SINGER 15-91 - Manual (Page 25)

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stud, being sure that the lug (M, Fig. 19) engages
the short recess (P) to prevent the plate from turn­
ing on the stud. Next, place the two tension discs
(H) on the stud, having the flat thread-bearing sides
of the discs together; then replace the indicator (G)
with the large open side facing end of stud so that
the plus and minus signs will be readily seen from a
sewing position as shown in Fig. 20. Insert the ten­
sion spring (F) in the indicator so that the first half
turn of this spring will straddle the lower half of the
tension stud. Guide the stop washer (D) onto the
stud so that the extension (S) will be above the
tension stud as shown in Fig. 20.
If the spring and stop washer are in correct posi­
tion, the extension will clear the first half coil of the
spring as shown in
Fig. 21.
Next place the
numbered dial on
the stud so that the
numeral 2 is oppo­
site the stop washer
extension (S), then
push the dial to
compress the spring
so that the thumb
nut can be turned
onto the stud, carefully guiding the pin in the thumb
nut into one of the holes in the numbered dial. Then
lower the presser bar and turn the thumb nut (A)
to the left until it stops at “0.” Thread the tension
and pull the thread through the tension discs to test
the amount of tension at the“0” position. At this
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ig
. 21