Pfaff 76 Owner's Manual - Page 41

Trouble Shooting When operated properly, your sewing ma chine will hardly develop any trouble. Please remember to restore the normal set ting after you have completed your sewing job (buttonhole sewing or darning, for in stance) by switching the machine back to straight stitching, flicking the needle posi tion lever to its central position, raising the machine feed and setting the stitch length control on "2. If trouble should occur, check the foIIowing • The needle must not be damaged and must be inserted correctly. • Selectthe correct needle and thread from the Needle and Thread Chart. • Check whether the needle has been threaded correctly. • Use only high-grade machine thread or sewing silk. • Check to see that the bobbin case has been inserted correctly. • Both tensions must be balanced correctly. •. Don't force the feeding motion, merely guide the material lightly. • Clean and oil the machine as instructed. • Make sure there are no pieces of thread wedged between the tension discs. To remove them, pull a narrow fabric strip between the tension discs. • The Pfaff rotary hook will not normally jam, even if the machine should be handled improperly. If thread should happen to jam in the hook raceway, It is sufficient to put a drop of oil into the raceway, jerk the balance wheel back and then rock it back and forth, without applying force. 39