JUKI AMB-289 Engineer's Manual page 57

Procedures of disassembling / assembling
Disassembling the looper rocking link and the looper rocking shaft
1. Remove the rear cover.
2. Remove the relay circuit board installing plate. (Connector may not be
removed. However, remove it when it is hard to perform the work.)
3. Loosen pin setscrews 2 of looper rocking lever 1, and draw out pin 3.
4. Tilt the machine head, loosen setscrew 5 of looprer rocking lever B 4,
and remove looper rocking link (asm.) 6.
5. Loosen pin setscrews 7 of looper rocking lever B 4, and draw out pin 8.
6. Loosen setscrews !0 of thrust collar 9.
7. Loosen setscrew !2 of looper rocking arm !1 , and draw out looper rocking
shaft !3 .
Assembling the looper rocking link and the looper rocking shaft
1. Paying attention to the assembling direction of looper rocking arm !1 , set
the arm to square block !4 , enter looper rocking shaft !3 to looper rocking
arm !1 , looper rocking metal !5 and thrust collar 9, align the front end of
looper rocking arm !1 with the front end of looper rocking shaft !3 , and
temporarily tighten setscrew !2 of looper rocking arm !1 .
2. Take the thrust of looper rocking shaft !3 with thrust collar 9.
3. Paying attention to the assembling direction, enter pin 8 to looper rocking
link 6 and looper rocking lever B 4, adjust it to the flat section, and
tighten setscrews 7.
4. Paying attention to the assembling direction, enter looper rocking lever B
4 to looper rocking shaft !3 , enter pin 3 to looper rocking link (asm.) 6
and looper rocking lever 1, adjust it to the flat section, and tighten
setscrews 2.
5. Attach the needle, and align the needle with the engraved marker line on
the machine bed when the needle bar is in the lowest position (lateral
direction).
6. Raise the machine head, and confirm again adjustment of step 5. When it
is good, tighten setscrew !2 of looper rocking arm !1 . When it is not good,
loosen setscrew !2 of looper rocking arm !1 , and perform adjustment.
Caution in disassembling / assembling
™ Assemble so that the components
™ Assemble so thart the components
™ Make sure that the bottom end of the
™ When the lateral position is improper,
− 53 −
smoothly rock without looseness.
smoothly rock without looseness.
engraved marker line on the machine bed
aligns with the edge of the lower side of
slot of looper rocking lever B 4. "Refer
to (4) Disassembling and assembling of
the needle throwing motor and the needle
bar rocking arm."
Tilt the machine head, adjust the lateral
position of the needle and the yoke
slide. "Refer to (4) Adjusting the position
of thge yoke slide." Press looper rocking
lever B 4 to looper rocking shaft metal
!6 , and tighten setscrew 5.
sewing trouble will be caused.