JUKI LG-158, Instruction Manual

Page 1: ...No 02 40095659 INSTRUCTION MANUAL NOTE Read safety instructions carefully and understand them before using Retain this Instruction Manual for future reference LG 158 LG 158 1 ...

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Page 6: ... In addition be sure to turn OFF the power to the machine when replac ing the bobbin 7 To avoid possible accidents due to abrupt start of the machine be sure to turn OFF the power to the machine 8 Be careful of handling this product so as not to pour water or oil shock by dropping and the like since this product is a precision instrument 9 When tilting or returning the sewing machine to the home p...

Page 7: ...cal documentation and 3 To be prepared with the above technical documentation compiled in accordance with part B of Annex VII and 4 Also to conform to the RoHS Directive 2011 65 EU 5 Relevant information on which should be transmitted in response to a reasoned request by the national authorities by the electronic method or other according to the request Applied harmonized standards in particular E...

Page 8: ...HE BOBBIN CASE OPENING LEVER 8 14 HEIGHT OF THE PRESSER FOOT 9 15 INSTALLING POSITION OF THE PRESSER FOOT 9 16 ADJUSTING THE STITCH LENGTH 10 17 ADJUSTING THE HEIGHT OF THE FEED DOG 10 18 ON REVERSE SEWING 10 19 ADJUSTING THE PRESSER FOOT AND THE WALKING FOOT 11 20 ADJUSTING THE LIFTING AMOUNT OF THE PRESSER FOOT AND THE WALKING FOOT 11 21 EXCHANGING THE TIMING BELT 12 22 TIMING OF MAIN SHAFT AND ...

Page 9: ...o ISO 10821 C 6 2 ISO 3744 GR2 at 1 500 sti min Equivalent continuous emission sound pressure level LpA at the workstation A weighted value of 87 5 dB Includes KpA 2 5 dB according to ISO 10821 C 6 2 ISO 11204 GR2 at 1 500 sti min Sound power level LWA A weighted value of 96 5 dB Includes KWA 2 5 dB according to ISO 10821 C 6 2 ISO 3744 GR2 at 1 500 sti min 1 INSTALLING THE MACHINE 1 When carrying...

Page 10: ...chain Attach chain supplied with the unit to S shaped fitting which has been installed on the presser lifting lever Install S shaped fitting and chain to changeover link spring peg plate Bring down chains to respectively from the oil pan to connect to the table stand 2 INSTALLING THE THREAD STAND Assemble the thread stand device Fit it in the hole in the table Tighten locknut so that the thread st...

Page 11: ...n the face plate set screw and by placing the face plate on top lubricate the oil wick and the moving parts 3 When the machine is to be used continuously lubricate it at least twice a day 4 Finally when the machine is to be used for the first time or when it is used to sew long length material continuously be sure to lubricate it often Use DD 1 needle There are many types and size numbers of needl...

Page 12: ... shown in the figure and if the thread is twisted toward front by the left hand and is wound tight it is a right twist thread On the contrary if the thread in the right hand is twisted toward front and is wound tightly it is left twist thread Open the lever of the sewing hook insert the bobbin and knock down the lever to its original position If the bobbin thread is pulled out from the groove of t...

Page 13: ...nsion weaker Bobbin thread tension The thread tension of the bobbin thread can be adjusted by turning the thread tension screw of the bobbin case holder If the screw is tightened the tension becomes stronger and if it s loosened the tension becomes weaker Thread take up spring To adjust the strength of the thread take up spring loosen the thread take up spring shaft screw and turn the thread take ...

Page 14: ... to the machine In such cases the safety device goes into action automatically to prevent damages to the ma chine When the safety device is acting the feed and the sewing hook do not move even if the handwheel is rotated When the safety device is acting remove the cause of the defect and set the safety device to the original status by the following method 1 While pushing the push button push the a...

Page 15: ...21 2 mm 53 64 and tighten the needle bar clamping screw 11 ADJUSTING THE WALKING FOOT AND PRESSER FOOT WARNING To protect against possible personal injury due to abrupt start of the machine be sure to start the following work after turning the power off and ascertaining that the motor is at rest 3 How to match the timing of sewing hook Loosen the set screw of the large gear of the hook shaft move ...

Page 16: ... and ascertaining that the motor is at rest 1 Dismantling the sewing hook 1 Remove the presser foot walking foot throat plate feed dog and bobbin case opening lever 2 Tilt the machine and loosen the set screw of the small gear 3 Rotate the handwheel to bring the needle bar to its highest position and re move the sewing hook by pulling it upwards Note At this point be sure to see that the interlock...

Page 17: ... a wooden block of 16 mm 5 8 between the presser foot and the throat plate and in that condition tighten the set screw of the knee lifter mounting bracket 2 Remove the wooden block Maximum rising amount of the presser foot by means of the knee lifter is 16 mm 5 8 When the presser foot hits the walking foot or the needle adjust as follows 1 Loosen the pressure regulating thumb screw 2 If the presse...

Page 18: ...ched release the feed adjusting button The figure indicates the length of the stitch in mm unit 10 stitch length 10 mm 25 64 The figure on the graduation plate can be seen from the sight window even with the top cover in closed condition The maximum height of the feed dog above the throat plate is 1 2 1 4 mm 3 64 1 16 Adjust to this position by loosening the screw When the feed dog is exchanged be...

Page 19: ...n the set screw of the upper feed spring rod 2 Then rotate the handwheel toward the normal direction and firmly tighten the clamp screw 3 When the presser foot is to be raised higher than the walking foot 1 Lower the presser foot rotate the handwheel in the normal direction and when the upper surface of the presser foot and walking foot come to the same position as the upper surface of the throat ...

Page 20: ... possible personal injury due to abrupt start of the machine be sure to start the following work after turning the power off and ascertaining that the motor is at rest 23 HOW TO REMOVE THE BOBBIN CASE HOLDER WARNING To protect against possible personal injury due to abrupt start of the machine be sure to start the following work after turning the power off and ascertaining that the motor is at res...

Page 21: ... sewing speed of sewing machine is as shown in the table below Caution The effective diameter of motor pulley is obtained by subtracting 5 mm from its outside diameter The correct distance between the walking foot bar and the presser bar is 17 mm 43 64 at the place shown in the figure when the stitch length is 0 1 Set the stitch length to 0 2 Loosen the needle bar driving crank clamp screw 3 Then ...

Page 22: ... of presser foot and walking foot is too small Increase the lifting amount of presser foot and walking foot Refer to the chapter on 20 ADJUSTING THE LIFTING AMOUNT OF THE PRESSER FOOT AND THE WALKING FOOT c Due to inferior quality of the needle thread When the twist has flows and knots or constrictions are formed When old threads are used sometimes they break easily with slight pressure Exchange t...

Page 23: ...f take up spring is too weak Timing of bobbin case opening lever is not matched Finish of thread paths of all parts are bad Sewing hook is defective Make the strength of take up spring stronger Refer to the chapter on 8 THREAD TENSION Refer to the chapter on 13 ADJUSTING THE BOBBIN CASE OPENING LEVER Polish with a fine mesh paper file sand paper or by buffing Exchange the sewing hook with a new ho...

Page 24: ...gents in your area for further information when neces sary The description covered in this instruction manual is subject to change for improvement of the commodity without notice 13 09 Printed in Japan SEWING MACHINERY BUSINESS UNIT 2 11 1 TSURUMAKI TAMA SHI TOKYO 206 8551 JAPAN PHONE 81 42 357 2371 FAX 81 42 357 2380 http www juki com ...