Needle Bar Mechanism; Looper Mechanism - Brother CB3-B917 Service Manual

1-4. Needle bar mechanism

Needle bar clamp
Needle bar
Needle

1-5. Looper mechanism

113s
Needle bar clamp
connector
5. Rocking motion
6. Vertical motion
Triangular cam
Looper (Rotary)
Loop spreader
Loop spreader base
CB3-B916A/B917A
Needle bar drive lever
4. Rocking motion
3. Vertical motion
2. Eccentric
Lower shaft
Drive shaft
Helical gear
Drive shaft
112s
Loop spreader guide
Triangular cam
114s
1. MECHANICAL DESCRIPTIONS
Crank rod
Stop cam
1. Rotation
Pulley
111s
Lower shaft helical gear
Loop spreader groove
115s
cam
4