JUKI TL Series, Service Manual

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 13 

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Automatic Thread Trimming Components

1.  Looper mas. asm.

Preparation

○

 Remove bed cover.

2. Moving knife arm installing plate mas. asm.

Preparation

○

 Remove bed cover.

○

 Remove 

❷

 looper mas. asm..

○

 Remove moving knife arm 

❻

 spring.

❸

 Nut (9 mm) of 

wire setscrew

❶

 Moving knife link shaft A

  E-ring E-4

❺

 Moving knife link

❹

 Moving knife arm installing plate 

mas. asm. set screw  SM4050855SP

❻

 Moving knife arm spring

❺

 Looper mas. asm.

  setscrew

 SM5040855SN

❸

 Looper link asm.

❷

 Looper link holding shaft 

(Washer A1731090000    

E-ring E-3)

❹

 Moving knife 

arm spring

❶

 Looper link B 

E-ring E-3

❼

 Bobbin case

  (Center of inner hook)

❻

 Looper

❷

 Looper 

mas.asm

❽

 Thread trimmer clutch 

plate collar

❼

 Thread trimmer clutch plate 

collar setscrew

Disassembly

Assembly

Point

○

 Remove 

❶

 E-ring.

○

  Remove E-ring and washer of 

❷

.

○

  Remove looper link asm of 

❸

.

○

 Remove moving knife arm spring 

of 

❹

.

○

 Remove setscrews of 

❺

 and re-

move looper mas. asm. 

○

  Attach looper mas. asm. and 

tighten 

❺

 setscrews. (Adjust 

looper link B shaft to hole.)

○

  Hook moving knife arm 

❹

 spring.

○

  Set looper link and attach E-ring, 

washer, etc.

○

 Place 

❻

 looper in the center 

❼

 of inner hook and securely 

tighten 

❺

.

 See item 4-2 on page 28 for 

adjustment of looper moving 
amount.

Disassembly

Assembly

Point

○

 Remove 

❶

 E-ring. 

 Do not remove 

❺

 moving knife link. 

(Remove together with moving knife 
arm installing plate.)

○

 Remove 

❸

 nut on the left side only.

○

  Remove thread trimmer clutch plate 

❼

 collar setscrew and 

❽

 thread 

trimmer clutch plate collar.

○

  Remove two 

❹

 screws and remove 

installing plate mas. asm.

 At this time, simultaneously remove 

moving knife link.

(  To prevent moving knife link from 
warping)

○

  Attach moving knife arm installing 

plate mas. asm.

Note : See the point on the right side.

○

  Temporarily tighten 

❹

 setscrews.

○

 Attach 

❶

 E-ring of link shaft.

○

  Temporarily tighten 

❷

 looper mas. 

asm..

○

 Attach 

❻

 moving knife arm spring.

○

  Determine position of moving knife 

and securely tighten 

❹

.

Note : Refer to assembling of moving 

knife and looper mas. asm.

○

 Set 

❶

 moving knife link and 

wire 

❸

 setscrew.

○

  Position of moving knife

  Remove hook and see from 

the reverse side of bed. 

  (See item 1 on page 24.)

○

  See item 5 on page 28 for 

adjustment of 

❸

 nut of wire.