Pfaff 332 Owner's Manual - Page 33

Accumulations of lint packed betweenfeedteeth. Take off needle plate and remove lint with a stiff brush. 6. Machine Works Heavily Cause: Motor belt is loose and slips, or has shrunk and causes excessive pressure an bearings. Hook raceway lacks oil or is obstructed by pieces of thread. Mechanism clogged by inferior oil. Bobbin winder working while sewing. (When a bobbin is not being filled). Snarled thread between balance wheel and bushing. Remedy: Loosen or tighten motor belt by adjusting idler. Clean and oil hook raceway. Use only Piaff sewing machine oil - never salad oil or glycerine. Stop bobbin winder. Unwind and remove thread. Thread Jamming If thread jams in the sewing hook mechanism and blocks it, proceed as follows: The thread will come out more easily if you put a few drops of oil or cleaning fluid into the hook raceway. Tighten the stop motion knob. Move the balance wheel away from you. Take the end of the thread and pull it out while rocking the balance wheel. If thread is still jammed, call your Pfaff dealer for help. Thread iamming can be avoided by following the instructions on pages 4 and 5. 32