BUTTON SEWING MACHINE CAM AND DRIVE SHAFT MAINTENANCE
This task consists of:
INITIAL SETUP :
General Mechanics Tool Kit (Appendix B,
Vibrating Lever removed (para. 5-56).
Lifting Lever removed (para 5-52).
Thread tension rod assembly removed
Rag, wiping (Appendix F, Item 2)
Cleaning Solvent (Appendix F, Item 8)
Carrier arm removed (para 5-55).
Brush, Medium Bristle (Appendix F, Item 1)
(1) Mark the location of the feed cam (1) to feed cam wheel (2).
(2) Remove two screws (3), two washers (4), and the feed cam (1).
(3) Drive out tapered cam pin (5). Remove needle bar cam (6), feed cam shaft (7) and feed cam wheel
(4) Mark on feed cam wheel (2), the location to the feed cam shaft (7). Remove two setscrews (8),
wheel trip point (9), and the feed cam wheel (2).