Table 3-1. Operator troubleshooting - continued
TEST OR INSPECTION
BUTTON SEWING MACHINE
Step 5. Two-hole or four-hole regulator is not set to correspond with number of holes in button.
Replace broken needle with new needle of correct size, class, and variety (paras. 2-
13a and 2-13b).
Set two-hole or four-hole regulator to the position corresponding to the number of
holes in the button (para. 2-13j). Lock button clamp in position with thumbscrew
Step 6. Button clamp is out of adjustment.
Adjust (refer to para. 2-13k).
Step 7. Looper is out of adjustment.
Notify next higher level of maintenance.
Step 1. Check that machine is threaded correctly.
Rethread machine in accordance with para. 2-13c.
Step 2. Check needle size, class and variety.
Install new needle of correct size, class, and variety (paras. 2-13a and 2-13b).
Step 3. Check needle point.
Install new needle of correct size, class, and variety if needle point is blunt, blurred,
or broken (paras. 2-13a and 2-13b).
Step 4. Check thread tension.
Adjust thread tension if tension is too tight or too loose (para