JUKI LH-3500A Series Instruction Manual page 28

[A type and F type]
(1) When you want to change the stroke of the thread take-up spring
❹
❻
1) Stroke of thread take-up spring ❶ on the right is adjustable by moving thread tension No. 2 asm. ❸ to
the left or right after loosening thread tension No. 2 setscrew ❷ .
2) Stroke of thread take-up spring ❹ on the left is adjustable by moving thread tension No. 2 asm. ❻ to the
left or right after loosening thread tension No. 2 setscrew ❺ .
3) Move thread tension No. 2 asm. ❸ and ❻ to the right to increase or to the left to decrease the stroke of
the thread take-up spring.
When adjusting the stroke of thread take-up springs ❶ and ❹ , thread release pins ❼ and ❽
should not come in contact with disk release plate ❾ .
In addition, for LH-3528A, 3528A-7 make sure that thread tension disks  and  securely rise
when hand lifter lever  is turned in the direction of the arrow.
(2) When you want to change the tension of the thread take-up spring
❸
❹
❼
❺
❾
❶
❷
❸
❶
❷

❽

1) Tension of thread take-up spring ❶ on the right
is adjustable by turning spring stud ❷ to the right
to increase or to the left to reduce.
2) Tension of thread take-up spring ❸ on the left is
adjustable by turning spring stud ❹ to the right
to increase or to the left to reduce.
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