W522


1. Machine Bed Frame	2. Cover (1)

3. Cover (2)	4. Crankshaft Mechanism

5. Arm Shaft Mechanism	6. Needle Bar Mechanism

7. Needle Guard Mechanism	8. Looper Mechanism

9. Feed Mechanism(1)	10. Feed Mechanism(2)

11. Presser Foot Mechanism	12. Spreader Mechanism

13. Needle Spreader Thread Handling	14. Looper Thread Handling

15. Lubrication Mechanism(1)	16. Lubrication Mechanism(2)

17. HR Device	18. Semi-Submerged Installation Parts

19. Special Parts