the presser bar lifting bracket pinch screw (figure
4-11 [C]). Turn the balance wheel toward the
operator until the feed dogs rise to meet the
forward presser foot at the top of the throat plate.
Press the presser bar lifting bracket down to the
hand lifting lever (figure 4-11 [D]). Tighten the
presser bar lifting bracket pinch screw (figure 4-11
[C]) and the lifting crank pinch screw (figure 4-11
5 . A d j u s t i n g t h e u p p e r t h r e a d - t e n s i o n -
The upper thread-tension release allows the
goods to be removed without the needle thread
a. Lift the presser-lifting lever and observe
the thread tension disc. It should separate to
release the thread. If not, proceed as follows:
b. Remove the thread controller assembly
from the machine as follows:
(1) Remove the thread controller as-
sembly retaining screw (figure 4-6 ).
(2) Loosen the thread controller stud
setscrew (figure 4-6 [J]).
(3) Pull the thread controller assembly
away from the machine.
c. Bend the thread releasing lever (figure
4-12 [B]) away from the thread controller
assembly to increase the amount of the release and
toward the plate to decrease the tension as needed.
d. Reattach the assembly to the machine
and observe the operation. Repeat steps a through
d if necessary.
6. Setting the feed indicator disc
Loosen the setscrew in the feed indicator
disc (figure 4-1 [E]) so that it spins on the arm
shaft. Depress the feed indicator plunger and turn
the balance wheel toward you until it drops; keep
turning the balance wheel toward you until it
stops. The feed-driving eccentric is now set at
3 1/2 SPI.
NOTE: With the plunger engaged, turning the
balance wheel toward you decreases the SPI, and
t u r n i n g t h e b a l a n c e w h e e l a w a y f r o m y ou
increases the SPI.
The ideal setting for the indicator disc on
the sewing machine is 8 SPI. You accomplish this
setting by engaging the plunger and turning the
balance wheel approximately one-fourth of a turn
away from you. Release the plunger, make several
inches of stitches on a piece of paper, and count
the total number of stitches per inch. If you are
I, depress the plunger and slow/y turn
the balance wheel toward the operator until the
l S t o p.
. Release the plunger and the balance
. Now turn the feed indicator disc (figure
4-1 [E]) on the arm shaft until 8 shows in the
window on the uprise of your machine.
. T i g h t e n t h e s e t s c r e w i n t h e f e ed
7. Setting the thread controller spring
The thread controller spring prevents the
needle from piercing the thread. It takes the slack
out of the needle thread until the point of the
needle enters the material.
To properly set the tension on the thread
controller spring, you must first loosen the thread
controller stud setscrew on the tension stud (figure
4-6 [J]). Turn the tension stud counterclockwise
for more tension or clockwise for less tension.
A properly adjusted controller spring rests
on the thread controller spring stop as the point
of the needle enters the material. This action
releases all tension on the needle thread.
8. Setting the controller spring stop
You may have to make an adjustment to
the controller spring stop to allow the thread
controller spring to operate properly. This is a
very simple adjustment. By loosening the tension
stud screw, shown in figure 4-6 (I), you raise the
stop for less action or lower it for more action.
9. Adjusting the thread tension
The thread tension will be the last adjust-
ment required. In most cases, you can make any
adjustment required by turning the thumb nut
(figure 4-12 [A]) on the needle thread tension
If the stitch is locking on top of the
material, turn the nut counterclockwise. This