Looper Mas. Asm - JUKI TL series Service Manual

Automatic Thread Trimming Components

1. Looper mas. asm.

Preparation
○ Remove bed cover.
❼ Bobbin case
(Center of inner hook)
Disassembly
○ 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.
2. Moving knife arm installing plate mas. asm.
Preparation
○ Remove bed cover.
○ Remove ❷ looper mas. asm..
○ Remove moving knife arm ❻ spring.
Disassembly
○ 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)
❷ Looper link holding shaft
❻ Looper
○ 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.
❷ Looper
mas.asm
❶ Moving knife link shaft A
E-ring E-4
○ 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.
❺ Looper mas. asm.
setscrew
SM5040855SN
(Washer A1731090000
E-ring E-3)
Assembly
❸ Nut (9 mm) of
❹ Moving knife arm installing plate
wire setscrew
❺ Moving knife link
❻ Moving knife arm spring
Assembly
13
– –
❸ Looper link asm.
❹ Moving knife
❶ Looper link B
arm spring
E-ring E-3
Point
○ 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.
mas. asm. set screw SM4050855SP
❽ Thread trimmer clutch
plate collar
❼ Thread trimmer clutch plate
collar setscrew
Point
○ 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.