JUKI LK-1900B series, Engineer'S Manual

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Procedures of assembling
1. Pass the two lubrication pipes ❻ and the oil drain pipe ❼ through the frame, and mount the shuttle .
2. Hold the lubrication pipe ❻ with the lubrication pipe holder plate and fix it with the setscrew ❶ .
At that time, make sure not to let the lubrication pipe ❻ come in contact with the thread trimmer connec-
tor rod.
3. Pass the lubrication pipe ❻ through the cord clamp and fix it with the setscrew ❶ .
At that time, the needle thread clamp sensor cord should be passed beneath the lubrication pipe ❻
and the oil drain pipe ❼ .
If the needle thread clamp sensor cord is located above them, this can be a cause of abrasion or
cable breakage in the crosswise feed main .
4. Using the harness band ❷ and the lubrication pipe holder , stretch and fix the lubrication pipe ❻
along the wall side of the frame.
At that time, make sure not to permit the lubrication pipe ❻ to touch the needle thread clamp connector
link.
5. Bundle the needle thread clamp sensor cord , the lubrication pipe ❻ , and the oil drain pipe ❼ with
the harness band ❸ .
6. Pass the two lubrication pipes ❻ through the cord clamp and fix them with the setscrew ❶ .
7. Insert the two lubrication pipes ❻ (part B) in the oil tank ❺ . Fix the oil tank ❺ to the frame with the
setscrew ❹ .
8. Fix the oil drain pipe ❼ to the rear side by means of the cord clamp.
9. Fix the shuttle and mount the driver ❾ . (Refer to "3.-(10) Hook adjustment".)
* Harness bands ❷ and ❸ : Part No. EA9500B0100
Adjustment procedures Results of Improper adjustment
Bring needle bar ❶ to the lowest position of its stroke. Loosen nee-
dle bar connection screw ❷ and adjust so that upper marker line
❹ engraved on the needle bar aligns with the bottom end of needle
bar bushing lower ❸ .
(Caution) After the adjustment, make sure that there is no un -
even torque.
* When stitch skipping occurs in accordance with the sewing con-
ditions, adjust the height of the needle bar so as to lower it by 0.5
to 1 mm from the needle bar engraved line ❹ .