5-58. BUTTON SEWING MACHINE CAM AND DRIVE SHAFT MAINTENANCE continued.
(5) Install needle bar cam (5). Line up the large end of the tapered hole in the needle bar cam (5) with
the large hole in the feed cam shaft (3). Secure with tapered cam pin (6)
(6) Push needle bar cam (5) and feed cam wheel (2) together enough to eliminate side play, but not too
much to cause binding Check feed cam shaft (3) and feed cam wheel (2) with previous marks. Tighten
(7) Install feed cam (7). Line up with previous marks on feed cam wheel (2) Secure with two screws (9)
and two washers (8).
Time the button clamp feed cam (para. 2-13).