TM 10-3530-207-14
4-49. BUTTON SEWING MACHINE MAINTENANCE ADJUSTMENT PROCEDURES - continued.
h.
To adjust the looper with relation to the needle.
(1)
Loosen the looper set screw (1) and set the looper as close as possible to the needle, but without
actually touching it.
(2)
Be sure that the set screw (1) engages the "flat" of the looper shank when this screw is tightened.
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