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Adjustment Procedures Results of Improper Adjustment
1) Remove cloth base side cover 2 and top feed cover 1.
2) Bring the needle bar to the lowest point of its stroke and keep
top feed dog 7 at the height of 9 ± 0.5 mm (MO-6900J : 10.5 ±
0.5 mm) from the top surface of the throat plate.
(Insert the spacer between the throat plate and top feed dog 7.)
3) Loosen clamping screw 4 of lifter A 3.
4) Press presser lifting lever 5 until it will go no further and turn
it. In this state, turn lifter A 3 and strike the pin section to the
eaves section of top feed square block 6. Then tighten
clamping screw 4 of lifter A 3.
(Caution) In the state that presser lifting lever 5 is returned,
check that there is a clearance between the pin of lifter A
3 and the eaves section of top feed square block 6.
5) Return top feed cover 1 and cloth base side cover 2 to their
home positions.
™ When the lifting amount of top
feed dog 7 is excessively high,
contact of top feed square block
6 with the pin section of liter A
3 occurs at the time of
operation and something is
wrong with the machine.
™ When the lifting amount of top
feed dog 7 is excessively low,
cloth or the presser becomes
hard to be removed at the thick
section such as overlapped
section or the like.
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