UnionSpecial 53700B, Adjusting Instructions And Illustrated Parts List

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THREAD TENSION RELEASE (CONTINUED)
If adjustmentis needed, loosen tension release lever screw (A, Fig. 12), located at the back of the
machine and move tension disc separator as required. Retighten screw. After adjustment there should
be no binding at any point.
SETTING HEIGHT OF PRESSER BAR
The height of the presser bar (C, Fig. 3) is set correctly if it is possible to remove
the presser foot when the foot lifter lever (B, Fig. 12) is fully depressed.
If adjustment is necessary, turnhandwheel in operating direction until the needle
bar is in the low position. Loosen screws (G, Fig. 3), then, while holding presser foot
down on the throat plate surface, pry up presserbar connectionand guide(H) with
ascrewdriver to obtain the 1/16 inch setting and retighten screws.
THREADING
Draw the looper and needle threads into the ma-
chine and start operating on a piece of fabric.
Refer to threading diagram (Fig. 1) for manner of
threading these machines.
SETTING NEEDLE THREAD TAKE-UP WIRE AND
FRAME EYELET
Set the needle thread take-up wire (A, Fig. 13) so
that its upper surface is even with the top of the
hole in the needle bar thread eyelet (B) when the
needle bar is at the bottom of its stroke. Lower this
setting for a smaller needle thread loop or raise it
for a larger loop.
Set the needle thread frame eyelet (C, Fig. 13) perpendicular to the machine base
and 1/4" above the mounting screw. Lower if more needle thread is desired in the
stitch or raise for less.
SETTING LOOPER THREAD TAKE-UP
The looper thread retainer finger (A, Fig. 14) should be set so that the looper thread
is cast-off just after the eye of the needle comes up out of the material. Coordi-
nated positioning can be acquired by loosening screws (B and C). After looper
thread retainer finger has been properly set, retighten screws.
PRESSER FOOT PRESSURE
Regulate the presser spring regulating screw (D, Fig. 13) so that it exerts only
enough pressure on the presser foot to feed the work uniformly when a slight
tension is placed on the fabric. Turning it clockwise increases the pressure, counter-
clockwise acts the reverse.
Fig. 14
Fig. 13
Fig. 12