Mechanical Descriptions; Needle Bar And Thread Take-Up Mechanism; Lower Shaft And Rotary Hook Mechanism - Brother LZ2-B850 Service Manual

2. MECHANICAL DESCRIPTIONS

2. MECHANICAL DESCRIPTIONS
Operate in the order of the numbers in the illustration.
The G , I and other symbols with the numbers indicate different sequences of operation which can occur at the same
time.

2-1. Needle bar and thread take-up mechanism

4. Thread take-up lever shaft
G5. Rotary thread take-up lever

2-2. Lower shaft and rotary hook mechanism

13. Rotary hook
12. Rotary hook shaft
2-01
7. Lower shaft gear
6. Lower shaft
10. Bevel gear
9. Driving shaft
11. Bevel gear
3. Thread take-up crank
2. Upper shaft
I5. Needle bar connecting rod
I6. Needle bar clamp
I7. Needle bar
2. Upper shaft
3. Timing pulley U
5. Timing pulley D
8. Driving gear
LZ2-B850,B851
1. Pulley
1089S
1. Pulley
4. Timing belt
1090S