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BELT TENSION

CORRECT SETTING

To check the belt tension, press the belt in the middle of the span lightly with your finger
(approx. 300g). The belt should depress 5 to 6 mm (13/64” to 15/64”).

TO ADJUST

Remove the belt cover (Refer to page 6.)

Loosen the 2 set screws (B), then tighten them slightly.
Adjust the belt pressure, then tighten both set screws firmly.

Turn the hand wheel a few rotation and check the belt tension again.

Attach the belt cover.

www.promelectroavtomat.ru

Содержание myLock 134D

Страница 1: ...SERVICING MANUAL MODEL 134D www promelectroavtomat ru...

Страница 2: ...es and lower looper needle guards 19 20 Clearance between needle and the fixed needle guards 21 Lower looper timing 22 Upper looper position 23 Upper lower loopers timing 24 Clearance between loopers...

Страница 3: ...Light bulb is burned out 1 Not enough oil 2 Something is caught inside the machine 3 Main shaft is loose 4 Knives are dull 5 Needles are dull Use correct power source Turn on the snitch Plug the conn...

Страница 4: ...ESULTS If stitching result is poor do the following procedures 1 Correct needle is being used 2 Needle and thread weights are suitable to the cloth being sewn 3 Is the machine threaded properly 4 Chec...

Страница 5: ...d upper looper 5 Needle bar height is not correct 6 Timing of lower looper is not correct 7 Position of upper looper is not correct 8 Timing relationship of the upper and lower loopers is not correct...

Страница 6: ...guide is off 2 Needle plate is not correct one for current sewing operation 3 Feed dog liming is off 4 Presser foot pressure is too strong 5 Differential feed mechanism is not functioning correctly T...

Страница 7: ...en 4 Lower knife is worn or broken 5 Presser foot pressure is too weak Lower the presser foot Standard length is 2 5 to 3 5 mm Adjust the pressure with the adjusting screw Remove the lint from the fee...

Страница 8: ...Open the looper cover D 3 Loosen the two set screw E and F 4 Pull the top end G and back end H at the same time TO ATTACH 5 While inserting the three projections I J K Push the belt cover L against t...

Страница 9: ...sher E is thicker than the other three washers 2 Remove the 2 set screws F 3 Remove the machine base G TO ATTACH 4 Attach the machine base G and tighten the 2 setscrews F 5 Attach the washers D E base...

Страница 10: ...setscrews B and washers C 3 Remove the side cover A TO ATTACH 4 Attach the side cover A to the setting plate D temporarily with two screws B and washers C 5 Adjust the opening and closing function of...

Страница 11: ...A and remove the looper cover unit B TO ATTACH 3 Attach the looper cover unit B to the machine body D temporarily with 2 set screws A 4 Adjust the opening and closing functions of looper cover B 5 Tig...

Страница 12: ...r unit 2 Loosen the 2 setscrews A 3 Remove the setscrews B 4 Loosen the setscrew C to remove the front panel unit D TO ATTACH 5 Attach the front panel unit D by fastening the screws A B and C 6 Attach...

Страница 13: ...GAUGE FOR SERVICING Distance gauge Thickness gauge Needle gauge No 8289 No 787 G03 NO 787 G02 Lower looper height NO 787 G01 11 www promelectroavtomat ru...

Страница 14: ...Use needle HA 1 SP size 11 or 14 when using this gauge A for needle bar height B for presser bar height C for feed dog height position of knives D for upper looper position E for feed timing Thickness...

Страница 15: ...the needle bar B at the highest position 3 Loosen the set screw A and adjust the height by using the part C of the gauge No 8289 Tighten the set screw A after the adjustment is done Note Be careful n...

Страница 16: ...te Refer to page 6 2 Remove the set screw A to move the lamp socket unit E 3 Raise the presser bar lifter D and loosen the set screw B Then adjust the presser bar height by using the part G of the gau...

Страница 17: ...by turning the hand wheel 3 Loosen the 4 main sub feed dog screws A B 4 Push the main feed dog F straight upward D and adjust the distance between the surface of needle plate E and bottom of presser f...

Страница 18: ...r foot and move the needle downward until the tip of the right needle comes 2 mm 5 64 above the needle plate The part F of the gauge No 8289 is 2mm 3 Lower the presser foot and loosen the 2 screws C a...

Страница 19: ...ve cam E to the direction of A when the upper knife timing is delayed turn the upper knife drive cam E to the direction of B when the upper knife timing is advanced 3 Tighten the 2 set screws C firmly...

Страница 20: ...the leftmost position 5 Set the gauge No 787 G01 D to the lower looper shaft C 6 Turn the hand wheel to set the lower looper B at the rightmost position 7 Loosen set screw A and move the lower looper...

Страница 21: ...needle guard I toward you to get clearance between the front needle guard I and the needle G 4 In this condition the clearance between the right needle G and lower looper P should be 0 to 0 05 mm S If...

Страница 22: ...20 www promelectroavtomat ru...

Страница 23: ...n the size 14 needles J and the lower looper P to 0 to 0 05 mm H Tighten hexagon socket screws A Note No need to adjust the position of rear needle guard K 11 Check the lower looper timing Refer to pa...

Страница 24: ...and needle plate 2 Bring the needle to the lowest position 3 Loosen set screw C Adjust the fixed needle guard B by moving it back and forth The clearance between the needle A and the fixed needle gua...

Страница 25: ...e Gauge 787 G03 Then turn hand wheel toward you until it touches the needle bar lower bushing L as shown in B 6 In this condition loosen the hexagon bolt F just enough to move the lower looper driving...

Страница 26: ...t A and adjust the distance between the upper looper shaft guide B and bottom of upper looper C by using the part I of the Gauge 8289 The distance should be 1 6 to 1 8 mm 1 16 to 9 128 when the upper...

Страница 27: ...the upper looper drive cam J to the direction of D if the timing of upper looper is advanced as shown in B E if the timing of upper looper is delayed as shown in C The allowance is 1 mm 5 128 from the...

Страница 28: ...edle plate 2 Turn the hand wheel toward you with your hand to bring the loopers as shown in A 3 Loosen the set screw F and adjust the clearance by moving the upper looper D to the back or front as sho...

Страница 29: ...e right TO ADJUST 1 Turn the hand wheel toward you with your hand to bring the needle just behind the upper looper A in downward travel 2 Loosen the set screw C and adjust the clearance between the bo...

Страница 30: ...oceeding this adjustment check the upper knife timing Refer to page 17 2 Loosen the 2 set screws D and adjust the lower knife position so that the top G of the lower knife is leveled with the surface...

Страница 31: ...it will touch the metal of the arm the feed dog or the feed dog platform LOWER LOOPER THREAD GUIDE B Loosen set screw D on lower looper thread guide B Align lower looper thread guide B with the slit H...

Страница 32: ...l G at 3 and the differential feed dial H at 1 0 3 Adjust the difference of the amount of movement between main feed dog D and sub feed dog E If the amount of movement K of sub feed dog E is larger th...

Страница 33: ...e between the main and sub feed dogs Check if the both front ends of main feed bar and sub feed dogs are leveled If the distance between the front end of the sub feed dog and that of main feed dog is...

Страница 34: ...unit Refer to page 10 2 Set the stitch length dial E at 3 and the differential feed dial D at 1 0 3 If actual stitch length F is longer than 3 0 mm 8 64 turn the adjust screw C to the direction of A I...

Страница 35: ...Remove the belt from the hand wheel pulley C 3 From the bottom of the machine loosen set screw A on the main shaft ring B Slide the ring B to reduce the play on the main shaft D Tighten the set screw...

Страница 36: ...e belt should depress 5 to 6 mm 13 64 to 15 64 TO ADJUST 1 Remove the belt cover Refer to page 6 2 Loosen the 2 set screws B then tighten them slightly Adjust the belt pressure then tighten both set s...

Страница 37: ...ut the cord connectors A B C D To attach 3 Insert the cord connectors A B C D as shown below Connectors A Blue for motor B Brown for motor C Brown for lamp socket D Blue for lamp socket 4 Attach the m...

Страница 38: ...e the face plate Refer to page 6 2 Push the light bulb A up and turn the bulb counter clockwise B to remove it 3 Put the new bulb in by pushing it up and turning it clockwise C 4 Attach the face plate...

Страница 39: ...few drops of fine quality sewing machine oil to the parts indicated with arrows A B C D E F It is recommended to apply oil once a week in normal use once in ten hours in continuous use 37 www promele...

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