Singer The SINGER 160 Instruction Manual 4 - Page 35
Performance, problems
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Performance problems Problem Fabric does not move Breaking needle Breaking upper thread Breaking bobbin thread Machine jamming Knocking noise Puckering Probable cause Feed dog down - - Stitch length dial on 0 - Light presser foot pressure Incorrect insertion of needle - Bent needle - - Fabric is pulled - Needle, thread and fabric do not match - Improper threading - Tight upper thread tension Needle bent - - Nicks or burrs on stitch plate opening - Tight bobbin thread tension - Improper threading Incorrect insertion of needle - - Lint or thread in shuttle - No oil - Damaged needle - Thread caught in shuttle - Thread tension(s) too tight - Presser foot pressure too tight - Needle, thread and fabric do not match Possible correction Raise feed dog - - Set dial between 1 and 4 Increase pressure - - Re-insert needle Replace needle - Do not pull fabric - - Use correct needle and thread Re-thread machine - - Loosen upper thread tension Insert new needle - - Polish of burrs or replace stitch plate Loosen bobbin thread tension - - Re-thread machine Re-insert needle - Clean shuttle - Oil - Replace needle - Clean shuttle - - Loosen tension(s) - Adjust pressure - Use correct needle and thre4d