5-21. CLOTHING SEWING MACHINE ARM SHAFT AND VERTICAL SHAFT MAINTENANCE.
This task covers:
INITIAL SETUP :
Equipment Condition :
General Mechanics Tool Kit (Appendix B,
Needle bar and thread take-up removed (para 5-18)
Rag, wiping (Appendix F, Item 2)
Cleaning Solvent (Appendix F, Item 8)
Brush, Medium Bristle (Appendix F, Item 1)
(1) Loosen setscrew (1) and remove shuttle shaft (2).
(2) Remove top half of crank rod (3) by removing two screws (4).
(3) Remove shaft shuttle and arm assembly (5).
Loop of crankshaft must match outline of casting hole in order to remove.
(5) Remove crankshaft pulley assembly (6) by loosening setscrew (7) from feed cam and placing a piece
of wood or other soft material on the end of the shaft and gently tapping it out.