Service Manual
Page 11
... up in the arrow direction. and remove shuttle race tinge. Belt cover Remove belt cover by taking off two screws 0. and remove the V-belt. 9. Bobbin case 0 Remove bobbin case 0 by loosening three screws 0. 2. and remove the cover. 3. Q 7. and pull it out upward. Return the machine head. 10. Face plate 0 Remove by holding...
... up in the arrow direction. and remove shuttle race tinge. Belt cover Remove belt cover by taking off two screws 0. and remove the V-belt. 9. Bobbin case 0 Remove bobbin case 0 by loosening three screws 0. 2. and remove the cover. 3. Q 7. and pull it out upward. Return the machine head. 10. Face plate 0 Remove by holding...
Service Manual
Page 41
... Excessite shock at 'low speed. ----I operate properly. Lower thread tension bracket position Adjust lower thread tension bracket position. Bobbin presser position is not enough at stop Brake spring pressure Deceleration is wrong. Needle thread length is incorrect. "." •... position. 29 Adjust clutch cam timing. 28 Adjust brake spring 30 pressure. L Thread wiper position is wrong. needle. Thread volume Adjust bobbin presser position. _I Main tension release timing is wrong. Faulty start loser position. 28 Thread lake-up lever stroke. 33 -41 - ...
... Excessite shock at 'low speed. ----I operate properly. Lower thread tension bracket position Adjust lower thread tension bracket position. Bobbin presser position is not enough at stop Brake spring pressure Deceleration is wrong. Needle thread length is incorrect. "." •... position. 29 Adjust clutch cam timing. 28 Adjust brake spring 30 pressure. L Thread wiper position is wrong. needle. Thread volume Adjust bobbin presser position. _I Main tension release timing is wrong. Faulty start loser position. 28 Thread lake-up lever stroke. 33 -41 - ...
Service Manual
Page 42
... is bent. Thread take-up spring tension and height. 2 1 A Polish or replace delectise parts. Thread end Select thread suitable to needle. Needle hole plate or bobbin case edge has flaws. dNeedle and shuttle timing is too - course. Replace needle A L T 1 Adjust needle and teed T timing. Lower thread snaps. Upper thread tension is...
... is bent. Thread take-up spring tension and height. 2 1 A Polish or replace delectise parts. Thread end Select thread suitable to needle. Needle hole plate or bobbin case edge has flaws. dNeedle and shuttle timing is too - course. Replace needle A L T 1 Adjust needle and teed T timing. Lower thread snaps. Upper thread tension is...