Singer 9985 - Bobbin Setting; A. Removing the Bobbin; B. Setting Spool of Thread on Spool Pin; C. Winding the Bobbin

SERVICE MANUAL
28
16.ADJUSTING THE LOWER THREAD TENSION
The bobbin thread tension is correctly adjusted at the
factory and normally it would not be necessary for you to
make adjustments yourself.
If adjustments are necessary adjust as follows.
1. Remove the needle plate.
2. To obtain a weaker bobbin thread tension, turn the
screw (a) which is located on the front part of bobbin
case counter clockwise, and for a stronger tension,
turn screw clockwise.
3. Replace the needle plate.
2
a
17.FLATNESS OF THE BASE
1. Remove the Extension Table.
2. Place the machine on table.
3. Adjust the height of the rubber feet (c, d) by turning
the adjusting screws (a, b) so that the base will be
stabilized.
3
a
b
c
d
15.UPPER THREAD TENSION UNIT
The upper thread tension regulator unit has been
adjusted to the best sewing conditions when pattern is
selected. However, if you wish to change this, do it as
follows:
1. Remove the thread tension cover, unit cover and front
enclosure.
2. Loosen the lock screw (a). (1.5 mm hex wrench)
3. Adjust the tension by turning the tension regulator
screw (b) either to the front or back.
• For a stronger tension, turn screw backward
• For a weaker tension, turn screw frontward.
4. Retghten the lock screw (a).
2
a
b