Pfaff 72 Owner's Manual - Page 24

Trouble Shooting 1. Machine Skips Stitches Cause: Needle incorrectly inserted. Wrong needle. Needle bent, Machine threaded improperly. Needle too fine or too thick for the thread. 2. Needle Thread Breaks Cause: The above mentioned may cause thread breakage. Thread tension too tight. Poor or knotty thread used. Hook raceway is jammed with thread or needs oiling. Burrs or sharp edges on needle plate slot. Remedy: Push needle up as far as it will go and be sure that the long groove faces toward you, and flat side of shank away from you. Choose the correct needle from chart on page 12. (For ordinary sewing, use System 130 R needles.) Insert new needle. Check and correct threading as instructed on pages 14 and 15. Use correct needle and thread (see chart an page 12.) Remedy: See remedies listed under 1. above. Adjust tensions as instructed. Use good quality threads only. Clean and oil hook raceway. Polish needle plate slot with fine emery cloth. 25