shaft.
6. Remove the screw (set screw, socket (CP) M4x8) to remove the feed adjusting cam shaft.
Set Screw, Socket (CP) M4X4
Set Screw, Socket (CP) M4X8
Set screw, socket (CP) M4x8
Set screw, socket (CP)
M4x4
Feed adjusting cam shaft
Feed adjusting cam
Upper blade / Lower blade / Looper
Arm bed
Set screw, socket (CP)
M4x4
Upper knife lever
Upper knife lever shaft
Fig. 2-8
2 - 32
Upper knife arm
Upper knife adjusting shaft
Set screw, socket (CP) M4x4
Vertical feed block
Upper knife lever shaft
Retaining ring E5

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