Brother SB3734T Service Manual page 24

Disassembly Main frame / Covers / Upper thread guide
4. Remove the screw (bolt, socket M3x12). Loosen the nut 1 M4 to remove the tension dial. (four
locations)
Bolt, Socket M3X12
Tension dial (yellow)
Tension dial (green)
Nut 1 M4
Tension dial (pink)
Tension dial (blue)
Nut 1 M4
Bolt, socket M3x12
Fig. 2-11
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