TM 10-3530-207-14
5-50. BUTTON SEWING MACHINE THREAD RELEASE AND NIPPER MAINTENANCE.
This task covers:
a.
Removal
b.
Cleaning
c.
Inspection
d.
Repair
e.
Installation
f.
Adjustment
INITIAL SETUP :
Tools:
Material/Parts:
General Mechanics Tool Kit (Appendix B,
Cleaning Solvent (Appendix F, Item 8)
Item 1)
Brush, Medium Bristle (Appendix F, Item 1)
Equipment Condition:
Rag, wiping (Appendix F, Item 2)
Side covers removed (para 5-42)
Thread removed (para 2-13)
Removal.
(1) Remove the thread nipper screw (1), plate screw (2), thread nipper plate (3), and the plate washer
(4).
(2) Loosen two setscrews (5). Remove thread release head (6) with thread rod (7), lower spring (8),
spring washer (9), two thread collars (10) and the thread release spring (11).
(3) Remove thread release head (6) from thread rod (7).
(4) Remove hinge lever screw (12) and thread release lever (13).
(5) Remove thread nipper stud (14), stud washer (15) and stud nut (16) from thread release lever (13).
5-144