JUKI lbh-1790 series Engineer's Manual page 47

1. Removing the main shaft
1) Remove the face plate section referring to "(5) Disassemblint/assembling the face plate section".
2) Loosen two coupling setscrews 1. (LOCKTITE is applied to setscrews 1.)
3) Loosen timing belt 2, remove timing belt 2 from main shaft sprocket 3 and loosen two main shaft
sprocket setscrews 4.
4) Loosen two bush setscrews 6 in main shaft front bearing 5.
5) Loosen two setscrews in bobbin winder driving wheel 7 and draw forward main shaft 8 together
with counter weight 9.
2. Assembling the main shaft
1) Insert counter weight 9 and main shaft 8 into the section of main shaft front bearing 5 and main
shaft intermediate bearing !0 .
2) Lightly press counter weight 9 from the front to the rear and fix two bush setscrews 6 in main shaft
front bearing 5.
(Adjust so that screw No. 1 is set to the flat section of main shaft 8.)
3) Lightly press forward the main shaft sprocket and fix two setscrews 4 in main shaft sprocket 3.
(Adjust so that screw No. 1 is set to the flat section of main shaft 8.)
4) Fix two coupling setscrews 1.
(Adjust so that screw No. 1 is set to the flat section of main shaft 8.)
5) Adjust the position of bobbin winder driving wheel 7 and fix it with two setscrews.
Procedures of disassembling/assembling
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