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thread guard enters the hole in the machine arm, and the tail (inside the coil) of the thread take-up spring enters
against the shoulder of the stud. Then insert the tension spring F in the indicator with the first (half) coil
TO DISASSEMBLE THE NEEDLE THREAD TENSION
(See Fig. 20) Turn the thumb nut B to the left until it stops at "0" on the numbered dial, then press in the dial to disengage the pin C in the thumb nut from the dial, and remove the thumb nut and dial, stop washer E, tension spring F, indicator G and tension disc assembly H which includes the thread take-up spring, thread guard plate and two discs. Note: It is not necessary to remove the stud 0 from the machine arm to disassemble the thread tension. It is shown removed in Fig. 20 only for the purpose of illustration. .

one of the grooves in the stud. Next replace the indicator with the large open side facing the end of the stud so that the plus and minus marks will be at the top (with the minus sign at the left) and hold the parts, thus assembled,
TO REGULATE THE BOBBIN THREAD TENSION
The tension on the bobbin thread is regulated by the screw A, Fig. 11 which is nearest the centre of the tension spring on the outside of the bobbin case. To increase the tension, turn screw A over to the right. To decrease the tension, turn this screw over to the left.
When the tension on the bobbin thread has been once properly adjusted, it is seldom necessary to change it, as a correct stitch can usually be obtained by varying the tension on the needle thread.

TO REASSEMBLE THE NEEDLE THREAD TENSION
(See Figs. 21 and 22)
First make sure that the tension releasing pin J, only the end of which is shown in Fig. 20, is in place in the stud 0.