Installing The Knee-Lifter; Lubricating Method - JUKI DU-1481 Series Instruction Manual

3-2. Installing the knee-lifter

❶
❷
❹

3-3. Lubricating method

WARNING :
After the completion of lubrication, insert the power plug. In the case the power plug is inserted
ahead of lubrication, the sewing machine can automatically start running when the operator de-
presses the pedal by mistake, causing a serious injury.
When handling the lubricating oil, be sure to wear protective goggles and gloves to prevent the
lubricating oil from contacting the eyes and skin. Contact with the lubricating oil can lead to inflam-
mation or irritation of the eyes and skin. The lubricating oil is not drinkable. Drinking the lubricating
oil can cause vomiting and diarrhea. Be sure to keep the lubricating oil out of reach of children.
When you use the sewing machine for the first time after the delivery or after a prolonged period
of disuse, it is necessary to lubricate the sewing machine and run it at a low speed until the entire
sewing machine is fully lubricated.
A
❶
❸
❶
❷
B
– 3 –
1. Set up knee-lifter shafts ❷ while fully pulling
this side of the shafts respectively until it will go
no further.
2. Attach driving arms ❶ to knee-lifter shafts ❷ .
3. Connect right and left driving arms ❶ with links
❸ .
4. Attach knee-lifter lever ❹ to driving arm ❶ .
Reference amount of lift of the press-
er foot with the knee lifter is 15 mm in
the case the alternating vertical move-
ment amount is 2 mm.
As the alternating vertical movement
is increased, the amount of lift of the
presser foot is decreased.
Pour new special-purpose oil into the oil pan until
the oil surface reaches the line A of the oil pan.
Carry out lubrication while carefully checking the
oil amount in the oil pan. After the completion of
lubrication of the oil pan, make sure that the oil
surface is aligned with the line A.
While the sewing machine is in opera-
tion, check the state of lubricating oil
through oil sight window ❶ .