SINGER 14T967DC-WORKBOOK QUANTUMLOCK - Manual (Page 121)

10. Thread the looper eye (A) from front to back. Pull about 4 inches of thread.
Position thread into V cutout (B) on threader. Firmly hold thread tail with left
hand and pull Threader lever (C) up into place (D).
Thread Right Overedge needle with regular overlock thread.
1. Raise the Presser Foot to release the tension disks. Thread the right
needle as illustrated 1-9.
2. Pass thread from back to the front
through the thread guide .
Threader Lever
“V” cutout
Four-Thread Ultra-Stretch Mock Safety Stitch page 11
NOTE: Make sure the Upper Looper
thread is behind the Lower Looper
thread.