Changing A Spool On A Threaded Machine - Pfaff Cover Style Owner's Manual

Important note on threading
The needle(s) must always be threaded last so
that the needle threads do not run under the
looper thread as seen in drawing 1, but instead
over the looper thread as depicted in drawing
2. Should this sequence not be followed, thread
breakage or missed stitches can occur.
24
If the looper threads break, you must pull the
needle threads out of the needle eye, rethread
the loopier thread and then rethread the needle
threads.

Changing a spool on a threaded machine

Cut the threads off close to the spool and re-
place with new spools. Tie together the threads
which are still in the machine with the new
threads, and pull the threads out of the needle
eyes. Raise the presser foot. Pull on the needle
threads until the knots are about 6 inches (15
cm) past the last thread guide in front of the
needles. Cut the knots off and pull the threads
through the respective needle eyes. The looper
threads can be pulled continuously past the
looper eye and placed to the left underneath
the presser foot.