Singer 4452 - Manuals

2-8 Front cover - Remove the screw (r) which deeply inside the machine. (13) - Loosen the screw (s) about 3mm. (14) - Remove the pattern select dial (t, u) and remove front cover following direction of arrow. (15) u Downloaded from www.Manualslib.com manuals search engine

3. Adjusting methods of each part 3-1 Play of arm shaft - Remove the face plate, arm top cover. - Loosen the screws (a, b) of arm shaft collar (d). (1) - Pull the hand wheel to the right. (2) - Push the arm shaft collar (d) to right tightly against arm shaft bushing (c), and then fasten and secure t...

 3-3 Needle drop position adjustment - Remove the face plate. - Set the pattern selector dial to " " or " ". Turn the stitch width dial to "0". - L o o s e n t h e s c r e w ( a ) o f n e e d l e b a r supporter. (1) - Turn needle bar supporter (b) forward / backward to adju...

3-4 Height of presser foot - Remove the face plate and lift up presser bar lifter lever (a). (1) - Loosen the screw (b) of presser bar bracket. (2) - Place the gauge (c) (6.0~6.2mm) on top of needle plate. (3) - Pull down the presser bar lifter lever so bottom of presser foot and top surface of gaug...

 3-5 Needle flow at maximum zigzag width - Remove the face plate, back cover and front cover. - Set the pattern selector dial to " ". Turn the stitch width dial to "6". - Set the needle bar at its lowest point when it swings to left. Turn hand wheel to move the needle bar upward. T...

 3-6 Needle center position adjustment - Remove the face plate. - Set the pattern selector dial to " " or " ". Turn the stitch width dial to "0". - Loosen the screw (a) of needle bar driving rod pin (b). (1) - Adjust the needle bar driving rod pin (b) position, clockwise ne...

 3-7 Needle position on zigzag - Remove the face plate, back cover and front cover. - Set the pattern selector dial to " ". Turn the stitch width dial to "6". Set the needle position dial to middle. - Adjust the needle by turning screw (a) of zigzag regulator crank complete clockwi...

 3-8 Automatic needle threader adjustment - Remove the face plate and turn hand wheel to raise needle bar to its highest position. - Loosen the screw (a) of the threader stopper (b). (1) - M o v e t h e s t o p p e r ( b ) u p w a r d a n d t h e threader hook will become higher. Move the stopper ...

 3-9 Adjustment of feed rock shaft and feed lifting rock cam - Remove the cord reel cover and free arm cover. - Turn the hand wheel to make the needle at its lowest point. - Check if the feed lifting rock cam (a) and the screw (b) of feed rock cam (c) are parallel. - I f t h e s c r e w o f f e e ...

 3-10 Height of needle bar - Remove the needle plate. - Set the pattern selector dial to " " or " ". Turn the stitch width dial to "0". - Remove the screws of rotary hook plate (a, b) and rotary hook plate, and take out the shuttle hook (c). (1) - Set the needle bar at its ...

 c b a 3-11 Timing of needle and hook - Remove the face plate. - Set the pattern selector dial to " " . Turn the stitch width dial to "6". - Set the needle bar at its lowest point. Place a clamp (a) around the needle bar, slightly tighten its screw (c). (1) - Place a 3.5mm gauge (b)...

 3-13 Play between shuttle driver shaft gear and lower shaft gear - Remove the free arm cover and needle plate. - Take off the shuttle hook. - Loosen three set screws (a, b, c) of the lower shaft gear (d) and move the lower shaft gear to right or left against axial direction. (But the lower shaft ...

 3-14 Play of shuttle driver shaft - Remove the needle plate. - There are 2 gauges (a, b) for testing the play of shuttle driver shaft. (1) - When you turn the hand wheel counter- clockwise, the shuttle hook (c) will move to rotary hook plate (d), and generate the play between the shuttle hook and ...

 3-16 Position of feed-dog in relation to the needle plate (left to right) - Remove the cord reel cover and free arm cover. - Loosen the screw (e) of the feed crank shaft (d) that is on the right side. (1) - Loosen the screw (b) of the feed crank shaft (c) that is on the left side. (1) - Adjust th...

 3-17 Upper thread tension adjustment - Set the dial tension (a) to "4". (1) - Use a dial tension gauge (150g) (b) to take measurement. (1) - Put dial tension thread into gauge's hook and pull, the standard range should be 70~80g. - Remove the face plate, back cover, and front cover. - Adj...

 3-18 Shuttle hook tension adjustment - Remove the needle plate. - Use a dial tension gauge (50g) (a) to take measurement. (1) - Put dial tension thread into shuttle hook (b)(the same way as inserting the bobbin) and pull it out, the standard range should be 10~14g. (1) - Adjust the screw (c) of s...

 3-19 Motor belt tension - Remove the back cover, front cover and test tension of motor belt using belt tension gauge (a). Its standard measurement should be 100g. (1) - Adjusting the belt adjusting plate (b) to regulate the improper belt's tension. The way to adjust is as following: Loosen the sc...

 3-20 Drop point of needle - Set pattern selector dial to " ". - Place a piece of blank paper on top of the needle plate and use presser foot to secure paper by pressing presser bar lifter lever down. - A d j u s t t h e s p e e d l i m i t i n g a d j u s t m e n t lever to the slow speed...

 3-22 B u t t o n h o l e u p p e r a n d l o w e r stitching problem - Remove the back cover. - Set the pattern selector dial to " " (only for 4411/5511). - Set the pattern selector dial to " ". - Set the stitch length dial at "0.5" to "1". - While buttonhole upper ...

 3-23 Bobbin winding problem - Place empty bobbin on spindle and push it to the right. - Put the thread into the spool rod, and put the spool rod cover on it. - Lead thread from spool to back side of thread guide (a) by following the indication. - W i n d t h r e a d c l o c k w i s e a r o u n d ...