Summary of 2118
Page 1
Models 2149sx, 2149, cj24, 2118s, 2118, 2139s & cj14 service manual.
Page 2: Contents
Contents what to do when ............................................................................................ 1~3 service access face cover ...................................................................................... 4 front cover ......................................................
Page 3: What to Do When
1 what to do when condition cause how to fix reference 1. Skipping 1. Needle is not inserted insert the needle properly. Stitches properly. 2. Needle is bent or worn. Change the needle. 3. Incorrectly threaded rethread. 4. Needle or thread are use the recommended inappropriate for sewing needle and ...
Page 4
2 condition cause how to fix reference 3. Breaking 1. Initial sewing speed is start with medium speed. Upper too fast. Thread 2. Thread path is use the proper thread incorrect. Path. 3. Needle is bent or dull. Replace with a new needle. 4. Upper thread tension is adjust upper thread p.7 too strong. ...
Page 5
3 condition cause how to fix reference 6. Noisy 1. Backlash between see mechanical p.13 operation shuttle hook gear and adjustment “clearance lower shaft gear is too between needle and hook great. (no.2)”. 2. Lower shaft gear is eliminate the looseness. Loose. 3. Inappropriate belt see mechanical p....
Page 6: Service Access
4 service access face cover 1. Remove the face cover by removing the setscrew (a). (a) cap.
Page 7: Service Access
5 service access front cover to remove 1. Loosen the set screws (a), (b),and (c), and then, remove the front cover by removing the set screws (d) ,(e),(f),(g),(h),(i)and (j). Note: unhook the tab (l) from the rear cover when removing the front cover. To attach 2. Follow the above procedure in revers...
Page 8: Service Access
6 service access rear cover to remove 1. Remove the face cover and front cover. (see page 8, 9) 2. Loosen the setscrews (a), (b) and (c), and remove setscrews (d), (e) and (f). 3. Pull up the spool pins. Remove the machine socket. Remove the rear cover clearing the presser foot lifter from the slit ...
Page 9: Mechanical Adjustment
7 mechanical adjustment top tension to check: the standard upper thread tension should be 65 - 95g when pulling the thread (cotton thread #50) in the direction of (b) with setting the tension dial at “3”. (make sure the foot should be lowered.) if the tension is out of the standard range, adjust it ...
Page 10: Mechanical Adjustment
8 mechanical adjustment bobbin tension to check: set the bobbin in the bobbin case and pass the thread (cotton #50) through the tension spring. The bobbin thread tension should be 45 - 55g when pulling the thread in the direction of (b). If the tension is out of the range, adjust it as follows: adju...
Page 11: Mechanical Adjustment
9 mechanical adjustment presser bar height and alignment to check: 1. Raise the presser foot lever (a). 2. The distance between the presser foot (d) and the needle plate (e) should be 6.0mm (0.24"). Adjustment procedure: 1. Remove the face plate. (see page 4.) 2. Remove the screw (b) and take the la...
Page 12: Mechanical Adjustment
10 mechanical adjustment needle swing to check: adjust the needle swing according to the following procedure, if the needle bar starts moving sideways while the needle is in the fabric at sewing the zigzag pattern (with maximum zigzag width). Adjustment procedure: 1. Set the pattern selector dial wi...
Page 13: Mechanical Adjustment
11 mechanical adjustment needle drop to check: when the needle swings in maximum zigzag width, the distance between the both ends of needle hole on the needle plate and the needle drop positions should be equal. If not, make an adjustment as follows: adjustment procedure: 1. Remove the face cover. (...
Page 14: Mechanical Adjustment
12 mechanical adjustment clearance between needle and hook (no.1) to check: the clearance between needle and shuttle race should be –0.05 –+0.10mm. If not, make an adjustment as follows: adjustment procedure: 1. Remove the face cover. (see page 4.) 2. Set the pattern select dial " ". Model 2149sx, 2...
Page 15: Mechanical Adjustment
13 mechanical adjustment clearance between needle and hook (no.2) to check: use this adjustment no.2 when adjustment no.1 can not be used. The clearance between needle and shuttle race should be –0.05 - +0.10mm. Adjustment procedure: 1. Set the pattern selector dial at “ ”. Model 2149sx, 2149, cj24 ...
Page 16: Mechanical Adjustment
14 mechanical adjustment feed dog height to check: 1. Lower the presser foot. 2. Turn the handwheel toward you until the needle bar comes to the feed dog above the needle plate should be 0.75–0.90 mm. If it is not in the range, adjust as follows. Adjustment procedure: 1. Open the shuttle cover. 2. L...
Page 17: Mechanical Adjustment
15 mechanical adjustment needle bar height to check: when the tip of shuttle hook meets the left side of the needle in ascending travel of the needle from its left and lowest position, the distance between the top of the needle eye and the tip of the shuttle hook should be in the range of 2.9-3.5 mm...
Page 18: Mechanical Adjustment
16 mechanical adjustment needle timing to shuttle to check: the height of the needle point from its lowest point of travel should be in the range of 1.45-1.95 mm when the tip of the shuttle hook just meets the left side of the needle at the left needle position. Adjustment procedure: 1. Set the patt...
Page 19: Mechanical Adjustment
17 mechanical adjustment distorted pattern (model 2149sx, 2149, cj24) to check: if the stretch stitch patterns are distorted with setting the stitch length control at “ s.S. ”. (in case of being a difference between forward feeding and backward feeding during stretch stitch patterns), make an adjust...
Page 20: Mechanical Adjustment
18 mechanical adjustment buttonhole feed balance to check: when sewing buttonhole, the stitches on each side of buttonhole should be the same stitch density. The range of 9-12 stitches in the right side row “backward feeding” against 10 stitches in the left side row “forward feeding” is considered a...
Page 21: Mechanical Adjustment
19 mechanical adjustment bartack feed of buttonhole (model 2149sx, 2149, cj24) to check: if the material is feed forward or backward when sewing bartack on buttonhole, make an adjustment as follows: adjustment procedure: 1. Set the pattern selector control at “ ” width selector dial " 5 " and the st...
Page 22: Mechanical Adjustment
20 mechanical adjustment bartack feed of buttonhole (model 2118s, 2118, 2139s, cj14) to check: if the material is feed forward or backward when sewing bartack on buttonhole, make an adjustment as follows: adjustment procedure: 1. Set the pattern selector control at “ ” and the stitch length control ...
Page 23: Mechanical Adjustment
21 mechanical adjustment buttunhole function (model 2149sx, 2149, cj24) to check: bottonholes should be about 3mm longer than the length set by the r foot. If this length cannot be obtained, then check and adjust as follows: adjustment procedure: 1. Remove the face cover. (see page 5.) 2. Turn the a...
Page 24: Mechanical Adjustment
22 0.3mm setscrew(a) pattern selector cam zz cam adjusting plate releas arm release arm mechanical adjustment disengagement of cam follower to check: too narrow clearance between the cam follower and the top convex of zigzag cam may often cause difficulty in turning of the pattern selector dial, or ...
Page 25: Mechanical Adjustment
23 300g load deflection 7–9 mm (a) (b) mechanical adjustment motor belt tension to check: 1. If the motor belt tension is too tight or too loose, it can cause a belt noise: if the tension is too tight, it can cause the machine to run slowly and the motor to overload; if the tension is too loose; it ...
Page 26: Wiring
24 wiring 1. Wiring for machine socket unit m : motor l : lamp ridge ridge l m l m m : motor l : lamp (for 110~120v) (for 220~240v).
Page 27: Oiling
25 oiling factory lubricated parts will provide years of household sewing without routine oiling. However, whenever the machine is being serviced, check to see if any parts need to be lubricated. Oil use good quality sewing machine oil at the points (a, b, c, d, e) indicated by black arrows. Grease ...