SINGER 15-91 - Manual (Page 24)

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There should be no necessity for removing or
taking this tension apart. However if, for any
reason, it becomes necessary to remove the tension,
proceed as follows:
Turn the thumb nut (A, Fig. 19) away from jmu
(toward the left) until it stops at “0” on the num-
EUI39\
F ig . 19. N eedle T hre .^ d T ension D isassembled
bei'ed dial (C); then press in the dial to disengage
the pin (B) in the thumb nut and remove the thumb
nut, dial, stop washer (D), tension spring (F), indi­
cator (G), the two tension discs (H), thread guard
plate (L), and the tension releasing pin (J), as shown
in Fig. 19. To remove the pin (J) from the stud (N),
take off the face plate and tilt it so that the pin
will drop out.
To Reassemble the Needle Thread Tension
Replace the face plate, insert the tension releasing
pin in the stud, place the thread guard plate on the
N F2 F G M
F ig . 20. R eassembling and R eplacing the T ension