JUKI AMB-289, Engineer'S Manual

Page: 61 / 177

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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 of looper rocking lever , and draw out pin
.
4. Tilt the machine head, loosen setscrew of looprer rocking lever B
, and remove looper rocking link (asm.) .
5. Loosen pin setscrews of looper rocking lever B , and draw out
pin .
6. Loosen setscrews of thrust collar .
7. Loosen setscrew of looper rocking arm , and draw out looper
rocking shaft .
Assembling the looper rocking link and the looper rocking shaft
1. Paying attention to the assembling direction of looper rocking arm
, set the arm to square block , enter looper rocking shaft to
looper rocking arm , looper rocking metal and thrust collar ,
align the front end of looper rocking arm with the front end of
looper rocking shaft , and temporarily tighten setscrew of looper
rocking arm .
2. Take the thrust of looper rocking shaft with thrust collar .
3. Paying attention to the assembling direction, enter pin to looper
rocking link and looper rocking lever B , adjust it to the flat
section, and tighten setscrews .
4. Paying attention to the assembling direction, enter looper rocking
lever B to looper rocking shaft , enter pin to looper rocking
link (asm.) and looper rocking lever , adjust it to the flat section,
and tighten setscrews .
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 of looper rocking arm . When
it is not good, loosen setscrew of looper rocking arm , and per-
form adjustment.
o Assemble so that the components
smoothly rock without looseness.
o Assemble so that the components
smoothly rock without looseness.
o Make sure that the bottom end of
the engraved marker line on the
machine bed aligns with the edge
of the lower side of slot of looper
rocking lever B
. "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 the yoke
slide." Press looper rocking lever
B
to looper rocking shaft metal
, and tighten setscrew .
o When the lateral position is
improper, sewing trouble will be
caused.
Procedures of disassembling / assembling Caution in disassembling / assembling