Singer 191 D Manual
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18High Speed Straight Lockstitch Sewing \fachine | Instruction \fanua\b and Parts List 3.18 Needle to Rotating Hook Relation Adjustment Adjusting the height of the needle bar (Figure 27) Turn the handwhee\f unti\f the nee\b d\fe bar has been at the \fowest point, \foosen the setscrew ‘1’. The \fine ‘A’ on the need\fe bar ‘2’ a\fign with the bottom end of need\fe bar \fower bushing ’3’, then secure\fy tighten the setscrew ‘1’. Adjusting the position of the rotat- ing hook Loosen two rotating hook set\b screws and turn the handwhee\f un\b ti\f the \fine ‘B’ on need\fe bar a\fign with the bottom end of need\fe bar \fower bushing ‘3’. After the above adjustments steps, the rotating hook point ‘5’ a\figns with the center of need\fe ‘4’, and make sure the c\fearance between the need\fe and the rotating hook ‘5’ is 0.04~0.1 mm. Figure 27 If the clearance is too small\f the rotating hook \boints will wear out\f and too big\f it will cause the ski\b stitch. When re\blacing the \c rotating hook\f it should be using th\ce original one. Precaution
19High Speed Straight Lockstitch Sewing \fachine | Instruction \fanua\b and Parts List 3.19 Presser Bar Height Adjustment Loosen setscrew ‘1’ (Figure 28) and adjust the height of the presser bar. When the presser foot rises to the highest, the distance between the throat p\fate and the presser foot is 5.5 mm (Figure 29). Tighten the setscrew ‘1’ after ad\b justment. Figure 28 Figure 29 5,5mm
20High Speed Straight Lockstitch Sewing \fachine | Instruction \fanua\b and Parts List 3.20 Thread Take- Up Stroke Adjustment When sewing for heavy weight ma\b teria\f, the thread guides ‘1’ move to the \feft (in direction ‘A’) to increase the \fength of thread pu\f\fed out by the thread take\bup. When sewing \fight weight materia\f, the thread guides ‘1’ move to the right (in direction ‘B’) to decrease the \fength of thread pu\f\fed out by the thread take\bup. When marker \fine ‘\f’ on the thread guide ‘1’ is a\figned with the center of the screw that is standard (Figure 30). Figure 30
21High Speed Straight Lockstitch Sewing \fachine | Instruction \fanua\b and Parts List Maintenance 4 4.1 4.2 4.3 Machine Head \fleaning Lubrication Safet\b Inspection C\fean the machine periodica\f\fy with a soft and dry c\foth to remove the excess of dust on the machine head. Do not use any kind of \facquer thin\b ner to wipe the surface. If the machine was id\fe for a \fong time, \fubricate the machine accor\b ding to the instructions of topics 3.4 to 3.6. Check periodica\f\fy if a\f\f safety de\b vices are proper\fy insta\f\fed and ad\b justed. Check if a\f\f fixing and supporting screws of the machine head are adequate\fy tighten. Check if the v\bbe\ft is not excessive\fy worn and if it has the right tension. Check if there is no overheating in the e\fectrica\f motor and check if the power cord and p\fug are not dama\b ged.
22High Speed Straight Lockstitch Sewing \fachine | Instruction \fanua\b and Parts List Troubleshooting Problems Possible Causes Possible Solutions Needle break 1. Needle is installed wrong 1.Install needle correctly 2. Wrong needle ty\be or size 2.Use \bro\ber needle for fabric and thread 3. Needle is bended 3.Re\blace needle 4. Wrong relation with\c rotary hook 4.Readjust the rotary hook 5. Needle doesn’t center the needle\c hole of throat \bla\cte or \bresser foot 5. Readjust the needle\c \blate and \bresser \cfoot \bhread break 1. Low quality thread 1.Change the thread 2. Thread is thicker than needle hol\ce 2.Use \bro\ber needle for fabric and thread 3. Wrong threading 3.Rethreaded the machine correctly 4. Thread tension is t\coo strong 4.Readjust the thread\c tension nut 5. Needle is installed wrong 5.Install needle correctly 6. Thread stand installed wrong 6.Install thread stand correctly 7. Thread tension disc\f\c thread guide\f need\cle\f hook \boint and needle \blate ar\ce burred 7. Grind off\f \bolish or re\blace \cby a new \barts 8. Wrong relation with\c rotary hook 8.Readjust needle and\c hook \boint relation\c Skip stitches 1. Wrong relation of ne\cedle and hook \boint 1.Readjust needle and\c hook \boint 2. Wrong threading 2.Rethread the machine correctly 3. Needle is installed wrong 3.Installed needle correctly 4. Inadequate thread \ctension 4.Readjust the thread\c tension nut 5. Hook \boint is damage\cd 5.Re\blace by a new \bart 6. Needle is bended 6.Re\blace needle Loosen stitches 1. Wrong threading 1.Rethread the machine correctly 2. Thread is thicker than needle hol\ce 2.Use \bro\ber needle for fabric and thread 3. Inadequate thread \ctension 3.Readjust the thread\c tension nut 4. Wrong setting of needle and \chook \boint 4.Readjust needle and\c hook \boint Wrinkled stitches 1. Thread tension is t\coo strong 1. Readjust the thread\c tension nut 2. Take-u\b s\bring is too \cstrong 2. Readjust the take-u\b s\bring 3. Inadequate \bressure\c of \bresser foot 3. Readjust the \bresser\c foot \bressure 4. Inadequate height \cof feed dog 4. Readjust the feed dog 5. Needle is too thick 5. Use \bro\ber needle for fabric and thread
23High Speed Straight Lockstitch Sewing \fachine | Instruction \fanua\b and Parts List Parts List
24High Speed Straight Lockstitch Sewing \fachine | Instruction \fanua\b and Parts List 6.1 Frame and \fover \fomponents 1 10101034 Face plate 111111 2 10122096 Face plate gasket 111111 3 101S11010 Screw S\f1/8x44 L=4 111111 4 10112024 Arm oil shield asse\nmbly 111111 5 10122005 Rubber plug 222222 No. Part No. Description Qty. 20 20C 3030C 7070C
No.Part No. Description Qty. 20 20C 3030C 7070C 25High Speed Straight Lockstitch Sewing \fachine | Instruction \fanua\b and Parts List 6 10122003 Rubber plug 111111 7 101S11001 Screw S\f3/16x28 L=9 888888 8 10112063 Side plate 111111 9 10122097 Side plate gasket 111111 10 10122006 Rubber plug 111111 11 10122007 Rubber plug 111111 12 100017 Frame 111111 13 10113003 \bwo-hole thread eye\nlet guide 111111 14 J900112-001 Singer "S" cameo 111111 15 101S11004 Screw S\f3/16 x 28 L=6 222222 17 10113004 Right arm thread gu\nide 111111 18 101S11007 Screw S\f11/64 x 40 L=6 111111 19 1011301500 \bhread tension regul\nator assembly 111100 400597 \bhread tension regul\nator assembly 000011 20 101S16001 \bension adjusting nut\n 111111 21 10112007 \bension disk stopper\n 111111 22 10127002 \bension spring 110000 10127017 \bension spring 001111 23 10112006 \bension disk holder 111111 24 10112005 \bhread tension disk 222222 25 101S30002 \bension post 111111 26 10127001 \bhread take-up spring 111111 27 10103011 \bension post socket 111111 28 101S15005 Screw S\f9/64x40 L=5.5\n 111111 29 101S15006 Screw S\f15/64x28 L=7 111111 30 10126002 \bension releasing pin\n 111111 31 10115001 \bhroat plate 110000 10115005 \bhroat plate 001100 10115014 \bhroat plate 000011 32 101S17002 Screw S\f11/64 x 40 L=8.5 222222 33 10113005 Left arm thread guide 111111 34 101S11007 Screw S\f11/64x40 L=6 111111 35 10122003 Rubber plug 222222 36 101S11001 Screw S\f3/16x28 L=9 333333 37 1011500200 Slide plate assembl\ny 111111 38 10115002 Slide plate 111111 39 10127009 Slide plate spring 111111 40 101S11019 Screw S\f3/32x56 L=1.9 222222 41 101S12001 Screw stud 444444 42 10112002 Scale base plate 111111 43 101S11002 Screw S\f11/64 x 40 L=5 222222 44 J900191-xxx \fodel plate 111111 45 R03001 \fodel plate rivet 222222 46 10112062 \bhread take-up lever cover 111100 10112064 \bhread take-up lever cover 00 0011 47 11237003 Safety label 111111 48 1011300700 \bhread guide rod as\nsembly 111111 49 10112008 \bhread guide rod 111111 50 10112009 \bension disk 222222 51 10127004 \bension spring 111111 52 101S30003 Hinge screw 111111 53 J900112-002 Singer logo resin p\nlate (front) 111111 54 J900112-004 Singer logo resin p\nlate (back) 111111 6.1 Frame and \fover \fomponents
26High Speed Straight Lockstitch Sewing \fachine | Instruction \fanua\b and Parts List 6.2 Arm Shaft and Thread Take-Up Lever \fomponents
No.Part No. Description Qty. 20 20C 3030C 7070C 27High Speed Straight Lockstitch Sewing \fachine | Instruction \fanua\b and Parts List 1 10126001 \bhread take-up crank shaft 111111 2 101S15001 Screw S\f15/64 x 28 L=10.5 111111 3 101S3001 Screw 111111 4 10105001 \bhread take-up lever link 110000 10105006 \bhread take-up lever link 001100 1223800300 \bhread take-up lever link ass\nembly 000011 6 10124001 Needle bearing 222222 7 1011000100 Needle bar crank 110000 1011000400 Needle bar crank 001100 1221000100 Needle bar crank 000011 8 10105002 Needle bar crank ro\nd 111111 9 101S15007 Screw S\f9/64 x 40 L=4\n.8 111111 10 101S15004 Screw S\f9/32 x 28 L=\n16 111111 11 10104001 Counter weight 111111 12 101S15002 Screw S\f1/4 x40 L=6 222222 13 10122010 Rubber ring 111111 14 101S11003 Screw S\f9/32 x 28 L=\n6 111111 15 10110003 Feed drive eccentric cam 111100 400058 Feed drive eccentric cam 000011 16 101S11013 Screw S\fI/4 x 40 L=11 222222 17 10103001 Arm shaft bushing (rear) 111111 18 10122008 Oil seal 222222 19 H03002 Snap ring 111111 20 10108001 \bhrust collar 111111 21 101S15007 Screw S\f1/4 x 40 L=6\n 222222 22 10103004 Arm shaft bushing (front) 111111 23 10112003 Oil adjusting colla\nr 111111 24 10103003 Arm shaft bushing (middle) 111111 25 101S15006 Screw 111111 26 10112017 \bhrust collar 111111 27 10135007 Hand wheel 111111 28 101S15008 Screw S\f15/64 x 28 L=15 222222 29 10102001 Arm shaft 111111 30 10122012 Roller felt 111111 31 101S11005 Oil amount adjusting\n pin 1111116.2 Arm Shaft and Thread Take-Up Lever \fomponents