Initial Position Of The Bobbin Case Opening Lever; Standard Adjusting Position For The Inner Hook Guide Arm Shaft - JUKI LH-4128-7 Engineer's Manual

(3) Initial position of the bobbin case opening lever

o LH-4128, 4128-7, 4168-7
When adjustment is based on the central point
marking, the amount of opening for the inner hook stop
(standard adjusting value).

(4) Standard adjusting position for the inner hook guide arm shaft

Standard Adjustment
(green engraved marker line) of the 3-serial engraved
and the throat plate rib
o LH-4188-7
Standard Adjustment
Setscrew
Slot
– 18 –
becomes 0.3mm
Press the bobbin case
stopper
against the throat plate
ribs .
A