JUKI MOL-254 Engineer's Manual page 51

Adjustment Procedures
Remove the cloth feed base, the cloth presser lower plate,
and the throat plate, and adjust the position with screw
(Caution) ○ Positions on the left and right sides will vary
according to the fixed position of shuttle set
screw .
○ Make sure of the position of the shuttle
upper spring when adjusting hook timing
(especially, adjusting the blade point of the
hook).
When the dimension of 0.2 mm X 0.8 mm is not obtained,
correct it with oil stone.
Results of Improper Adjustment
○ If the position is shifted in any
.
○ If the position is excessively
44
− −
direction, front/rear or left/right,
a phenomenon that needle
thread is caught in the hook will
occur.
moved to the rear, moving knife
may not catch needle thread.